Small damping approach in Fermi-liquid theory

• Autorzy: Volodymyr Kolomietz , Sergiy Lukyanov , Shalom Shlomo
• Języki publikacji: EN

Abstrakty

EN

The validity of the small damping approximation (SDA) for the quasi-classical description of the averaged properties of nuclei at high temperatures is studied within the framework of collisional kinetic theory. The isoscalar collective quadrupole vibrations in hot nuclei are considered. We show that the extension of the SDA, by accounting for the damping of the distribution function δ f in the collision integral, reduces the rate of variation of distortion effects of the Fermi surface with temperature. The damping of the δ f in the collision integral increases the collisional width of the giant quadrupole resonance (GQR) significantly for small enough values of the relaxation time. The temperature dependence of the eigenenergy of the GQR becomes much weaker than in the corresponding SDA case.

Słowa kluczowe

EN

Kinetic theory; collision integral; Fermi liquid; small damping approximation; giant quadrupole resonance; 21.60.Ev; 24.30.Cz

• Czasopismo: Open Physics
• Rocznik: 2006
• Tom: 4
• Numer: 3
• Strony: 393-404

Daty

wydano

2006-09-01

online

2006-09-01

Twórcy

autor

Volodymyr Kolomietz

• Institute for Nuclear Research, 03680, Kyiv, Ukraine,

autor

Sergiy Lukyanov

• Institute for Nuclear Research, 03680, Kyiv, Ukraine,

autor

Shalom Shlomo

• Cyclotron Institute, Texas A&M University, College Station, Texas, 77843, USA,

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Identyfikatory

DOI

10.2478/s11534-006-0022-1