Large enhancement of radiative strength for soft transisitons in the quasicontinuum

Details Large enhancement of radiative strength for soft transisitons in the quasicontinuum Large enhancement of radiative strength for soft transisitons in the quasicontinuum

2004-04-26

arxiv.org/abs/nucl-ex/0404033v1

Phys.Rev.Lett. 93 (2004) 142504

Physics

Nuclear Physics

Nuclear Experiment

4 pages including 3 figures

Scientific paper

10.1103/PhysRevLett.93.142504

Radiative strength functions (RSFs) for the 56,57-Fe nuclei below the separation energy are obtained from the 57-Fe(3-He,alpha gamma)56-Fe and 57-Fe(3-He,3-He' gamma)57-Fe reactions, respectively. An enhancement of more than a factor of ten over common theoretical models of the soft (E_gamma ~< 2 MeV) RSF for transitions in the quasicontinuum (several MeV above the yrast line) is observed. Two-step cascade intensities with soft primary transitions from the 56-Fe(n,2gamma)57-Fe reaction confirm the enhancement.

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