Fully aligned high-spin states in {sup 86}Zr

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Bulletin of the American Physical Society

OSTI ID:255482

Doring, J; Hohns, G D; Sylvan, G N ^[1]

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1. and others

To study multi-quasiparticle excitations and their interplay with collective degrees of freedom at very high spins, a new in-beam investigation of the even-even {sup 86}Zr has been performed via the {sup 58}Ni({sup 32}S,4p) reaction at 135 MeV using the early implementation of GAMMASPHERE combined with the 47{pi} charged particle detector system MICROBALL. The yrast positive- and negative-parity sequences have been extended up to 30{sup +} and 27{sup -} levels, respectively. Calculations within the configuration-dependent shell-correction method using a cranked Nilsson potential have shown that the highest spins are built from the six g{sub 9}/2 neutrons and at most four protons excited from the p{sup 1/2}, p{sub 3/2}, f{sub 5/2} subshells to the g{sub 9}/2 subshell at a small deformation. The 30{sup +} and 27{sup -} states are the highest possible fully-aligned states based on holes in the N = 3 shell. Higher spins can be built by promotion of one neutron from the g{sub 9}/2 to the g{sub 7}/2 subshell but with a quite high energy cost.

• OSTI ID: 255482
• Report Number(s): CONF-9510116--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 10 Vol. 40; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
HIGH SPIN STATES
NICKEL 58 TARGET
SULFUR 32 REACTIONS
ZIRCONIUM 86