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2π1νstates populated inTe135fromBe9-induced reactions with aSn132beam

Authors :
C. R. Bingham
J. C. Batchelder
J. M. Allmond
R. L. Varner
A. Ayres
Michael Scott Smith
N. J. Stone
A. Bey
Carl J Gross
P. E. Mueller
B. A. Brown
Brett Manning
K. L. Jones
Dan Shapira
D. W. Stracener
M. E. Howard
W. A. Peters
J. R. Beene
Andrew Stuchbery
Elizabeth Padilla-Rodal
J. F. Liang
Andrew Ratkiewicz
Steven D. Pain
Kyle Schmitt
Caroline D Nesaraja
Chang-Hong Yu
D. C. Radford
A. Galindo-Uribarri
Source :
Physical Review C. 90
Publication Year :
2014
Publisher :
American Physical Society (APS), 2014.

Abstract

$\ensuremath{\gamma}$-ray transitions in ${}^{134}\text{Te}$, ${}^{135}\text{Te}$, and ${}^{136}\text{Te}$ were measured from ${}^{9}\text{Be}$-induced reactions with a radioactive ${}^{132}\text{Sn}$ beam at a sub-Coulomb barrier energy of 3 MeV per nucleon using particle-$\ensuremath{\gamma}$ coincidence spectroscopy. The transitions were selected by gating on alpha-like particles in a CsI detector following a combination of $({}^{9}\text{Be},\ensuremath{\alpha}1n)$, $({}^{9}\text{Be},\ensuremath{\alpha}2n)$, and $({}^{9}\text{Be},\ensuremath{\alpha}3n)$ incomplete fusion-evaporation reactions. Distorted-wave Born approximation calculations suggest little to no contribution from the $({}^{9}\text{Be},{}^{7}\text{He})$, $({}^{9}\text{Be},{}^{6}\text{He})$, and $({}^{9}\text{Be},{}^{5}\text{He})$ direct reactions.$\ensuremath{\gamma}$-ray transitions from previously known ${2}^{+}\ensuremath{\bigotimes}\ensuremath{\nu}\phantom{\rule{0.16em}{0ex}}2{f}_{7/2}$ and ${4}^{+}\ensuremath{\bigotimes}\ensuremath{\nu}\phantom{\rule{0.16em}{0ex}}2{f}_{7/2}$ multiplet members in ${}^{135}\text{Te}$ are observed. A new $\ensuremath{\gamma}$ ray is observed, assigned to the third-excited state in ${}^{135}\text{Te}$, and new ${2}^{+}\ensuremath{\bigotimes}\ensuremath{\nu}\phantom{\rule{0.16em}{0ex}}2{f}_{7/2}$ multiplet members are suggested. In addition, spin assignments are made by using recent one-neutron transfer data. The updated experimental data for ${}^{135}\text{Te}$ are compared to shell-model calculations for a relatively complete set of states up to the yrast ${15/2}^{\ensuremath{-}},{4}^{+}\ensuremath{\bigotimes}\ensuremath{\nu}\phantom{\rule{0.16em}{0ex}}2{f}_{7/2}$ multiplet member at 1505 keV.

Details

ISSN :
1089490X and 05562813
Volume :
90
Database :
OpenAIRE
Journal :
Physical Review C
Accession number :
edsair.doi...........e4c2396550cc9b282471fbb0bd192186