The Experts below are selected from a list of 2544 Experts worldwide ranked by ideXlab platform

H Geissel - One of the best experts on this subject based on the ideXlab platform.

  • nuclear matter distributions in the neutron rich carbon isotopes 14 17c from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2021
    Co-Authors: A V Dobrovolsky, P Egelhof, G.d. Alkhazov, G A Korolev, S Tang, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract The absolute differential cross sections for small-angle proton elastic scattering off the nuclei 12,14−17C have been measured in inverse kinematics at energies near 700 MeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR served simultaneously as a gas target and a detector for the Recoil Protons. The projectile scattering angles were measured with multi-wire tracking detectors. The radial nuclear matter density distributions and the root-mean-square nuclear matter radii were deduced from the measured cross sections using the Glauber multiple-scattering theory. A possible neutron halo structure in 15C, 16C and 17C is discussed. The obtained data show evidence for a halo structure in the 15C nucleus.

  • nuclear matter distribution in the proton rich nuclei 7be and 8b from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2019
    Co-Authors: A V Dobrovolsky, P Egelhof, A G Inglessi, G.d. Alkhazov, G A Korolev, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract Absolute differential cross sections for elastic p 7 Be and p 8 B small-angle scattering were measured in inverse kinematics at an energy of 0.7 GeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR was used as an active target to detect the Recoil Protons. The projectile tracking and isotope identification were performed with multi-wire proportional chambers and scintillation detectors. The measured cross sections were analysed using the Glauber multiple-scattering theory. The root-mean-square (rms) nuclear matter radii R m = 2.42 ( 4 ) fm for 7Be and R m = 2.58 ( 6 ) fm for 8B were obtained. The radial density distribution deduced for 8B exhibits a proton halo structure with the rms halo radius R h = 4.24 ( 25 ) fm. A comparison of the deduced experimental radii is displayed with existing experimental and theoretical data.

  • halo structure of 8 b determined from intermediate energy proton elastic scattering in inverse kinematics
    Physics Letters B, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    Abstract The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius R m = 2.58 ( 6 ) fm and the rms halo radius R h = 4.24 ( 25 ) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei.

  • Halo structure of 8B determined from intermediate energy proton elastic scattering in inverse kinematics
    Elsevier, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius Rm=2.58(6) fm and the rms halo radius Rh=4.24(25) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei. Keywords: 8B, Proton halo, Proton elastic scattering, Inverse kinematic

  • nuclear matter density distribution in the neutron rich nuclei 12 14be from proton elastic scattering in inverse kinematics
    Nuclear Physics, 2012
    Co-Authors: Sylvia Ilieva, A V Dobrovolsky, P Egelhof, A G Inglessi, Miroslawa Gorska, F Aksouh, L V Chulkov, H Geissel, G.d. Alkhazov, Reba Kanungo
    Abstract:

    Abstract In the present work, the differential cross sections for small-angle proton elastic scattering on the 12,14 Be nuclei were measured in inverse kinematics, using secondary radioactive beams with energies near 700 MeV/u produced with the fragment separator FRS at GSI. The main part of the experimental setup was the active target IKAR, which was used simultaneously as a target and a detector for the Recoil Protons. Auxiliary detectors for projectile tracking and isotope identification completed the setup. The measured differential cross sections were analyzed using the Glauber multiple-scattering theory. For the evaluation of the data several phenomenological nuclear-matter density parametrizations and a sum of Gaussian parametrization were used. The nuclear-matter radii and radial density distributions of the isotopes 12,14 Be were deduced. Extended nuclear-matter density distributions were observed in both isotopes, and the halo structure of 14 Be was confirmed. The results were also compared with microscopic few-body and fermionic molecular dynamics model calculations concerning the structure of these neutron-rich nuclei.

A V Dobrovolsky - One of the best experts on this subject based on the ideXlab platform.

