The Experts below are selected from a list of 5748 Experts worldwide ranked by ideXlab platform
N P Merenkov - One of the best experts on this subject based on the ideXlab platform.
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radiative correction to the transferred polarization in elastic electron Proton scattering
Physical Review D, 2001Co-Authors: Andrei Afanasev, Igor Akushevich, N P MerenkovAbstract:Model independent radiative correction to the Recoil Proton polarization for the elastic electron-Proton scattering is calculated within method of electron structure functions. The explicit expressions for the Recoil Proton polarization are represented as a contraction of the electron structure and the hard part of the polarization dependent contribution into cross-section. The calculation of the hard part with first order radiative correction is performed. The obtained representation includes the leading radiative corrections in all orders of perturbation theory and the main part of the second order next-to-leading ones. Numerical calculations illustrate our analytical results.
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Calculation of the QED correction to the Recoil Proton polarization by the electron structure function method
Physical Review D, 2000Co-Authors: Andrei Afanasev, Igor Akushevich, N P MerenkovAbstract:Model independent radiative correction to the Recoil Proton polarization for the elastic electron-Proton scattering is calculated within method of electron structure functions. The explicit expressions for the Recoil Proton polarization are represented as a contraction of the electron structure and the hard part of the polarization dependent contribution into cross-section. The calculation of the hard part with first order radiative correction is performed. The obtained representation includes the leading radiative corrections in all orders of perturbation theory and the main part of the second order next-to-leading ones. Numerical calculations illustrate our analytical results.
A. Camsonne - One of the best experts on this subject based on the ideXlab platform.
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Angular dependence of Recoil Proton polarization in high-energy d ! pn
2008Co-Authors: X. Jiang, J. Arrington, F. Benmokhtar, A. Camsonne, S. Choi, E. Chudakov, F. Cusanno, A. Deur, D. Dutta, F. GaribaldiAbstract:We measured the angular dependence of the three Recoil Proton polarization components in twobody photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily. Transverse polarizations are not well described, but suggest isovector dominance.
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Recoil-Proton polarization in high-energy deuteron photodisintegration with circularly polarized photons.
Physical review letters, 2007Co-Authors: X. Jiang, J. Arrington, F. Benmokhtar, A. Camsonne, S. Choi, E. Chudakov, F. Cusanno, A. Deur, J. P. Chen, D. DuttaAbstract:We measured the angular dependence of the three Recoil-Proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily. Transverse polarizations are not well described, but suggest isovector dominance.
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Polarization Transfer in Proton Compton Scattering at High Momentum Transfer
Physical Review Letters, 2005Co-Authors: D.j. Hamilton, A. Camsonne, L. Bimbot, V. H. Mamyan, K. A. Aniol, J. R. M. Annand, P.y. Bertin, P. Bosted, J. R. Calarco, G. C. ChangAbstract:Compton scattering from the Proton was investigated at s =(6.9 GeV)**2 and t = (-4.0 GeV)**2 via polarization transfer from circularly polarized incident photons. The longitudinal and transverse components of the Recoil Proton polarization were measured. The results are in excellent agreement with a prediction based on a reaction mechanism in which the photon interacts with a single quark carryingthe spin ofthe Proton and in disagreement with a prediction of pQCD basedon a two-gluon exchange mechanism.
Xingqiu Yuan - One of the best experts on this subject based on the ideXlab platform.
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Recoil-Proton track imaging as a new way for neutron spectrometry measurements.
Scientific reports, 2018Co-Authors: Hu Jing, L. Chen, Leidang Zhou, Jinliang Liu, Zhongbing Zhang, Yuhang Guo, Yao Zhiming, Xingqiu YuanAbstract:Recoil-Proton track imaging (RPTI) is an attractive technique to optically record the tracks of Recoil Protons in scintillation gas by using realtime imaging devices. For the first time, its use as an online nuclear track detector for neutron spectrometry measurements (NSM) is explored. Based on the RPTI methodology for NSM, a very basic detector system is designed, consisting of the neutron-to-Proton Recoil system and Proton track imaging system. Satisfactory performance of the RPTI neutron spectrometer has been examined with a series of Monte Carlo simulations. Moreover, using well-defined line-Proton sources from a tandem accelerator, the capability of the detector for imaging Proton tracks at the single-particle level in real time has been validated in preliminary experiments. From the clear single Proton tracks in the images, the Proton ranges were easily distinguished, and precise Proton energy spectra were unfolded, laying a solid experimental foundation for the future implementation of NSM.
