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Title: Folding description of the fine structure of {alpha} decay to 2{sup +} vibrational and transitional states

Abstract

We analyze {alpha}-decays to ground and 2{sup +} vibrational states in even-even nuclei by using a coupled channels formalism. The {alpha}-nucleus interaction is simulated by a double folding procedure using M3Y plus Coulomb two-body forces. Collective excitations are described by vibrations of the nuclear surface. We use a repulsive potential, with one independent parameter, in order to simulate Pauli principle and to adjust the energy of the resonant state to the experimental Q-value. The decaying state is identified with the zero nodes resonance inside the resulting pocket-like potential. We have found that the fine structure is very sensitive to the strength of the repulsive core and the vibrational parameter of the {alpha}-nucleus potential. A satisfactory agreement with existing experimental data was obtained by using the vibrational strength as a free parameter. It turns out that the inverse of this parameter is proportional to the logarithm of the hindrance factor squared. Based on this fact we have made predictions for 15 vibrational {alpha}-emitters.

Authors:
;  [1];  [2]
  1. Department of Physics, University of Jyvaeskylae, POB 35, FIN-40351, Jyvaeskylae (Finland)
  2. 'Horia Hulubei' National Institute of Physics and Nuclear Engineering, 407 Atomistilor, Magurele-Bucharest 077125 (Romania)
Publication Date:
OSTI Identifier:
20995263
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.75.054301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA DECAY; COLLECTIVE EXCITATIONS; COUPLED CHANNEL THEORY; EVEN-EVEN NUCLEI; FINE STRUCTURE; PAULI PRINCIPLE; POTENTIALS; Q-VALUE; TWO-BODY PROBLEM; VIBRATIONAL STATES

Citation Formats

Peltonen, S., Suhonen, J., and Delion, D. S. Folding description of the fine structure of {alpha} decay to 2{sup +} vibrational and transitional states. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.054301.
Peltonen, S., Suhonen, J., & Delion, D. S. Folding description of the fine structure of {alpha} decay to 2{sup +} vibrational and transitional states. United States. doi:10.1103/PHYSREVC.75.054301.
Peltonen, S., Suhonen, J., and Delion, D. S. Tue . "Folding description of the fine structure of {alpha} decay to 2{sup +} vibrational and transitional states". United States. doi:10.1103/PHYSREVC.75.054301.
@article{osti_20995263,
title = {Folding description of the fine structure of {alpha} decay to 2{sup +} vibrational and transitional states},
author = {Peltonen, S. and Suhonen, J. and Delion, D. S.},
abstractNote = {We analyze {alpha}-decays to ground and 2{sup +} vibrational states in even-even nuclei by using a coupled channels formalism. The {alpha}-nucleus interaction is simulated by a double folding procedure using M3Y plus Coulomb two-body forces. Collective excitations are described by vibrations of the nuclear surface. We use a repulsive potential, with one independent parameter, in order to simulate Pauli principle and to adjust the energy of the resonant state to the experimental Q-value. The decaying state is identified with the zero nodes resonance inside the resulting pocket-like potential. We have found that the fine structure is very sensitive to the strength of the repulsive core and the vibrational parameter of the {alpha}-nucleus potential. A satisfactory agreement with existing experimental data was obtained by using the vibrational strength as a free parameter. It turns out that the inverse of this parameter is proportional to the logarithm of the hindrance factor squared. Based on this fact we have made predictions for 15 vibrational {alpha}-emitters.},
doi = {10.1103/PHYSREVC.75.054301},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}