The European Physical Journal A

, Volume 35, Issue 2, pp 167–170

Lifetime measurement of the six-quasiparticle isomer in 140Nd and evidence for an isomer above the 19/2+ state in 139Nd

  • M. Ferraton
  • R. Bourgain
  • C. M. Petrache
  • D. Verney
  • F. Ibrahim
  • N. de Séréville
  • S. Franchoo
  • M. Lebois
  • C. Phan Viet
  • L. Sagui
  • I. Stefan
  • J. F. Clavelin
  • M. Vilmay
Regular Article - Experimental Physics

DOI: 10.1140/epja/i2007-10534-y

Cite this article as:
Ferraton, M., Bourgain, R., Petrache, C.M. et al. Eur. Phys. J. A (2008) 35: 167. doi:10.1140/epja/i2007-10534-y

Abstract.

The lifetime of the recently discovered six-quasiparticle (6-qp) isomer in 140Nd has been measured using the 126Te(18O, 4n) reaction and the pulsed-beam technique at the Institut de Physique Nucléaire (IPN) Orsay. The deduced lifetime of the 6-qp isomer in 140Nd of 1.23(7)μs supports the 20+ spin-parity assignment to the isomeric state which is based on a spherical configuration that coexists with the triaxial bands observed in this spin range. Evidence for delayed components for the transitions below the 19/2+ state in 139Nd was observed, with an apparent half-life of 272(4)ns.

PACS.

27.60.+j 90 < A < 149  21.60.-n Nuclear structure models and methods 21.10.Tg Lifetimes, widths 

Copyright information

© Società Italiana di Fisica and Springer-Verlag 2008

Authors and Affiliations

  • M. Ferraton
    • 1
  • R. Bourgain
    • 1
  • C. M. Petrache
    • 1
  • D. Verney
    • 1
  • F. Ibrahim
    • 1
  • N. de Séréville
    • 1
  • S. Franchoo
    • 1
  • M. Lebois
    • 1
  • C. Phan Viet
    • 1
  • L. Sagui
    • 1
  • I. Stefan
    • 1
  • J. F. Clavelin
    • 1
  • M. Vilmay
    • 1
  1. 1.Institut de Physique NucléaireIN2P3-CNRS and Université Paris-Sud XIOrsay CedexFrance

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