Impact of a low-energy enhancement in the gamma-ray strength function on the radiative neutron-capture

Abstract

A low-energy enhancement of the gamma-ray strength function in several light and medium-mass nuclei has been observed recently in 3He-induced reactions. The effect of this enhancement on (n,gamma) cross-sections is investigated for stable and unstable neutron-rich Fe, Mo and Cd isotopes. Our results indicate that the radiative neutron capture cross sections may increase considerably due to the low-energy enhancement when approaching the neutron drip line. This could have non-negligible consequences on r-process nucleosynthesis calculations.

9 pages, 7 figures. Published in Phys. Rev. C

References in corpus (5)

• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Nuclear level densities and gamma-ray strength functions in 44,45Sc
• Thermodynamic Properties of ${}^{56,57}$Fe
• Establishment of M1 multipolarity of a 6.5 mu_N^2 resonance in 172-Yb at E_gamma=3.3 MeV
• Enhanced radiative strength in the quasi-continuum of 117Sn

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• Low energy magnetic radiation enhancement in the f${}_{7/2}$ shell
• Multipole excitations in hot nuclei within the finite temperature quasiparticle random phase approximation framework
• Nuclear Level Density and Gamma-Ray Strength Function of 43Sc
• Analysis of uncertainties in alpha-particle optical-potential assessment below the Coulomb barrier
• Primary gamma-ray spectra in 44Ti of astrophysical interest
• Consistent optical potential for incident and emitted low-energy $\alpha$ particles. II. $\alpha$-emission in fast-neutron induced reactions on Zr isotopes
• Effect of broken axial symmetry on the electric dipole strength and the collective enhancement of level densities in heavy nuclei