VENHART, M.; ALI, F.A.; RYSSENS, W.; WOOD, J.L.; JOSS, D.T.; ANDREYEV, A.N.; AURANEN, K.; BALLY, B.; BALOGH, M.; BENDER, M.; CARROLL, R.J.; EASTON, J.L.; GREENLEES, P.T.; GRAHN, T.; HEENEN, P.H.; HERZÁŇ, A.; JAKOBSSON, U.; JULIN, R.; JUUTINEN, S.; KĹČ, D.; KONKI, J.; LAWRIE, E.; LEINO, M.; MATOUŠEK, V.; MCPEAKE, C.G.; O'DONNELL, D.; PAGE, R.D.; PAKARINEN, J.; PARTANEN, J.; PEURA, P.; RAHKILA, P.; RUOTSALAINEN, P.; SANDZELIUS, M.; SARÉN, J.; SAYĞI, B.; SEDLÁK, M.; SCHOLEY, C.; SORRI, J.; STOLZE, S.; THORNTHWAITE, A.; UUSITALO, J.; VESELSKÝ, M.

doi:10.1103/PhysRevC.95.061302

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Phys.Rev.C. 2017, vol. 95, n° 6, p. 061302

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Excited states in the proton-unbound nuclide $^{177}$Au were populated in the $^92}$Mo($^{88}$Sr, p2n) reaction and identified using the Jurogam-II and GREAT spectrometers in conjunction with the RITU gas-filled separator at the University of Jyväskylä Accelerator Laboratory. A strongly coupled band and its decay path to the 11/2−α-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 1h11/2 proton hole to the excited 02+ configuration in the $^{178}$Hg core. Although these configurations might be expected to follow the parabolic trend of core Hg(02+) states as a function of neutron number, the electromagnetic decay paths from the strongly coupled band in $^{177}$Au 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+1Hg core occurs below the neutron midshell.< Réduire

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

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