Collisional damping in heated nuclei within the Landau-Vlasov kinetic theory
- Institute for Nuclear Research, Prospekt Nauki 47, 252028 Kiev (Ukraine)
Collisional damping of nuclear collective vibrations is studied within the framework of the Vlasov-Landau equation including retardation (memory) effects in the collision integral. Expressions for the nuclear two-body viscosity and the collisional width {Gamma} of the giant multipole resonances in heated nuclei are obtained in the case of the quadrupole dynamic distortion of the Fermi surface. An improved formula for {Gamma} is also proposed in which all multipolarities of the distortion of the Fermi sphere are taken into account. The collisional width of the giant dipole resonance is calculated as a function of excitation energy for the Sn nuclei region using this formula. It shows a weak variation with temperature. In the temperature range of {ital T}{approx}2.5--7 MeV, the contribution of collisional damping to GDR width does not exceed 50% of the experimental values.
- DOE Contract Number:
- FG03-93ER40773
- OSTI ID:
- 122381
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 52; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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