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Evolution of the N=82 Shell Gap below 132Sn Inferred from Core Excited States in 131In

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Author

  • M. Gorska
  • L. Caceres
  • H. Grawe
  • M. Pfuetzner
  • A. Jungclaus
  • S. Pietri
  • E. Werner-Malento
  • Z. Podolyak
  • P. H. Regan
  • Dirk Rudolph
  • R. Detistov
  • S. Lalkovski
  • V. Modamio
  • J. Walker
  • T. Beck
  • P. Bednarczyk
  • P. Doornenbal
  • H. Geissel
  • J. Gerl
  • J. Grebosz
  • Robert Hoischen
  • I. Kojouharov
  • N. Kurz
  • W. Prokopowicz
  • H. Schaffner
  • H. Weick
  • H. -J. Wollersheim
  • K. Andgren
  • J. Benlliure
  • G. Benzoni
  • A. M. Bruce
  • E. Casarejos
  • B. Cederwall
  • F. C. L. Crespi
  • B. Hadinia
  • Margareta Hellström
  • G. Ilie
  • A. Khaplanov
  • M. Kmiecik
  • R. Kumar
  • A. Maj
  • S. Mandal
  • F. Montes
  • S. Myalski
  • G. S. Simpson
  • S. J. Steer
  • S. Tashenov
  • O. Wieland
  • Zs. Dombradi
  • R. Reiter
  • D. Sohler
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Summary, in English

The gamma-ray decay of ail excited state in In-131, the one proton hole neighbor of the doubly magic (132)sn has been measured. A high-spin, core-excited isomer with T-1/2 = 630(60) us was identified following production by both relativistic fragmentation of a Xe-136 beam and fission Of a U-238 beam. This state deexcites by a single gamma-ray branch of 3782(2) keV from which direct evidence for the size of the N = 82 shell gal) is inferred. The results are discussed in comparison to a shell-model Calculation including configurations across the closed shells at N = 82 and Z = 50. (C) 2009 Elsevier B.V. All rights reserved.

Publishing year

2009

Language

English

Pages

313-316

Publication/Series

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

672

Issue

4-5

Document type

Journal article (letter)

Publisher

Elsevier

Topic

  • Subatomic Physics

Status

Published

Research group

  • Nuclear Structure

ISBN/ISSN/Other

  • ISSN: 0370-2693