Lifetimes of excited states in 196, 198Pt; Application of interacting boson approximation model to even Pt isotopes systematics

H. H. Bolotin; A. E. Stuchbery; I. Morrison; D. L. Kennedy; C. G. Ryan; S. H. Sie

doi:10.1016/0375-9474(81)90759-4

Lifetimes of excited states in ^{196, 198}Pt; Application of interacting boson approximation model to even Pt isotopes systematics

H. H. Bolotin^*, A. E. Stuchbery, I. Morrison, D. L. Kennedy, C. G. Ryan, S. H. Sie

^*Corresponding author for this work

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

54 Citations (Scopus)

Abstract

The lifetimes and lifetime limits of the low-lying excited states up to and including the 6₁⁺ levels in ^{196, 198}Pt were determined by the recoil-distance method (RDM). Gamma-ray angular distributions in ¹⁹⁸Pt were also measured. These states were populated by multiple Coulomb excitation using 220 MeV ⁵⁸Ni ion beams and the measurements were carried out in coincidence with back-scattered projectiles. The measured mean lives of the states and B(E2) values inferred for the transitions between levels are presented. These specific findings, and the observed structure systematics obtained from the combination of the present results and those of prior workers for the even ^194-198Pt isotopes, are critically compared with our structure calculations employing the interacting boson approximation (IBA) model incorporating a symmetry-breaking quadrupole force; evaluative comparisons are also made with boson expansion theory (BET) calculations.

Original language	English
Pages (from-to)	146-174
Number of pages	29
Journal	Nuclear Physics, Section A
Volume	370
Issue number	1
DOIs	https://doi.org/10.1016/0375-9474(81)90759-4
Publication status	Published - 2 Nov 1981
Externally published	Yes

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title = "Lifetimes of excited states in 196, 198Pt; Application of interacting boson approximation model to even Pt isotopes systematics",

abstract = "The lifetimes and lifetime limits of the low-lying excited states up to and including the 61+ levels in 196, 198Pt were determined by the recoil-distance method (RDM). Gamma-ray angular distributions in 198Pt were also measured. These states were populated by multiple Coulomb excitation using 220 MeV 58Ni ion beams and the measurements were carried out in coincidence with back-scattered projectiles. The measured mean lives of the states and B(E2) values inferred for the transitions between levels are presented. These specific findings, and the observed structure systematics obtained from the combination of the present results and those of prior workers for the even 194-198Pt isotopes, are critically compared with our structure calculations employing the interacting boson approximation (IBA) model incorporating a symmetry-breaking quadrupole force; evaluative comparisons are also made with boson expansion theory (BET) calculations.",

keywords = "Nuclear reactions",

author = "Bolotin, {H. H.} and Stuchbery, {A. E.} and I. Morrison and Kennedy, {D. L.} and Ryan, {C. G.} and Sie, {S. H.}",

year = "1981",

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doi = "10.1016/0375-9474(81)90759-4",

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T1 - Lifetimes of excited states in 196, 198Pt; Application of interacting boson approximation model to even Pt isotopes systematics

AU - Bolotin, H. H.

AU - Stuchbery, A. E.

AU - Morrison, I.

AU - Kennedy, D. L.

AU - Ryan, C. G.

AU - Sie, S. H.

PY - 1981/11/2

Y1 - 1981/11/2

N2 - The lifetimes and lifetime limits of the low-lying excited states up to and including the 61+ levels in 196, 198Pt were determined by the recoil-distance method (RDM). Gamma-ray angular distributions in 198Pt were also measured. These states were populated by multiple Coulomb excitation using 220 MeV 58Ni ion beams and the measurements were carried out in coincidence with back-scattered projectiles. The measured mean lives of the states and B(E2) values inferred for the transitions between levels are presented. These specific findings, and the observed structure systematics obtained from the combination of the present results and those of prior workers for the even 194-198Pt isotopes, are critically compared with our structure calculations employing the interacting boson approximation (IBA) model incorporating a symmetry-breaking quadrupole force; evaluative comparisons are also made with boson expansion theory (BET) calculations.

AB - The lifetimes and lifetime limits of the low-lying excited states up to and including the 61+ levels in 196, 198Pt were determined by the recoil-distance method (RDM). Gamma-ray angular distributions in 198Pt were also measured. These states were populated by multiple Coulomb excitation using 220 MeV 58Ni ion beams and the measurements were carried out in coincidence with back-scattered projectiles. The measured mean lives of the states and B(E2) values inferred for the transitions between levels are presented. These specific findings, and the observed structure systematics obtained from the combination of the present results and those of prior workers for the even 194-198Pt isotopes, are critically compared with our structure calculations employing the interacting boson approximation (IBA) model incorporating a symmetry-breaking quadrupole force; evaluative comparisons are also made with boson expansion theory (BET) calculations.

KW - Nuclear reactions

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JO - Nuclear Physics, Section A

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Lifetimes of excited states in ^{196, 198}Pt; Application of interacting boson approximation model to even Pt isotopes systematics

Abstract

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