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Finite temperature nuclear response in the extended random phase approximation
Lacroix D., Chomaz P., Ayik S.
Physical Review C 58 (1998) 2154-2160 - http://hal.in2p3.fr/in2p3-00083986
Physique/Physique Nucléaire Théorique
Finite temperature nuclear response in the extended random phase approximation
D. Lacroix1, Ph. Chomaz1, S. Ayik
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
Bvd Henri Becquerel - BP 55027 - 14076 CAEN CEDEX 5
Physique théorique
The nuclear collective response at finite temperature is investigated for the first time in the quantum framework of the small amplitude limit of the extended time-dependent Hartree-Fock approach, including a non-Markovian collision term. It is shown that the collision width satisfies a secular equation. By employing a Skyrme force, the isoscalar monopole, isovector dipole, and isoscalar quadrupole excitations in 40Ca are calculated and important quantum features are pointed out. The collisional damping due to decay into incoherent two-particle–two-hole states is small at low temperatures but increases rapidly at higher temperatures.

Articles dans des revues avec comité de lecture
Physical Review C (Phys. Rev. C)
Publisher American Physical Society
ISSN 0556-2813 (eISSN : 1089-490X)

24.30.Cz, 21.60.Jz, 25.70.Lm
22 Latex pages including 9 figures. Phys. Rev. C (in press)
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