Fermi's golden rule applied to the gamma decay in the quasicontinuum of 46Ti

M. Guttormsen; A. C. Larsen; A. Buerger; A. Goergen; S. Harissopulos; M. Kmiecik; T. Konstantinopoulos; M. Krticka; A. Lagoyannis; T. Loennroth; 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; A. Voinov

doi:10.1103/physrevc.83.014312

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arXiv · 1009.3409

Fermi's golden rule applied to the gamma decay in the quasicontinuum of 46Ti

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Abstract

Particle-gamma coincidences from the 46Ti(p,p' gamma)46Ti inelastic scattering reaction with 15-MeV protons are utilized to obtain gamma-ray spectra as a function of excitation energy. The rich data set allows analyzing the coincidence data with various gates on excitation energy. This enables, for many independent data sets, 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 due to the involved Porter-Thomas fluctuations.

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M. Guttormsen, A. C. Larsen, A. Buerger, A. Goergen, S. Harissopulos, M. Kmiecik, T. Konstantinopoulos, M. Krticka, A. Lagoyannis, T. Loennroth, 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, A. Voinov. 2010-09-17. Fermi's golden rule applied to the gamma decay in the quasicontinuum of 46Ti. https://doi.org/10.1103/physrevc.83.014312

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