  • nuclear matter distributions in the neutron rich carbon isotopes 14 17c from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2021
    Co-Authors: A V Dobrovolsky, P Egelhof, G.d. Alkhazov, G A Korolev, S Tang, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract The absolute differential cross sections for small-angle proton elastic scattering off the nuclei 12,14−17C have been measured in inverse kinematics at energies near 700 MeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR served simultaneously as a gas target and a detector for the Recoil Protons. The projectile scattering angles were measured with multi-wire tracking detectors. The radial nuclear matter density distributions and the root-mean-square nuclear matter radii were deduced from the measured cross sections using the Glauber multiple-scattering theory. A possible neutron halo structure in 15C, 16C and 17C is discussed. The obtained data show evidence for a halo structure in the 15C nucleus.

  • nuclear matter distribution in the proton rich nuclei 7be and 8b from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2019
    Co-Authors: A V Dobrovolsky, P Egelhof, A G Inglessi, G.d. Alkhazov, G A Korolev, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract Absolute differential cross sections for elastic p 7 Be and p 8 B small-angle scattering were measured in inverse kinematics at an energy of 0.7 GeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR was used as an active target to detect the Recoil Protons. The projectile tracking and isotope identification were performed with multi-wire proportional chambers and scintillation detectors. The measured cross sections were analysed using the Glauber multiple-scattering theory. The root-mean-square (rms) nuclear matter radii R m = 2.42 ( 4 ) fm for 7Be and R m = 2.58 ( 6 ) fm for 8B were obtained. The radial density distribution deduced for 8B exhibits a proton halo structure with the rms halo radius R h = 4.24 ( 25 ) fm. A comparison of the deduced experimental radii is displayed with existing experimental and theoretical data.

  • halo structure of 8 b determined from intermediate energy proton elastic scattering in inverse kinematics
    Physics Letters B, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    Abstract The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius R m = 2.58 ( 6 ) fm and the rms halo radius R h = 4.24 ( 25 ) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei.

  • Halo structure of 8B determined from intermediate energy proton elastic scattering in inverse kinematics
    Elsevier, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius Rm=2.58(6) fm and the rms halo radius Rh=4.24(25) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei. Keywords: 8B, Proton halo, Proton elastic scattering, Inverse kinematic

  • nuclear matter density distribution in the neutron rich nuclei 12 14be from proton elastic scattering in inverse kinematics
    Nuclear Physics, 2012
    Co-Authors: Sylvia Ilieva, A V Dobrovolsky, P Egelhof, A G Inglessi, Miroslawa Gorska, F Aksouh, L V Chulkov, H Geissel, G.d. Alkhazov, Reba Kanungo
    Abstract:

    Abstract In the present work, the differential cross sections for small-angle proton elastic scattering on the 12,14 Be nuclei were measured in inverse kinematics, using secondary radioactive beams with energies near 700 MeV/u produced with the fragment separator FRS at GSI. The main part of the experimental setup was the active target IKAR, which was used simultaneously as a target and a detector for the Recoil Protons. Auxiliary detectors for projectile tracking and isotope identification completed the setup. The measured differential cross sections were analyzed using the Glauber multiple-scattering theory. For the evaluation of the data several phenomenological nuclear-matter density parametrizations and a sum of Gaussian parametrization were used. The nuclear-matter radii and radial density distributions of the isotopes 12,14 Be were deduced. Extended nuclear-matter density distributions were observed in both isotopes, and the halo structure of 14 Be was confirmed. The results were also compared with microscopic few-body and fermionic molecular dynamics model calculations concerning the structure of these neutron-rich nuclei.

P Egelhof - One of the best experts on this subject based on the ideXlab platform.

  • nuclear matter distributions in the neutron rich carbon isotopes 14 17c from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2021
    Co-Authors: A V Dobrovolsky, P Egelhof, G.d. Alkhazov, G A Korolev, S Tang, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract The absolute differential cross sections for small-angle proton elastic scattering off the nuclei 12,14−17C have been measured in inverse kinematics at energies near 700 MeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR served simultaneously as a gas target and a detector for the Recoil Protons. The projectile scattering angles were measured with multi-wire tracking detectors. The radial nuclear matter density distributions and the root-mean-square nuclear matter radii were deduced from the measured cross sections using the Glauber multiple-scattering theory. A possible neutron halo structure in 15C, 16C and 17C is discussed. The obtained data show evidence for a halo structure in the 15C nucleus.

