Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag
The change of the shell structure in atomic nuclei, so-called “nuclear shell evolution”, occurs due to changes of major configurations through particle-hole excitations inside one nucleus, as well as due to variation of the number of constituent protons or neutrons. We have investigated how the shel...
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2021
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oai:doaj.org-article:29005e94ee184b86bed2467106c7f9b52021-12-04T04:32:39ZImpact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag0370-269310.1016/j.physletb.2021.136766https://doaj.org/article/29005e94ee184b86bed2467106c7f9b52021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0370269321007061https://doaj.org/toc/0370-2693The change of the shell structure in atomic nuclei, so-called “nuclear shell evolution”, occurs due to changes of major configurations through particle-hole excitations inside one nucleus, as well as due to variation of the number of constituent protons or neutrons. We have investigated how the shell evolution affects Gamow-Teller (GT) transitions that dominate the β decay in the region below 132Sn using the newly obtained experimental data on a long-lived isomer in 127Ag. The T1/2=67.5(9) ms isomer has been identified with a spin and parity of (27/2+) at an excitation energy of 1942−20+14 keV, and found to decay via an internal transition of an E3 character, which competes with the dominant β-decay branches towards the high-spin states in 127Cd. The underlying mechanism of a strong GT transition from the 127Ag isomer is discussed in terms of configuration-dependent optimization of the effective single-particle energies in the framework of a shell-model approach.H. WatanabeC.X. YuanG. LorussoS. NishimuraZ.Y. XuT. SumikamaP.-A. SöderströmP. DoornenbalF. BrowneG. GeyH.S. JungJ. TaproggeZs. VajtaH.K. WangJ. WuA. YagiH. BabaG. BenzoniK.Y. ChaeF.C.L. CrespiN. FukudaR. GernhäuserN. InabeT. IsobeA. JungclausD. KamedaG.D. KimY.K. KimI. KojouharovF.G. KondevT. KuboN. KurzY.K. KwonG.J. LaneZ. LiC.-B. MoonA. Montaner-PizáK. MoschnerF. NaqviM. NiikuraH. NishibataD. NishimuraA. OdaharaR. OrlandiZ. PatelZs. PodolyákH. SakuraiH. SchaffnerG.S. SimpsonK. SteigerH. SuzukiH. TakedaA. WendtK. YoshinagaElsevierarticleShell evolutionGamow-Teller β decayIsomer127AgRadioactive isotope beamPhysicsQC1-999ENPhysics Letters B, Vol 823, Iss , Pp 136766- (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
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Shell evolution Gamow-Teller β decay Isomer 127Ag Radioactive isotope beam Physics QC1-999 |
| spellingShingle |
Shell evolution Gamow-Teller β decay Isomer 127Ag Radioactive isotope beam Physics QC1-999 H. Watanabe C.X. Yuan G. Lorusso S. Nishimura Z.Y. Xu T. Sumikama P.-A. Söderström P. Doornenbal F. Browne G. Gey H.S. Jung J. Taprogge Zs. Vajta H.K. Wang J. Wu A. Yagi H. Baba G. Benzoni K.Y. Chae F.C.L. Crespi N. Fukuda R. Gernhäuser N. Inabe T. Isobe A. Jungclaus D. Kameda G.D. Kim Y.K. Kim I. Kojouharov F.G. Kondev T. Kubo N. Kurz Y.K. Kwon G.J. Lane Z. Li C.-B. Moon A. Montaner-Pizá K. Moschner F. Naqvi M. Niikura H. Nishibata D. Nishimura A. Odahara R. Orlandi Z. Patel Zs. Podolyák H. Sakurai H. Schaffner G.S. Simpson K. Steiger H. Suzuki H. Takeda A. Wendt K. Yoshinaga Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag |
| description |
The change of the shell structure in atomic nuclei, so-called “nuclear shell evolution”, occurs due to changes of major configurations through particle-hole excitations inside one nucleus, as well as due to variation of the number of constituent protons or neutrons. We have investigated how the shell evolution affects Gamow-Teller (GT) transitions that dominate the β decay in the region below 132Sn using the newly obtained experimental data on a long-lived isomer in 127Ag. The T1/2=67.5(9) ms isomer has been identified with a spin and parity of (27/2+) at an excitation energy of 1942−20+14 keV, and found to decay via an internal transition of an E3 character, which competes with the dominant β-decay branches towards the high-spin states in 127Cd. The underlying mechanism of a strong GT transition from the 127Ag isomer is discussed in terms of configuration-dependent optimization of the effective single-particle energies in the framework of a shell-model approach. |
| format |
article |
| author |
H. Watanabe C.X. Yuan G. Lorusso S. Nishimura Z.Y. Xu T. Sumikama P.-A. Söderström P. Doornenbal F. Browne G. Gey H.S. Jung J. Taprogge Zs. Vajta H.K. Wang J. Wu A. Yagi H. Baba G. Benzoni K.Y. Chae F.C.L. Crespi N. Fukuda R. Gernhäuser N. Inabe T. Isobe A. Jungclaus D. Kameda G.D. Kim Y.K. Kim I. Kojouharov F.G. Kondev T. Kubo N. Kurz Y.K. Kwon G.J. Lane Z. Li C.-B. Moon A. Montaner-Pizá K. Moschner F. Naqvi M. Niikura H. Nishibata D. Nishimura A. Odahara R. Orlandi Z. Patel Zs. Podolyák H. Sakurai H. Schaffner G.S. Simpson K. Steiger H. Suzuki H. Takeda A. Wendt K. Yoshinaga |
| author_facet |
H. Watanabe C.X. Yuan G. Lorusso S. Nishimura Z.Y. Xu T. Sumikama P.-A. Söderström P. Doornenbal F. Browne G. Gey H.S. Jung J. Taprogge Zs. Vajta H.K. Wang J. Wu A. Yagi H. Baba G. Benzoni K.Y. Chae F.C.L. Crespi N. Fukuda R. Gernhäuser N. Inabe T. Isobe A. Jungclaus D. Kameda G.D. Kim Y.K. Kim I. Kojouharov F.G. Kondev T. Kubo N. Kurz Y.K. Kwon G.J. Lane Z. Li C.-B. Moon A. Montaner-Pizá K. Moschner F. Naqvi M. Niikura H. Nishibata D. Nishimura A. Odahara R. Orlandi Z. Patel Zs. Podolyák H. Sakurai H. Schaffner G.S. Simpson K. Steiger H. Suzuki H. Takeda A. Wendt K. Yoshinaga |
| author_sort |
H. Watanabe |
| title |
Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag |
| title_short |
Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag |
| title_full |
Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag |
| title_fullStr |
Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag |
| title_full_unstemmed |
Impact of shell evolution on Gamow-Teller β decay from a high-spin long-lived isomer in 127Ag |
| title_sort |
impact of shell evolution on gamow-teller β decay from a high-spin long-lived isomer in 127ag |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://doaj.org/article/29005e94ee184b86bed2467106c7f9b5 |
| work_keys_str_mv |
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