Nuclear Schiff moment in nuclei with soft octupole and quadrupole vibrations

Journal Article · Tue Aug 15 04:00:00 EDT 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.025502· OSTI ID:20863747

Auerbach, N ^[1]; Dmitriev, V F; Sen'kov, R A ^[2]; Flambaum, V V ^[3]; Lisetskiy, A ^[4]; Zelevinsky, V G ^[5]

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1. School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel)
2. Budker Institute of Nuclear Physics, Novosibirsk Ru-630090 (Russian Federation)
3. School of Physics, University of New South Wales, Sydney 2052 (Australia)
4. GSI, Theory Department, D-64291 Darmstadt (Germany)
5. National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1321 (United States)

Nuclear forces violating parity and time reversal invariance (P,T-odd) produce P,T-odd nuclear moments, for example, the nuclear Schiff moment. In turn, this moment can induce the electric dipole moment in the atom. The nuclear Schiff moment is predicted to be enhanced in nuclei with static quadru pole and octupole deformation. The analogous suggestion of the enhanced contribution to the Schiff moment from the soft collective quadrupole and octupole vibrations in spherical nuclei is tested in this article in the framework of the quasiparticle random phase approximation with separable quadrupole and octupole forces applied to the odd {sup 217-221}Ra and {sup 217-221}Rn isotopes. In this framework, we confirm the existence of the enhancement effect due to the soft modes, but only in the limit when the frequencies of quadrupole and octupole vibrations are close to zero. According to the QRPA, in realistic cases the enhancement in spherical nuclei is strongly reduced by a small weight of the corresponding ''particle + phonon'' component in a complicated wave function of a soft nucleus. The perspectives of a better description of the structure of heavy soft nuclei are discussed.

• OSTI ID: 20863747
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 74; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOMS
ELECTRIC DIPOLE MOMENTS
NUCLEAR DEFORMATION
NUCLEAR FORCES
OCTUPOLES
PARITY
PHONONS
QUADRUPOLES
RADIUM 221
RADON 221
RANDOM PHASE APPROXIMATION
SPHERICAL CONFIGURATION
T INVARIANCE
WAVE FUNCTIONS