Identification of excited states in theN=Znucleus68Sewith cluster detectors

Symmetry-unrestricted Skyrme–Hartree–Fock–Bogoliubov calculations for exotic shapes in nuclei from 64Ge to 84Mo

“…These gross features are consistent with available experimental data [60][61][62][63][64][65][66] and previous theoretical calculations [19,21,22,49,[67][68][69][70][71][72][73][74][75][76][77].…”

Evidence for Collective Oblate Rotation inN=Z68Se

“…A great deal of theoretical and experimental work has been dedicated to measuring and understanding this coexistence [2,3]. A key outstanding prediction [2,[4][5][6][7][8] is that the N Z 34 nucleus 68 Se should have a tightly bound oblate ground state with substantial deformation ͑b 20.27͒, stabilized by a large gap in the oblate level sequence at N, Z 34, and also a prolate minimum ͑b 10.27͒ which evolves at low spin. Despite numerous experiments, only a few g-ray transitions have been previously identified in 68 Se [8,9], so the issue of shape could not be properly addressed.…”

“…A key outstanding prediction [2,[4][5][6][7][8] is that the N Z 34 nucleus 68 Se should have a tightly bound oblate ground state with substantial deformation ͑b 20.27͒, stabilized by a large gap in the oblate level sequence at N, Z 34, and also a prolate minimum ͑b 10.27͒ which evolves at low spin. Despite numerous experiments, only a few g-ray transitions have been previously identified in 68 Se [8,9], so the issue of shape could not be properly addressed. In this Letter we present results from an experiment aimed at observing rotational bands built on these configurations and measuring their properties through g-ray spectroscopy.…”

Experimental evidence for56Ni-core breaking from the low-spin structure of theN=ZnucleusLisetskiy1, Pietralla2, Honma3 et al. 2003Phys. Rev. C

“…Recent progress in both experimental and theoretical directions brought new valuable data for the heavy odd-odd N = Z nuclei 46 V [4,5,6,13,14,15,16] , 50 Mn [7,17,18,19,20,21], and 54 Co [22,23,24,25] in the lower part of the pfshell (f 7/2 -shell) and even for some nuclei of the upper part of the pf -shell, like 70 Br [26,27]. While some understanding of the key problems of the low-energy structure of f 7/2 nuclei seems to be obtained and regularities similar to the ones appropriate for the sd-shell are revealed there are still many uncertainties for low-spin structure of these nuclei with mass numbers A > 56 [28,29,30,31,32,33,34,35]. The first odd-odd N = Z nucleus of this region, which may help to draw confident conclusions on the situation in the mass region above 56 Ni is 58 Cu.…”