De-excitation of the strongly coupled band in Au-177 and implications for core intruder configurations in the light Hg isotopes

Venhart, M.; Ali, F.; Ryssens, W.; Wood, J.; Joss, D.; Andreyev, A.; Auranen, K.; Bally, B.; Balogh, M.; Bender, M.; Carroll, R.; Easton, J.; Greenlees, P.; Grahn, T.; Heenen, P.; Herzan, A.; Jakobsson, U.; Julin, R.; Juutinen, S.; Kic, D.; Konki, J.; Lawrie, E.; Leino, M.; Matousek, V.; McPeake, C.; O'Donnell, D.; Page, R.; Pakarinen, J.; Partanen, J.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Saren, J.; Saygi, BAHADIR; Sedlak, M.; Scholey, C.; Sorri, J.; Stolze, S.; Thornthwaite, A.; Uusitalo, J.; Veselsky, M.

doi:10.1103/physrevc.95.061302

De-excitation of the strongly coupled band in Au-177 and implications for core intruder configurations in the light Hg isotopes

Atıf İçin Kopyala

Venhart M., Ali F. A., Ryssens W., Wood J. L., Joss D. T., Andreyev A. N., ...Daha Fazla

PHYSICAL REVIEW C, cilt.95, sa.6, 2017 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 95 Sayı: 6
Basım Tarihi: 2017
Doi Numarası: 10.1103/physrevc.95.061302
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Ankara Üniversitesi Adresli: Hayır

Özet

Excited states in the proton-unbound nuclide Au-177 were populated in the Mo-92(Sr-88, p2n) reaction and identified using the Jurogam-II and GREAT spectrometers in conjunction with the RITU gas-filled separator at the University of Jyvaskyla Accelerator Laboratory. A strongly coupled band and its decay path to the 11/2 alpha-decaying isomer have been identified using recoil-decay tagging. Comparisons with cranked Hartree-Fock-Bogoliubov (HFB) calculations based on Skyrme energy functionals suggest that the band has a prolate deformation and is based upon coupling the odd 1h(11/2) proton hole to the excited 0(2)(+) configuration in the Hg-178 core. Although these configurations might be expected to follow the parabolic trend of core Hg(0(2)(+)) states as a function of neutron number, the electromagnetic decay paths from the strongly coupled band in Au-177 are markedly different from those observed in the heavier isotopes above the midshell. This indicates that a significant change in the structure of the underlying (A+) Hg-1 core occurs below the neutron midshell.