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Claes Fahlander

Professor emeritus

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New sub-us Isomers in 125Sn, 127Sn, 129Sn and Isomer Systematics of 124-130Sn

Author

  • R. L. Lozeva
  • G. S. Simpson
  • H. Grawe
  • G. Neyens
  • L. A. Atanasova
  • D. L. Balabanski
  • D. Bazzacco
  • F. Becker
  • P. Bednarczyk
  • G. Benzoni
  • N. Blasi
  • A. Blazhev
  • A. Bracco
  • C. Brandau
  • L. Caceres
  • F. Camera
  • S. K. Chamoli
  • F. C. L. Crespi
  • J. -M. Daugas
  • P. Detistov
  • M. De Rydt
  • P. Doornenbal
  • Claes Fahlander
  • E. Farnea
  • G. Georgiev
  • J. Gerl
  • K. A. Gladnishki
  • M. Gorska
  • J. Grebosz
  • M. Hass
  • Robert Hoischen
  • G. Ilie
  • M. Ionescu-Bujor
  • A. Iordachescu
  • J. Jolie
  • A. Jungclaus
  • M. Kmiecik
  • I. Kojouharov
  • N. Kurz
  • S. P. Lakshmi
  • G. Lo Bianco
  • S. Mallion
  • A. Maj
  • D. Montanari
  • O. Perru
  • M. Pfuetzner
  • S. Pietri
  • J. A. Pinston
  • Zs. Podolyak
  • W. Prokopowicz
  • Dirk Rudolph
  • G. Rusev
  • T. R. Saitoh
  • A. Saltarelli
  • H. Schaffner
  • R. Schwengner
  • S. Tashenov
  • K. Turzo
  • J. J. Valiente-Dobon
  • N. Vermeulen
  • J. Walker
  • E. Werner-Malento
  • O. Wieland
  • H. -J. Wollersheim
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Summary, in English

New sub-mu s isomers have been observed in the neutron-rich Sn isotopes. Sn-125,Sn-127,Sn-129 nuclei have been produced in a relativistic fission reaction of U-238 on a Be-9 target at 750 A.MeV and by the fragmentation of Xe-136 at 600 A.MeV populating high-spin yrast states. In addition to the already known mu s isomers, three new ones with sub-mu s half-lives have been observed. These yrast isomers are the high-spin members of the nu(d(3/2)(-1)h(11/2)(-2)) and nu h(11/2)(-n), seniority v = 3 multiplets leading to isomeric (23/2(+)) and (27/2(-)) states, respectively. Added to the already known 19/2(+)mu s isomers in this region the current work completes the systematic information of neutron-hole excitations toward the filling of the last h(11/2) orbital at N = 82. The results are discussed in the framework of state-of-the-art shell-model calculations using realistic interactions.

Department/s

  • Nuclear physics

Publishing year

2008

Language

English

Publication/Series

Physical Review C (Nuclear Physics)

Volume

77

Issue

6

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

Research group

  • Nuclear Structure

ISBN/ISSN/Other

  • ISSN: 0556-2813