Phys. Rev. C 50, R2671 - R2674 (1994)Pygmy dipole resonances in the calcium isotopes |
J. Chambers, E. Zaremba, and J. P. Adams
Department of Physics, Queen’s University, Kingston, Ontario, Canada K7L 3N6
B. Castel
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Received 3 August 1994
We present microscopic density functional theory calculations of the total dipole absorption cross sections of the even-A calcium isotopes from 40Ca through 48Ca. The results reveal the onset of a collective dipole oscillation occurring at low energy and decoupled from the giant dipole resonance. The radial density fluctuations associated with this low-lying mode have the character of the pygmy dipole resonance predicted to exist in neutron rich nuclei.
©1994 The American Physical Society
URL: http://link.aps.org/abstract/PRC/v50/pR2671
DOI: 10.1103/PhysRevC.50.R2671
PACS: 21.60.Jz, 25.30.Fj, 27.40.+z
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