Experimental investigation on the temperature dependence of the nuclear level density parameter

Abstract

The effect of temperature (T) and angular momentum (J) on the inverse level density parameter (k) has been studied by populating the compound nucleus ${}^{97}$Tc in the reaction ${}^4$He + ${}^{93}$Nb at four incident beam energies of 28, 35, 42 and 50 MeV. For all the four energies, the value of k decreases with increasing J. The T dependence of k has been compared for two angular momentum windows with different theoretical predictions as well as with FTBCS1 calculation which takes into account the quasiparticle-number fluctuations in the pairing field. Interestingly, the experimental data are in good agreement with the theoretical calculations at higher J but deviate from all the calculations at lower J.

arXiv comment5 Figures and 5 pages

References in corpus (6)

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• Observation of Thermodynamical Properties in the ${}^{162}$Dy, ${}^{166}$Er and ${}^{172}$Yb Nuclei
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Cited by in corpus (4)

• Nuclear level density of ${}^{69}$Zn from gamma gated particle spectrum and its implication on ${}^{68}$Zn(n, $\gamma$)${}^{69}$Zn capture cross-section
• Excitation energy and angular momentum dependence of the nuclear level density parameter around A$\approx$110
• Dependence of spin induced structural transitions on level density and Neutron emission spectra
• Impact of the quenching of shell effects with excitation energy on Nuclear Level Density