Radiative strength functions in Mo9398

M. Guttormsen, R. Chankova, U. Agvaanluvsan, E. Algin, L. A. Bernstein, F. Ingebretsen, T. Lönnroth, S. Messelt, G. E. Mitchell, J. Rekstad, A. Schiller, S. Siem, A. C. Sunde, A. Voinov, and S. Ødegård
Phys. Rev. C 71, 044307 – Published 20 April 2005

Abstract

Radiative strength functions (RSFs) in Mo9398 have been extracted using the (He3,αγ) and (He3,He3'γ) reactions. The RSFs are U shaped as function of γ energy with a minimum at around Eγ=3MeV. The minimum values increase with neutron number because of the increase in the low-energy tail of the giant electric dipole resonance with nuclear deformation. The unexpected strong increase in strength below Eγ=3MeV, here called soft pole, is established for all Mo9398 isotopes. The soft pole is present at all initial excitation energies in the 58MeV region.

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  • Received 26 November 2004

DOI:https://doi.org/10.1103/PhysRevC.71.044307

©2005 American Physical Society

Authors & Affiliations

M. Guttormsen1,*, R. Chankova1, U. Agvaanluvsan2, E. Algin2,3,4,5, L. A. Bernstein2, F. Ingebretsen1, T. Lönnroth6, S. Messelt1, G. E. Mitchell3,4, J. Rekstad1, A. Schiller2, S. Siem1, A. C. Sunde1, A. Voinov7,8, and S. Ødegård1

  • 1Department of Physics, University of Oslo, N-0316 Oslo, Norway
  • 2Lawrence Livermore National Laboratory, L-414, 7000 East Avenue, Livermore, California 94551
  • 3North Carolina State University, Raleigh, North Carolina 27695
  • 4Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708
  • 5Department of Physics, Osmangazi University, Meselik, Eskisehir, 26480 Turkey
  • 6Department of Physics, Åbo Akademi, FIN-20500 Turku, Finland
  • 7Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701
  • 8Frank Laboratory of Neutron Physics, Joint Institute of Nuclear Research, 141980 Dubna, Moscow Region, Russia

  • *Electronic address: magne.guttormsen@fys.uio.no

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Vol. 71, Iss. 4 — April 2005

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