Particle-hole and vibrational states in doubly closed subshell 96Zr from in-beam inelastic neutron and proton scattering

G. Molnár, T. Belgya, B. Fazekas, Á Verbs, S. W. Yates, E. W. Kleppinger, R. A. Gatenby, R. Julin, J. Kumpulainen, A. Passoja, E. Verho

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Abstract

Through in-beam (n, n′ γ) and (p, p′ γ) reaction studies, we have identified 33 levels in 96Zr and, from (n, n′) cross section and γ-ray angular distribution data, we have made spin-parity assignments for twenty of these levels. Recent DSAM nuclear level lifetimes were combined with electronic timing measurements in interpreting these states. The 1750 keV 2+ and 2439 keV 3+ states are suggested as the lowest neutron particle-hole multiplet, of ν(3s 1 2, 2d 5 2-) type, expected from the double closed subshell picture. On the other hand, the band built on the 1582 keV 0+ shape isomer is determined to have vibrational collectivity up to the two-phonon level. Candidates for two-phonon vibrational states of quadrupole-octupole and double octupole type, associated with the ground-state structure exhibiting octupole softness, are proposed.

Original languageEnglish
Pages (from-to)43-76
Number of pages34
JournalNuclear Physics, Section A
Volume500
Issue number1
DOIs
Publication statusPublished - Aug 14 1989

Keywords

  • Nuclear Reactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Molnár, G., Belgya, T., Fazekas, B., Verbs, Á., Yates, S. W., Kleppinger, E. W., Gatenby, R. A., Julin, R., Kumpulainen, J., Passoja, A., & Verho, E. (1989). Particle-hole and vibrational states in doubly closed subshell 96Zr from in-beam inelastic neutron and proton scattering. Nuclear Physics, Section A, 500(1), 43-76. https://doi.org/10.1016/0375-9474(89)90129-2