D. Dutta - One of the best experts on this subject based on the ideXlab platform.
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Angular dependence of Recoil Proton polarization in high-energy d ! pn
2008Co-Authors: X. Jiang, J. Arrington, F. Benmokhtar, A. Camsonne, S. Choi, E. Chudakov, F. Cusanno, A. Deur, D. Dutta, F. GaribaldiAbstract:We measured the angular dependence of the three Recoil Proton polarization components in twobody photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily. Transverse polarizations are not well described, but suggest isovector dominance.
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Recoil-Proton polarization in high-energy deuteron photodisintegration with circularly polarized photons.
Physical review letters, 2007Co-Authors: X. Jiang, J. Arrington, F. Benmokhtar, A. Camsonne, S. Choi, E. Chudakov, F. Cusanno, A. Deur, J. P. Chen, D. DuttaAbstract:We measured the angular dependence of the three Recoil-Proton polarization components in two-body photodisintegration of the deuteron at a photon energy of 2 GeV. These new data provide a benchmark for calculations based on quantum chromodynamics. Two of the five existing models have made predictions of polarization observables. Both explain the longitudinal polarization transfer satisfactorily. Transverse polarizations are not well described, but suggest isovector dominance.
Hu Jing - One of the best experts on this subject based on the ideXlab platform.
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Recoil-Proton track imaging as a new way for neutron spectrometry measurements.
Scientific reports, 2018Co-Authors: Hu Jing, L. Chen, Leidang Zhou, Jinliang Liu, Zhongbing Zhang, Yuhang Guo, Yao Zhiming, Xingqiu YuanAbstract:Recoil-Proton track imaging (RPTI) is an attractive technique to optically record the tracks of Recoil Protons in scintillation gas by using realtime imaging devices. For the first time, its use as an online nuclear track detector for neutron spectrometry measurements (NSM) is explored. Based on the RPTI methodology for NSM, a very basic detector system is designed, consisting of the neutron-to-Proton Recoil system and Proton track imaging system. Satisfactory performance of the RPTI neutron spectrometer has been examined with a series of Monte Carlo simulations. Moreover, using well-defined line-Proton sources from a tandem accelerator, the capability of the detector for imaging Proton tracks at the single-particle level in real time has been validated in preliminary experiments. From the clear single Proton tracks in the images, the Proton ranges were easily distinguished, and precise Proton energy spectra were unfolded, laying a solid experimental foundation for the future implementation of NSM.
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Determination of fast neutron spectrum using Recoil-Proton track imaging method
Journal of Instrumentation, 2018Co-Authors: Hu Jing, Zhi-ling Zhang, L. Chen, Jian Liu, M. Yan, K. Zhao, Leidang Zhou, P. JinAbstract:High sensitivity and good neutron/gamma discrimination, as well as online determination, are goals that researchers are pursuing for fast neutron spectrum measurements (FNSM). For this purpose, we are attempting a novel approach based on the Recoil-Proton track imaging (RPTI) method to do FNSM. The RPTI neutron spectrometer has been designed and built, and it mainly consists of a polyethylene foil for converting neutrons to Protons, a gas scintillation chamber for generating photons along the Recoil Proton track, and a scientific camera system for recording the track photons in real time. Proof-of-principle experiments have been performed with the RPTI neutron spectrometer at a DT neutron generator at China Institute of Atomic Energy. As a result, numerous Recoil Proton track images at the single-particle level were successfully acquired and revealed in real time. Also, the Proton tracks can be clearly distinguished from the background in the track images, indicating good signal-to-background ratio of the system. Particularly, both the Proton ranges and the Bragg curve peak positions can be extracted online from the track images, which can lead to online generation of DT neutron spectra. These results show promising performance of the novel fast neutron spectrometer, which will bring significant advantages in various applications.