  • nuclear matter distribution in the proton rich nuclei 7be and 8b from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2019
    Co-Authors: A V Dobrovolsky, P Egelhof, A G Inglessi, G.d. Alkhazov, G A Korolev, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract Absolute differential cross sections for elastic p 7 Be and p 8 B small-angle scattering were measured in inverse kinematics at an energy of 0.7 GeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR was used as an active target to detect the Recoil Protons. The projectile tracking and isotope identification were performed with multi-wire proportional chambers and scintillation detectors. The measured cross sections were analysed using the Glauber multiple-scattering theory. The root-mean-square (rms) nuclear matter radii R m = 2.42 ( 4 ) fm for 7Be and R m = 2.58 ( 6 ) fm for 8B were obtained. The radial density distribution deduced for 8B exhibits a proton halo structure with the rms halo radius R h = 4.24 ( 25 ) fm. A comparison of the deduced experimental radii is displayed with existing experimental and theoretical data.

  • halo structure of 8 b determined from intermediate energy proton elastic scattering in inverse kinematics
    Physics Letters B, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    Abstract The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius R m = 2.58 ( 6 ) fm and the rms halo radius R h = 4.24 ( 25 ) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei.

  • Halo structure of 8B determined from intermediate energy proton elastic scattering in inverse kinematics
    Elsevier, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius Rm=2.58(6) fm and the rms halo radius Rh=4.24(25) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei. Keywords: 8B, Proton halo, Proton elastic scattering, Inverse kinematic

  • nuclear matter density distribution in the neutron rich nuclei 12 14be from proton elastic scattering in inverse kinematics
    Nuclear Physics, 2012
    Co-Authors: Sylvia Ilieva, A V Dobrovolsky, P Egelhof, A G Inglessi, Miroslawa Gorska, F Aksouh, L V Chulkov, H Geissel, G.d. Alkhazov, Reba Kanungo
    Abstract:

    Abstract In the present work, the differential cross sections for small-angle proton elastic scattering on the 12,14 Be nuclei were measured in inverse kinematics, using secondary radioactive beams with energies near 700 MeV/u produced with the fragment separator FRS at GSI. The main part of the experimental setup was the active target IKAR, which was used simultaneously as a target and a detector for the Recoil Protons. Auxiliary detectors for projectile tracking and isotope identification completed the setup. The measured differential cross sections were analyzed using the Glauber multiple-scattering theory. For the evaluation of the data several phenomenological nuclear-matter density parametrizations and a sum of Gaussian parametrization were used. The nuclear-matter radii and radial density distributions of the isotopes 12,14 Be were deduced. Extended nuclear-matter density distributions were observed in both isotopes, and the halo structure of 14 Be was confirmed. The results were also compared with microscopic few-body and fermionic molecular dynamics model calculations concerning the structure of these neutron-rich nuclei.

G.d. Alkhazov - One of the best experts on this subject based on the ideXlab platform.

  • nuclear matter distributions in the neutron rich carbon isotopes 14 17c from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2021
    Co-Authors: A V Dobrovolsky, P Egelhof, G.d. Alkhazov, G A Korolev, S Tang, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract The absolute differential cross sections for small-angle proton elastic scattering off the nuclei 12,14−17C have been measured in inverse kinematics at energies near 700 MeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR served simultaneously as a gas target and a detector for the Recoil Protons. The projectile scattering angles were measured with multi-wire tracking detectors. The radial nuclear matter density distributions and the root-mean-square nuclear matter radii were deduced from the measured cross sections using the Glauber multiple-scattering theory. A possible neutron halo structure in 15C, 16C and 17C is discussed. The obtained data show evidence for a halo structure in the 15C nucleus.

