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Observation of isomeric decays in the r-process waiting-point nucleus 130Cd82 |
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| Authors: | Jungclaus A Cáceres L Górska M Pfützner M Pietri S Werner-Malento E Grawe H Langanke K Martínez-Pinedo G Nowacki F Poves A Cuenca-García J J Rudolph D Podolyak Z Regan P H Detistov P Lalkovski S Modamio V Walker J Bednarczyk P Doornenbal P Geissel H Gerl J Grebosz J Kojouharov I Kurz N Prokopowicz W Schaffner H Wollersheim H J Andgren K Benlliure J Benzoni G Bruce A M Casarejos E Cederwall B Crespi F C L Hadinia B Hellström M Hoischen R Ilie G Jolie J Khaplanov A Kmiecik M Kumar R Maj A Mandal S Montes F Myalski S Simpson G S Steer S J Tashenov S Wieland O |
| Affiliation: | Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain. |
| Abstract: | The gamma decay of excited states in the waiting-point nucleus (130)Cd(82) has been observed for the first time. An 8(+) two-quasiparticle isomer has been populated both in the fragmentation of a (136)Xe beam as well as in projectile fission of 238U, making (130)Cd the most neutron-rich N = 82 isotone for which information about excited states is available. The results, interpreted using state-of-the-art nuclear shell-model calculations, show no evidence of an N = 82 shell quenching at Z = 48. They allow us to follow nuclear isomerism throughout a full major neutron shell from (98)Cd(50) to (130)Cd(82) and reveal, in comparison with (76)Ni(48) one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions. |
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