Phys. Rev. Lett. 93, 142504 (2004) [4 pages]Large Enhancement of Radiative Strength for Soft Transitions in the Quasicontinuum
Radiative strength functions (RSFs) for the 56,57Fe nuclei below the separation energy are obtained from the 57Fe(3He,αγ)56Fe and 57Fe(3He,3He′γ)57Fe reactions, respectively. An enhancement of more than a factor of 10 over common theoretical models of the soft (Eγ≲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 56Fe(n,2γ)57Fe reaction confirm the enhancement. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.142504
DOI:
10.1103/PhysRevLett.93.142504
PACS:
25.40.Lw, 25.20.Lj, 25.55.Hp, 27.40.+z
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