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P. A. Butler - One of the best experts on this subject based on the ideXlab platform.
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Coulomb excitation of pear-shaped nuclei
EPJ Web of Conferences, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, Timothy ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
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The observation of vibrating pear-shapes in Radon nuclei
Nature Communications, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, T. ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in ^224Rn and ^226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.Octupole deformation in nuclei is important to understand nuclear structure and electric dipole moments of heavy atoms. Here the authors measure energies of excited quantum states in Radon Isotopes and find that these Isotopes do not provide favourable conditions in the search for CP-violation.
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The observation of vibrating pear-shapes in Radon nuclei.
Nature communications, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, Timothy ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
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The observation of vibrating pear-shapes in Radon nuclei
'Springer Science and Business Media LLC', 2019Co-Authors: P. A. Butler, L. P. Gaffney, J F Smith, Spagnoletti P, Konki J, Scheck M, Abrahams K, Bowry M, Cederkäll J, Chupp TAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.status: publishe
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X-ray production with heavy post-accelerated radioactive-ion beams in the lead region of interest for Coulomb-excitation measurements
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2015Co-Authors: N. Bree, L. P. Gaffney, P. A. Butler, K. Wrzosek-lipska, Tuomas Grahn, Mark Huyse, N. Kesteloot, Janne Pakarinen, A. Petts, P. Van DuppenAbstract:Abstract Characteristic K X-rays have been observed in Coulomb-excitation experiments with heavy radioactive-ion beams in the lead region (Z = 82), produced at the REX-ISOLDE facility, and were used to identify the decay of strongly converted transitions as well as monopole 0 2 + → 0 1 + transitions. Different targets were used, and the X-rays were detected by the Miniball γ-ray spectrometer surrounding the target position. A stable mercury isotope, as well as neutron-deficient mercury, lead, polonium, and Radon Isotopes were studied, and a detailed description of the analysis using the radioactive 182,184,186,188Hg Isotopes is presented. Apart from strongly converted transitions originating from the decay of excited states, the heavy-ion induced K-vacancy creation process has been identified as an extra source for K X-ray production. Isolating the atomic component of the observed K X-rays is essential for a correct analysis of the Coulomb-excitation experiment. Cross sections for the atomic reaction have been estimated and are compared to a theoretical approach.
Timothy Chupp - One of the best experts on this subject based on the ideXlab platform.
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Coulomb excitation of pear-shaped nuclei
EPJ Web of Conferences, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, Timothy ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
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The observation of vibrating pear-shapes in Radon nuclei.
Nature communications, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, Timothy ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
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On-line collection and transfer of radioactive noble gas Isotopes
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2004Co-Authors: S. R. Nuss-warren, Eric Tardiff, T. Warner, G. C. Ball, J.a. Behr, Timothy Chupp, Kevin P. Coulter, G. Hackman, Michael E. Hayden, Matthew PearsonAbstract:Abstract Techniques have been developed for on-line collection and transfer to a measurement cell of rare noble gas Isotopes. A low-energy isotope separator beam is stopped in a foil. After collection, the foil is heated, and the noble gas atoms are cryopumped to a cold finger and then transferred with a buffer gas to a measurement cell. This has been tested with 120 Xe produced from a 120 Cs beam at the TRIUMF ISAC facility, and greater than 40% efficiency for transfer from the foil to the cell has been demonstrated. The technique will be used for electric dipole moment measurements with Radon Isotopes and may also be useful for other measurements with gaseous targets including laser spectroscopy.
F. Herfurth - One of the best experts on this subject based on the ideXlab platform.
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Discovery of 229Rn and the structure of the heaviest Rn and Ra Isotopes from Penning-Trap mass measurements
Physical review letters, 2009Co-Authors: D. Neidherr, G. Audi, D. Beck, K. Blaum, C. Bohm, M. Breitenfeldt, R. B. Cakirli, R. F. Casten, S. George, F. HerfurthAbstract:The masses of the neutron-rich Radon Isotopes {sup 223-229}Rn have been determined for the first time, using the ISOLTRAP setup at CERN ISOLDE. In addition, this experiment marks the first discovery of a new nuclide, {sup 229}Rn, by Penning-trap mass measurement. The new, high-accuracy data allow a fine examination of the mass surface, via the valence-nucleon interaction {delta}V{sub pn}. The results reveal intriguing behavior, possibly reflecting either a N=134 subshell closure or an octupolar deformation in this region.
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Discovery of (229)Rn and the Structure of the Heaviest Rn and Ra Isotopes from Penning-Trap Mass Measurements
Physical Review Letters, 2009Co-Authors: D. Neidherr, G. Audi, D. Beck, K. Blaum, C. Bohm, M. Breitenfeldt, R. B. Cakirli, R. F. Casten, S. George, F. HerfurthAbstract:The masses of the neutron-rich Radon Isotopes (223-229)Rn have been determined for the first time, using the ISOLTRAP setup at CERN ISOLDE. In addition, this experiment marks the first discovery of a new nuclide, (229)Rn, by Penning-trap mass measurement. The new, high-accuracy data allow a fine examination of the mass surface, via the valence-nucleon interaction delta V(pn). The results reveal intriguing behavior, possibly reflecting either a N=134 subshell closure or an octupolar deformation in this region.
