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Systematic study of sub-barrier fusion enhancement in heavy-ion reactions

Abstract

A systematic study of the heavy-ion fusion-cross-section enhancement at sub-barrier energies is carried out. The asymptotic energy shift introduced in a previous paper as a measure of this enhancement is considered from a theoretical point of view. It is claimed that this energy shift is composed of two terms: One of them is related to the bulk properties of nuclear matter, and the other corresponds to deviations depending on the specific nuclear structure of the collision partners. We show that the former can be approximately described by the neck-formation model for fusion and the latter is frequently a consequence of static deformation or vibrational excitation of the projectile and/or the target. A comparison of the neck-formation effects with those arising from neutron flow suggests that there is a connection between these two mechanisms. (orig.).
Authors:
Aguiar, C E; Aleixo, A N; Barbosa, V C; Canto, L F; Donangelo, R [1] 
  1. Universidade Federal Rural do Rio de Janeiro (Brazil). Dept. de Fisica
Publication Date:
Aug 14, 1989
Product Type:
Journal Article
Reference Number:
NLN-89-004545; EDB-89-164354
Resource Relation:
Journal Name: Nuclear Physics (Section) A; (Netherlands); Journal Volume: 500:1
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; HEAVY ION FUSION REACTIONS; TOTAL CROSS SECTIONS; NICKEL 58 REACTIONS; NICKEL 58 TARGET; ARGON 40 REACTIONS; ASYMPTOTIC SOLUTIONS; ENERGY DEPENDENCE; EXCITATION FUNCTIONS; GERMANIUM 74 REACTIONS; GERMANIUM 74 TARGET; MEV RANGE 100-1000; NEUTRON TRANSFER; NICKEL 64 REACTIONS; NUCLEAR DEFORMATION; NUCLEAR MATTER; NUCLEAR STRUCTURE; ROTATIONAL STATES; SAMARIUM 144 TARGET; SAMARIUM 148 TARGET; SAMARIUM 154 TARGET; SPECTRAL SHIFT; STEADY-STATE CONDITIONS; THEORETICAL DATA; VIBRATIONAL STATES; CHARGED-PARTICLE REACTIONS; CROSS SECTIONS; DATA; DEFORMATION; ENERGY LEVELS; ENERGY RANGE; EXCITED STATES; FUNCTIONS; HEAVY ION REACTIONS; INFORMATION; MATTER; MEV RANGE; NUCLEAR REACTIONS; NUMERICAL DATA; TARGETS; 653003* - Nuclear Theory- Nuclear Reactions & Scattering
OSTI ID:
5552368
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0375-9474; CODEN: NUPAB
Submitting Site:
NLN
Size:
Pages: 195-211
Announcement Date:

Citation Formats

Aguiar, C E, Aleixo, A N, Barbosa, V C, Canto, L F, and Donangelo, R. Systematic study of sub-barrier fusion enhancement in heavy-ion reactions. Netherlands: N. p., 1989. Web. doi:10.1016/0375-9474(89)90137-1.
Aguiar, C E, Aleixo, A N, Barbosa, V C, Canto, L F, & Donangelo, R. Systematic study of sub-barrier fusion enhancement in heavy-ion reactions. Netherlands. doi:10.1016/0375-9474(89)90137-1.
Aguiar, C E, Aleixo, A N, Barbosa, V C, Canto, L F, and Donangelo, R. 1989. "Systematic study of sub-barrier fusion enhancement in heavy-ion reactions." Netherlands. doi:10.1016/0375-9474(89)90137-1. https://www.osti.gov/servlets/purl/10.1016/0375-9474(89)90137-1.
@misc{etde_5552368,
title = {Systematic study of sub-barrier fusion enhancement in heavy-ion reactions}
author = {Aguiar, C E, Aleixo, A N, Barbosa, V C, Canto, L F, and Donangelo, R}
abstractNote = {A systematic study of the heavy-ion fusion-cross-section enhancement at sub-barrier energies is carried out. The asymptotic energy shift introduced in a previous paper as a measure of this enhancement is considered from a theoretical point of view. It is claimed that this energy shift is composed of two terms: One of them is related to the bulk properties of nuclear matter, and the other corresponds to deviations depending on the specific nuclear structure of the collision partners. We show that the former can be approximately described by the neck-formation model for fusion and the latter is frequently a consequence of static deformation or vibrational excitation of the projectile and/or the target. A comparison of the neck-formation effects with those arising from neutron flow suggests that there is a connection between these two mechanisms. (orig.).}
doi = {10.1016/0375-9474(89)90137-1}
journal = {Nuclear Physics (Section) A; (Netherlands)}
volume = {500:1}
journal type = {AC}
place = {Netherlands}
year = {1989}
month = {Aug}
}