Advertisement

The European Physical Journal A

, Volume 35, Issue 2, pp 167–170 | Cite as

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

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 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. Bohr, B.R. Mottelson, Nuclear Structure, Vol. 2 (Benjamin, New York, 1975).Google Scholar
  2. 2.
    C.M. Petrache, G. Lo Bianco, D. Ward, A. Galindo-Uribarri, P. Spolaore, D. Bazzacco, T. Kröll, S. Lunardi, R. Menegazzo, C. Rossi Alvarez, A.O. Macchiavelli, M. Cromaz, P. Fallon, G.J. Lane, W. Gast, R.M. Lieder, G. Falconi, A.V. Afanasjev, I. Ragnarsson, Phys. Rev. C 61, 011305(R) (1999).CrossRefADSGoogle Scholar
  3. 3.
    C.M. Petrache, M. Fantuzi, G. Lo Bianco, D. Mengoni, A. Neußer-Neffgen, H. Hübel, A. Al-Khatib, P. Bringel, A. Bürger, N. Nenoff, G. Schönwaßer, A.K. Singh, I. Ragnarsson, G.B. Hagemann, B. Herskind, D.R. Jensen, G. Sletten, P. Fallon, A. Görgen, P. Bednarczyk, D. Curien, G. Gangopadhyay, A. Korichi, A. Lopez-Martens, B.V.T. Rao, T.S. Reddy, Nirmal Singh, Phys. Rev. C 72, 064318 (2005).CrossRefADSGoogle Scholar
  4. 4.
    C.M. Petrache, R.A. Bark, S.T.H. Murray, M. Fantuzi, E.A. Lawrie, S. Lang, J.J. Lawrie, S.M. Maliage, D. Mengoni, S.M. Mullins, S.S. Ntshangase, T.M. Ramashidzha, I. Ragnarsson, Phys. Rev. C 74, 034304 (2006).CrossRefADSGoogle Scholar
  5. 5.
    M. Müller-Veggian, H. Beuscher, D.R. Haenni, R.M. Lieder, A. Neskakis, C. Mayer-Böricke, Nucl. Phys. A 344, 89 (1980).CrossRefADSGoogle Scholar
  6. 6.
    F. Pühlhofer, Nucl. Phys. A 280, 267 (1977).CrossRefADSGoogle Scholar
  7. 7.
    http://ipnweb.in2p3.fr/\~sep/domcomp/ microelec.html.Google Scholar
  8. 8.
    E. Dafni, H.E. Mahnke, J.W. Noé, M.H. Rafailovich, G.D. Sprouse, Phys. Rev. C 23, 1612 (1981).CrossRefADSGoogle Scholar

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

Personalised recommendations