L. P. Gaffney - One of the best experts on this subject based on the ideXlab platform.
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Coulomb excitation of pear-shaped nuclei
EPJ Web of Conferences, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, Timothy ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
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The observation of vibrating pear-shapes in Radon nuclei
Nature Communications, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, T. ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in ^224Rn and ^226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.Octupole deformation in nuclei is important to understand nuclear structure and electric dipole moments of heavy atoms. Here the authors measure energies of excited quantum states in Radon Isotopes and find that these Isotopes do not provide favourable conditions in the search for CP-violation.
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The observation of vibrating pear-shapes in Radon nuclei.
Nature communications, 2019Co-Authors: P. A. Butler, L. P. Gaffney, J. Konki, K. Abrahams, M. Bowry, J. Cederkäll, Paolo Spagnoletti, Max Scheck, J F Smith, Timothy ChuppAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
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The observation of vibrating pear-shapes in Radon nuclei
'Springer Science and Business Media LLC', 2019Co-Authors: P. A. Butler, L. P. Gaffney, J F Smith, Spagnoletti P, Konki J, Scheck M, Abrahams K, Bowry M, Cederkäll J, Chupp TAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.status: publishe
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X-ray production with heavy post-accelerated radioactive-ion beams in the lead region of interest for Coulomb-excitation measurements
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2015Co-Authors: N. Bree, L. P. Gaffney, P. A. Butler, K. Wrzosek-lipska, Tuomas Grahn, Mark Huyse, N. Kesteloot, Janne Pakarinen, A. Petts, P. Van DuppenAbstract:Abstract Characteristic K X-rays have been observed in Coulomb-excitation experiments with heavy radioactive-ion beams in the lead region (Z = 82), produced at the REX-ISOLDE facility, and were used to identify the decay of strongly converted transitions as well as monopole 0 2 + → 0 1 + transitions. Different targets were used, and the X-rays were detected by the Miniball γ-ray spectrometer surrounding the target position. A stable mercury isotope, as well as neutron-deficient mercury, lead, polonium, and Radon Isotopes were studied, and a detailed description of the analysis using the radioactive 182,184,186,188Hg Isotopes is presented. Apart from strongly converted transitions originating from the decay of excited states, the heavy-ion induced K-vacancy creation process has been identified as an extra source for K X-ray production. Isolating the atomic component of the observed K X-rays is essential for a correct analysis of the Coulomb-excitation experiment. Cross sections for the atomic reaction have been estimated and are compared to a theoretical approach.
Chupp T - One of the best experts on this subject based on the ideXlab platform.
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The observation of vibrating pear-shapes in Radon nuclei
'Springer Science and Business Media LLC', 2020Co-Authors: Butler P.a., Spagnoletti P, Konki J, Scheck M, Abrahams K, Bowry M, Cederkäll J, Gaffney L.p., Smith J.f., Chupp TAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in $^{224}$Rn and $^{226}$Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the standard model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in $^{224}$Rn and $^{226}$Rn by accelerating beams of these radioactive nuclei. We report here additional states not assigned in our 2019 publication. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment
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The observation of vibrating pear shapes in Radon nuclei: update
'Springer Science and Business Media LLC', 2020Co-Authors: Butler P. A., Spagnoletti P, Konki J, Scheck M, Abrahams K, Bowry M, Cederkäll J, Gaffney L. P., Smith J. F., Chupp TAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the standard model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in $^{224}$Rn and $^{226}$Rn by accelerating beams of these radioactive nuclei. We report here additional states not assigned in our 2019 publication. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.Comment: Updated from Nat. Comm. 10 (2019) 247
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The observation of vibrating pear-shapes in Radon nuclei
'Springer Science and Business Media LLC', 2020Co-Authors: Butler P.a., Spagnoletti P, Konki J, Scheck M, Abrahams K, Bowry M, Cederkäll J, Gaffney L.p., Smith J.f., Chupp TAbstract:6 pags., 4 fig.s, 1 tab. -- Open Access funded by Creative Commons Atribution Licence 4.0There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in Rn and Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.The support of the ISOLDE Collaboration and technical teams is acknowledged. This work was supported by the following Research Councils and Grants: Science and Technology Facilities Council (STFC; UK) grants ST/ P004598/1, ST/L005808/1; Federal Ministry of Education and Research (BMBF; Germany) grants 05P18RDCIA, 05P15PKCIA and 05P18PKCIA and the “Verbundprojekt 05P2018”; National Science Centre (Poland) grant 2015/18/M/ST2/00523; European Union’s Horizon 2020 Framework research and innovation programme 654002 (ENSAR2); Marie Skłodowska-Curie COFUND grant (EU-CERN) 665779; Research Foundation Flanders (FWO, Belgium), by GOA/2015/010 (BOF KU Leuven) and the Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office (BriX network P7/12); RFBR(Russia) grant 17-52-12015
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The observation of vibrating pear-shapes in Radon nuclei
'Springer Science and Business Media LLC', 2019Co-Authors: P. A. Butler, L. P. Gaffney, J F Smith, Spagnoletti P, Konki J, Scheck M, Abrahams K, Bowry M, Cederkäll J, Chupp TAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.status: publishe
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The observation of vibrating pear-shapes in Radon nuclei
'Springer Science and Business Media LLC', 2019Co-Authors: Butler P. A., Spagnoletti P, Konki J, Scheck M, Abrahams K, Bowry M, Cederkäll J, Gaffney L. P., Smith J. F., Chupp TAbstract:There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both Radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that Radon Isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that Radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.peerReviewe
