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Title: Semi-classical shears and effective forces

Abstract

We present a semi-classical analysis of the B(M1) and B(E2) transition probabilities in the shears bands in {sup 193-199}Pb as a function of the shears angle. This provides a semi-empirical confirmation of the shears mechanism proposed by S. Frauendorf using the Tilted-Axis-Cranking model. We interpret this as a consequence of a residual interaction between the proton and neutron blades, and it is shown that the main ingredient of this effective force can be described by a P{sub 2}({theta}) term with a strength of 400-600 keV. Such an interaction can be mediated through the core by particle-vibration coupling. The competition between the shears and the rotation of the core is investigated within the framework of a classical solution of two particles-plus-rotor model. (c) 1999 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
Publication Date:
OSTI Identifier:
20216653
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 481; Journal Issue: 1; Other Information: PBD: 2 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; LEAD ISOTOPES; M1-TRANSITIONS; E2-TRANSITIONS; CRANKING MODEL; NUCLEAR DEFORMATION; ANGULAR MOMENTUM; NUCLEAR POTENTIAL; THEORETICAL DATA

Citation Formats

Macchiavelli, A. O., Clark, R. M., Deleplanque, M. A., Diamond, R. M., Fallon, P., Lee, I. Y., Stephens, F. S., and Vetter, K. Semi-classical shears and effective forces. United States: N. p., 1999. Web. doi:10.1063/1.59563.
Macchiavelli, A. O., Clark, R. M., Deleplanque, M. A., Diamond, R. M., Fallon, P., Lee, I. Y., Stephens, F. S., & Vetter, K. Semi-classical shears and effective forces. United States. doi:10.1063/1.59563.
Macchiavelli, A. O., Clark, R. M., Deleplanque, M. A., Diamond, R. M., Fallon, P., Lee, I. Y., Stephens, F. S., and Vetter, K. Thu . "Semi-classical shears and effective forces". United States. doi:10.1063/1.59563.
@article{osti_20216653,
title = {Semi-classical shears and effective forces},
author = {Macchiavelli, A. O. and Clark, R. M. and Deleplanque, M. A. and Diamond, R. M. and Fallon, P. and Lee, I. Y. and Stephens, F. S. and Vetter, K.},
abstractNote = {We present a semi-classical analysis of the B(M1) and B(E2) transition probabilities in the shears bands in {sup 193-199}Pb as a function of the shears angle. This provides a semi-empirical confirmation of the shears mechanism proposed by S. Frauendorf using the Tilted-Axis-Cranking model. We interpret this as a consequence of a residual interaction between the proton and neutron blades, and it is shown that the main ingredient of this effective force can be described by a P{sub 2}({theta}) term with a strength of 400-600 keV. Such an interaction can be mediated through the core by particle-vibration coupling. The competition between the shears and the rotation of the core is investigated within the framework of a classical solution of two particles-plus-rotor model. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59563},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 481,
place = {United States},
year = {1999},
month = {9}
}