Nuclear Level Density at High Spin and Excitation Energy |
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Authors: | AN Behkami and Z Kargar |
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Institution: | Physics Department, Shiraz University, Shiraz 71454, Iran |
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Abstract: | The intensive studies of equilibrium processes in heavy-ion reaction
have produced a need for information on nuclear level densities at high
energies and spins. The Fermi gas level density is often used in
investigation of heavy-ion reaction studies. Some papers have claimed
that nuclear level densities might deviate substantially from the Fermi
gas predications at excitations related to heavy-ion reactions. The
formulae of calculation of the nuclear level density based on the theory of superconductivity are presented, special attention is paid to the dependence of the level density on the angular momentum. The spin-dependent nuclear level density is evaluated using the pairing interaction. The resulting level density for an average spin of 52 ħ is evaluated for
155Er and compared with experimental data. Excellent agreement between experiment and theory is obtained. |
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Keywords: | level density high spin and excitation energy |
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