Signature of a pairing transition in the heat capacity of finite nuclei

Sep, 2000
13 pages
Published in:
  • Phys.Rev.Lett. 87 (2001) 022501
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Abstract:
The heat capacity of iron isotopes is calculated within the interacting shell model using the complete (pf+0g9/2)(pf+0g_{9/2})-shell. We identify a signature of the pairing transition in the heat capacity that is correlated with the suppression of the number of spin-zero neutron pairs as the temperature increases. Our results are obtained by a novel method that significantly reduces the statistical errors in the heat capacity calculated by the shell model Monte Carlo approach. The Monte Carlo results are compared with finite-temperature Fermi gas and BCS calculations.