  • nuclear matter distribution in the proton rich nuclei 7be and 8b from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2019
    Co-Authors: A V Dobrovolsky, P Egelhof, A G Inglessi, G.d. Alkhazov, G A Korolev, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract Absolute differential cross sections for elastic p 7 Be and p 8 B small-angle scattering were measured in inverse kinematics at an energy of 0.7 GeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR was used as an active target to detect the Recoil Protons. The projectile tracking and isotope identification were performed with multi-wire proportional chambers and scintillation detectors. The measured cross sections were analysed using the Glauber multiple-scattering theory. The root-mean-square (rms) nuclear matter radii R m = 2.42 ( 4 ) fm for 7Be and R m = 2.58 ( 6 ) fm for 8B were obtained. The radial density distribution deduced for 8B exhibits a proton halo structure with the rms halo radius R h = 4.24 ( 25 ) fm. A comparison of the deduced experimental radii is displayed with existing experimental and theoretical data.

  • halo structure of 8 b determined from intermediate energy proton elastic scattering in inverse kinematics
    Physics Letters B, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    Abstract The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius R m = 2.58 ( 6 ) fm and the rms halo radius R h = 4.24 ( 25 ) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei.

  • Halo structure of 8B determined from intermediate energy proton elastic scattering in inverse kinematics
    Elsevier, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius Rm=2.58(6) fm and the rms halo radius Rh=4.24(25) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei. Keywords: 8B, Proton halo, Proton elastic scattering, Inverse kinematic

  • nuclear matter density distribution in the neutron rich nuclei 12 14be from proton elastic scattering in inverse kinematics
    Nuclear Physics, 2012
    Co-Authors: Sylvia Ilieva, A V Dobrovolsky, P Egelhof, A G Inglessi, Miroslawa Gorska, F Aksouh, L V Chulkov, H Geissel, G.d. Alkhazov, Reba Kanungo
    Abstract:

    Abstract In the present work, the differential cross sections for small-angle proton elastic scattering on the 12,14 Be nuclei were measured in inverse kinematics, using secondary radioactive beams with energies near 700 MeV/u produced with the fragment separator FRS at GSI. The main part of the experimental setup was the active target IKAR, which was used simultaneously as a target and a detector for the Recoil Protons. Auxiliary detectors for projectile tracking and isotope identification completed the setup. The measured differential cross sections were analyzed using the Glauber multiple-scattering theory. For the evaluation of the data several phenomenological nuclear-matter density parametrizations and a sum of Gaussian parametrization were used. The nuclear-matter radii and radial density distributions of the isotopes 12,14 Be were deduced. Extended nuclear-matter density distributions were observed in both isotopes, and the halo structure of 14 Be was confirmed. The results were also compared with microscopic few-body and fermionic molecular dynamics model calculations concerning the structure of these neutron-rich nuclei.

G A Korolev - One of the best experts on this subject based on the ideXlab platform.

  • nuclear matter distributions in the neutron rich carbon isotopes 14 17c from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2021
    Co-Authors: A V Dobrovolsky, P Egelhof, G.d. Alkhazov, G A Korolev, S Tang, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract The absolute differential cross sections for small-angle proton elastic scattering off the nuclei 12,14−17C have been measured in inverse kinematics at energies near 700 MeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR served simultaneously as a gas target and a detector for the Recoil Protons. The projectile scattering angles were measured with multi-wire tracking detectors. The radial nuclear matter density distributions and the root-mean-square nuclear matter radii were deduced from the measured cross sections using the Glauber multiple-scattering theory. A possible neutron halo structure in 15C, 16C and 17C is discussed. The obtained data show evidence for a halo structure in the 15C nucleus.

