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Phys. Rev. C 70, 031601 (2004) [5 pages]

Interplay of initial deformation and Coulomb proximity on nuclear decay

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S. Hudan, R. Alfaro, L. Beaulieu, B. Davin, Y. Larochelle, T. Lefort, V. E. Viola, H. Xu, R. Yanez, and R. T. de Souza
Department of Chemistry and Indiana University Cyclotron Facility, Indiana University, Bloomington, Indiana 47405, USA

R. J. Charity and L. G. Sobotka
Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA

T. X. Liu, X. D. Liu, W. G. Lynch, R. Shomin, W. P. Tan, M. B. Tsang, A. Vander Molen, A. Wagner, and H. F. Xi
National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

Rapid Communication Received 14 May 2004; published 21 September 2004

Alpha particles emitted from an excited projectilelike fragment (PLF*) formed in a peripheral collision of two intermediate-energy heavy ions exhibit a strong preference for emission towards the targetlike fragment. The interplay of the initial deformation of the PLF* caused by the reaction, Coulomb proximity, and the rotation of the PLF* results in the observed anisotropic angular distribution. Changes in the shape of the angular distribution with excitation energy are interpreted as being the result of forming more elongated initial geometries in the more peripheral collisions.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.70.031601
DOI: 10.1103/PhysRevC.70.031601
PACS: 25.70.Mn

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