Lizarazo, C., Soederstroem, P-A, Werner, V, Pietralla, N., Walker, P. M., Dong, G. X., Xu, F. R., Rodriguez, T. R., Browne, F., Doornenbal, P., Nishimura, S., Nita, C. R., Obertelli, A., Ando, T., Arici, T., Authelet, G., Baba, H., Blazhev, A., Bruce, A. M., Calvet, D., Caroll, R. J., Chateau, F., Chen, S., Chung, L. X., Corsi, A., Cortes, M. L., Delbart, A., Dewald, M., Ding, B., Flavigny, F., Franchoo, S., Gerl, J., Gheller, J-M, Giganon, A., Gillibert, A., Gorska, M., Gottardo, A., Kojouharov, I, Kurz, N., Lapoux, V, Lee, J., Lettmann, M., Linh, B. D., Liu, J. J., Liu, Z., Momiyama, S., Moschner, K., Motobayashi, T., Nagamine, S., Nakatsuka, N., Niikura, M., Nobs, C., Olivier, L., Patel, Z., Paul, N., Podolyak, Zs, Rousse, J-Y, Rudigier, M., Saito, T. Y., Sakurai, H., Santamaria, C., Schaffner, H., Shand, C., Stefan, I, Steppenbeck, D., Taniuchi, R., Uesaka, T., Vaquero, V., Wimmer, K. and Xu, Z. (2020). Metastable States of Se-92,Se-94: Identification of an Oblate K Isomer of Se-94 and the Ground-State Shape Transition between N=58 and 60. Phys. Rev. Lett., 124 (22). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

Here we present new information on the shape evolution of the very neutron-rich Se-92,Se-94 nuclei from an isomer-decay spectroscopy experiment at the Radioactive Isotope Beam Factory at RIKEN. High-resolution germanium detectors were used to identify delayed gamma rays emitted following the decay of their isomers. New transitions are reported extending the previously known level schemes. The isomeric levels are interpreted as originating from high-K quasineutron states with an oblate deformation of beta similar to 0.25, with the high-K state in Se-94 being metastable and K hindered. Following this, Se-94 is the lowest-mass neutron-rich nucleus known to date with such a substantial K hindrance. Furthermore, it is the first observation of an oblate K isomer in a deformed nucleus. This opens up the possibility for a new region of K isomers at low Z and at oblate deformation, involving the same neutron orbitals as the prolate orbitals within the classic Z similar to 72 deformed hafnium region. From an interpretation of the level scheme guided by theoretical calculations, an oblate deformation is also suggested for the Se-94(60) ground-state band.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Lizarazo, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soederstroem, P-AUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Werner, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pietralla, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walker, P. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dong, G. X.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Xu, F. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rodriguez, T. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Browne, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doornenbal, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nishimura, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nita, C. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Obertelli, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ando, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Arici, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Authelet, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baba, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blazhev, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bruce, A. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Calvet, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caroll, R. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chateau, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chen, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chung, L. X.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Corsi, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cortes, M. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Delbart, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dewald, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ding, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Flavigny, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Franchoo, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gerl, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gheller, J-MUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giganon, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gillibert, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gorska, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gottardo, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kojouharov, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kurz, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lapoux, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lettmann, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Linh, B. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, J. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, Z.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Momiyama, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moschner, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Motobayashi, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nagamine, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nakatsuka, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Niikura, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nobs, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Olivier, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Patel, Z.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paul, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Podolyak, ZsUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rousse, J-YUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rudigier, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saito, T. Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sakurai, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Santamaria, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schaffner, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shand, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stefan, IUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Steppenbeck, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Taniuchi, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Uesaka, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vaquero, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wimmer, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Xu, Z.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-332065
DOI: 10.1103/PhysRevLett.124.222501
Journal or Publication Title: Phys. Rev. Lett.
Volume: 124
Number: 22
Date: 2020
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1079-7114
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
NUCLEIMultiple languages
Physics, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/33206

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