Fermi’s golden rule applied to the γ decay in the quasicontinuum of Ti46

M. Guttormsen, A. C. Larsen, A. Bürger, A. Görgen, S. Harissopulos, M. Kmiecik, T. Konstantinopoulos, M. Krtička, A. Lagoyannis, T. Lönnroth, K. Mazurek, M. Norrby, H. T. Nyhus, G. Perdikakis, A. Schiller, S. Siem, A. Spyrou, N. U. H. Syed, H. K. Toft, G. M. Tveten, and A. Voinov
Phys. Rev. C 83, 014312 – Published 26 January 2011

Abstract

Particle-γ coincidences from the Ti46(p,pγ)Ti46 inelastic scattering reaction with 15-MeV protons are utilized to obtain γ-ray spectra as a function of excitation energy. The rich data set allows analyzsis of the coincidence data with various gates on excitation energy. For many independent data sets, this enables a simultaneous extraction of level density and radiative strength function (RSF). The results are consistent with one common level density. The data seem to exhibit a universal RSF as the deduced RSFs from different excitation energies show only small fluctuations provided that only excitation energies above 3 MeV are taken into account. If transitions to well-separated low-energy levels are included, the deduced RSF may change by a factor of 2–3, which might be expected because of the involved Porter-Thomas fluctuations.

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  • Received 17 September 2010

DOI:https://doi.org/10.1103/PhysRevC.83.014312

© 2011 American Physical Society

Authors & Affiliations

M. Guttormsen1,*, A. C. Larsen1, A. Bürger1, A. Görgen1, S. Harissopulos2, M. Kmiecik3, T. Konstantinopoulos2, M. Krtička4, A. Lagoyannis2, T. Lönnroth5, K. Mazurek3, M. Norrby5, H. T. Nyhus1, G. Perdikakis2,†, A. Schiller6, S. Siem1, A. Spyrou2,†, N. U. H. Syed1, H. K. Toft1, G. M. Tveten1, and A. Voinov6

  • 1Department of Physics, University of Oslo, N-0316 Oslo, Norway
  • 2Institute of Nuclear Physics, NCSR “Demokritos,” 153.10 Aghia Paraskevi, Athens, Greece
  • 3Institute of Nuclear Physics, PAN, Kraków, Poland
  • 4Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic
  • 5Department of Physics, Åbo Akademi University, FIN-20500 Åbo, Finland
  • 6Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA

  • *magne.guttormsen@fys.uio.no
  • Current address: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824-1321, USA.

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Vol. 83, Iss. 1 — January 2011

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