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

doi:10.1016/0375-9474(89)90129-2

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

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

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 language	English
Pages (from-to)	43-76
Number of pages	34
Journal	Nuclear Physics, Section A
Volume	500
Issue number	1
DOIs	https://doi.org/10.1016/0375-9474(89)90129-2
State	Published - Aug 14 1989

Bibliographical note

Funding Information:
We wish to thank J. Blomqvist, R.F. Casten, E.A. Henry, K. Heyde, P. Kleinheinz, H. Mach, M.T. McEllistrem, R.A. Meyer, K. Sistemich, M.L. Stolzenwald and J.L. Weil for most useful discussions at various stages of the work. Support of the Hungarian Academy of Sciences, the U.S. National Science Foundation under grants No. INT-8512479 and No. PHY-8702369, and the Research Council for Natural Sciences of the Academy of Finland is gratefully acknowledged.

Funding Information:
* Research sponsored by the Hungarian Academy of Sciences, the U.S. National Science Foundation under grants No. INT-8512479 and No. PHY-8702369, and the Research Council for Natural Sciences of the Academy of Finland. ’ Currently on leave at the Institut fiir Kernphysik, KFA Jiilich, D-5170 Jiilich, Fed. Rep. Germany.

Keywords

Nuclear Reactions

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/0375-9474(89)90129-2

Cite this

@article{428bbc194e15476aadd6897365b10b57,

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

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.",

keywords = "Nuclear Reactions",

author = "G. Moln{\'a}r and T. Belgya and B. Fazekas and {\'A} Verbs and Yates, {S. W.} and Kleppinger, {E. W.} and Gatenby, {R. A.} and R. Julin and J. Kumpulainen and A. Passoja and E. Verho",

note = "Funding Information: We wish to thank J. Blomqvist, R.F. Casten, E.A. Henry, K. Heyde, P. Kleinheinz, H. Mach, M.T. McEllistrem, R.A. Meyer, K. Sistemich, M.L. Stolzenwald and J.L. Weil for most useful discussions at various stages of the work. Support of the Hungarian Academy of Sciences, the U.S. National Science Foundation under grants No. INT-8512479 and No. PHY-8702369, and the Research Council for Natural Sciences of the Academy of Finland is gratefully acknowledged. Funding Information: * Research sponsored by the Hungarian Academy of Sciences, the U.S. National Science Foundation under grants No. INT-8512479 and No. PHY-8702369, and the Research Council for Natural Sciences of the Academy of Finland. {\textquoteright} Currently on leave at the Institut fiir Kernphysik, KFA Jiilich, D-5170 Jiilich, Fed. Rep. Germany.",

year = "1989",

month = aug,

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doi = "10.1016/0375-9474(89)90129-2",

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T1 - Particle-hole and vibrational states in doubly closed subshell 96Zr from in-beam inelastic neutron and proton scattering

AU - Molnár, G.

AU - Belgya, T.

AU - Fazekas, B.

AU - Verbs, Á

AU - Yates, S. W.

AU - Kleppinger, E. W.

AU - Gatenby, R. A.

AU - Julin, R.

AU - Kumpulainen, J.

AU - Passoja, A.

AU - Verho, E.

N1 - Funding Information: We wish to thank J. Blomqvist, R.F. Casten, E.A. Henry, K. Heyde, P. Kleinheinz, H. Mach, M.T. McEllistrem, R.A. Meyer, K. Sistemich, M.L. Stolzenwald and J.L. Weil for most useful discussions at various stages of the work. Support of the Hungarian Academy of Sciences, the U.S. National Science Foundation under grants No. INT-8512479 and No. PHY-8702369, and the Research Council for Natural Sciences of the Academy of Finland is gratefully acknowledged. Funding Information: * Research sponsored by the Hungarian Academy of Sciences, the U.S. National Science Foundation under grants No. INT-8512479 and No. PHY-8702369, and the Research Council for Natural Sciences of the Academy of Finland. ’ Currently on leave at the Institut fiir Kernphysik, KFA Jiilich, D-5170 Jiilich, Fed. Rep. Germany.

PY - 1989/8/14

Y1 - 1989/8/14

N2 - 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.

AB - 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.

KW - Nuclear Reactions

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