Journal
PHYSICAL REVIEW C
Volume 78, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.78.051301
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Funding
- Romanian National Authority for Scientific Research [ID-117/01.10.2007]
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The spin-cutoff parameter sigma has been determined for experimental spin distributions at low excitation energies of 310 nuclei between F-18 and Cf-251 (more than 8000 levels with their spin). The results indicate a weak dependence on the mass number A of the spin-cutoff parameter sigma(2)A(0.28), and an even-odd spin staggering in the spin distribution of the even-even nuclei, with a strong enhancement of the number of states with spin zero. A modification of the spin-cutoff distribution formula is proposed in order to describe the even-even nuclei data. These findings are in good agreement with recent predictions of shell-model Monte Carlo calculations.
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