Fragmentation and damping of the collective response in extended random-phase approximation

Journal Article · Sat Jan 01 04:00:00 EST 2000 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.61.014608· OSTI ID:20215145

Ayik, Sakir ^[1]; Lacroix, Denis ^[2]; Chomaz, Philippe ^[2]

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1. Tennessee Technological University, Cookeville, Tennessee 38505 (United States)
2. GANIL, Boite Postale 5027, F-14021 Caen Cedex, (France)

The isoscalar monopole, isovector dipole, and isoscalar quadrupole excitations in {sup 40}Ca at zero and finite temperature are investigated in the quantal framework of the extended TDHF. Resonance excitations are broadened and shift down in energy due to coupling of collective modes with the 2p-2h doorway states, and the strength distributions exhibit fine structure. It is pointed out that a suitable finite range effective force is needed for a realistic description of the self-energies of the collective modes. (c) 1999 The American Physical Society.

• OSTI ID: 20215145
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 61; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40
COLLECTIVE EXCITATIONS
GIANT RESONANCE
NUCLEAR FRAGMENTATION
RANDOM PHASE APPROXIMATION
SELF-ENERGY
THEORETICAL DATA