  • nuclear matter distribution in the proton rich nuclei 7be and 8b from intermediate energy proton elastic scattering in inverse kinematics
    Nuclear Physics, 2019
    Co-Authors: A V Dobrovolsky, P Egelhof, A G Inglessi, G.d. Alkhazov, G A Korolev, G Colo, I Dillmann, A Estrade, F Farinon, H Geissel
    Abstract:

    Abstract Absolute differential cross sections for elastic p 7 Be and p 8 B small-angle scattering were measured in inverse kinematics at an energy of 0.7 GeV/u at GSI Darmstadt. The hydrogen-filled ionization chamber IKAR was used as an active target to detect the Recoil Protons. The projectile tracking and isotope identification were performed with multi-wire proportional chambers and scintillation detectors. The measured cross sections were analysed using the Glauber multiple-scattering theory. The root-mean-square (rms) nuclear matter radii R m = 2.42 ( 4 ) fm for 7Be and R m = 2.58 ( 6 ) fm for 8B were obtained. The radial density distribution deduced for 8B exhibits a proton halo structure with the rms halo radius R h = 4.24 ( 25 ) fm. A comparison of the deduced experimental radii is displayed with existing experimental and theoretical data.

  • halo structure of 8 b determined from intermediate energy proton elastic scattering in inverse kinematics
    Physics Letters B, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    Abstract The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius R m = 2.58 ( 6 ) fm and the rms halo radius R h = 4.24 ( 25 ) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei.

  • Halo structure of 8B determined from intermediate energy proton elastic scattering in inverse kinematics
    Elsevier, 2018
    Co-Authors: G A Korolev, A V Dobrovolsky, P Egelhof, A G Inglessi, H Geissel, G.d. Alkhazov, I Dillmann, A Estrade, F Farinon, Sylvia Ilieva
    Abstract:

    The absolute differential cross section for small-angle proton elastic scattering on the proton-rich 8B nucleus has been measured in inverse kinematics for the first time. The experiment was performed using a secondary radioactive beam with an energy of 0.7 GeV/u at GSI, Darmstadt. The active target, namely hydrogen-filled time projection ionization chamber IKAR, was used to measure the energy, angle and vertex point of the Recoil Protons. The scattering angle of the projectiles was simultaneously determined by the tracking detectors. The measured differential cross section is analyzed on the basis of the Glauber multiple scattering theory using phenomenological nuclear-density distributions with two free parameters. The radial density distribution deduced for 8B exhibits a halo structure with the root-mean-square (rms) matter radius Rm=2.58(6) fm and the rms halo radius Rh=4.24(25) fm. The results on 8B are compared to those on the mirror nucleus 8Li investigated earlier by the same method. A comparison is also made with previous experimental results and theoretical predictions for both nuclei. Keywords: 8B, Proton halo, Proton elastic scattering, Inverse kinematic

  • small angle proton elastic scattering from the neutron rich isotopes 6he and 8he and from 4he at 0 7 gev in inverse kinematics
    Nuclear Physics, 2002
    Co-Authors: S R Neumaier, A V Dobrovolsky, P Egelhof, H Geissel, G.d. Alkhazov, M N Andronenko, G Gavrilov, H Irnich, A V Khanzadeev, G A Korolev
    Abstract:

    Abstract Absolute differential cross sections for elastic p 4 He, p 6 He and p 8 He small-angle scattering were measured in inverse kinematics with secondary 4,6,8 He-beams at an energy near 0.7 GeV / u. The experiment was performed using beams from the heavy-ion synchrotron SIS and the fragment separator FRS of GSI Darmstadt. The hydrogen-filled ionization chamber IKAR served simultaneously as a gas target and a detector for the Recoil Protons. Projectile scattering angles were measured with multi-wire tracking detectors. For proton scattering from the neutron-rich isotopes 6 He and 8 He, differential elastic-scattering cross sections d σ/ d t were deduced in the range 0.002⩽|t|⩽0.05  (GeV /c ) 2 of the four-momentum transfer squared t . For elastic p 4 He scattering, the data obtained in the t -range 0.002⩽|t|⩽0.02  (GeV /c ) 2 supplement the results from an earlier work performed in direct kinematics. From the differential cross sections the integral elastic-scattering cross sections σ el , the total cross sections σ tot , and the total reaction cross sections σ r for the proton–nucleus strong interaction were evaluated. The data obtained on d σ/ d t allow the radial matter distributions in the 6 He and 8 He nuclei to be determined and the corresponding root-mean-square matter radii to be deduced.