Radiative strength functions in 93-98Mo

Abstract

Radiative strength functions (RSFs) in 93-98Mo have been extracted using the (3He,alpha gamma) and (3He,3He' gamma) reactions. The RSFs are U-shaped as function of gamma energy with a minimum at around E_gamma=3 MeV. The minimum values increase with neutron number due to the increase in the low-energy tail of the giant electric dipole resonance with nuclear deformation. The unexpected strong increase in strength below E_gamma=3 MeV, here called soft pole, is established for all 93-98Mo isotopes. The soft pole is present at all initial excitation energies in the 5-8 MeV region.

10 pages, including 4 figures

References in corpus (9)

• Extraction of level density and gamma strength function from primary gamma spectra
• Large enhancement of radiative strength for soft transisitons in the quasicontinuum
• Odd-even staggering of binding energies as a consequence of pairing and mean-field effects
• Gamma-ray strength function and pygmy resonance in rare earth nuclei
• Observation of Thermodynamical Properties in the ${}^{162}$Dy, ${}^{166}$Er and ${}^{172}$Yb Nuclei
• Thermal properties and radiative strengths in 160,161,162Dy
• Level densities and $\gamma$-strength functions in ${}^{148,149}$Sm
• Level densities and $\gamma$-ray strength functions in ${}^{170,171,172}$Yb
• Evolution of level density step structures from 56,57-Fe to 96,97-Mo

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