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Title: Towards a Microscopic Reaction Description Based on Energy Density Functionals

Abstract

A microscopic calculation of reaction cross sections for nucleon-nucleus scattering has been performed by explicitly coupling the elastic channel to all particle-hole excitations in the target and one-nucleon pickup channels. The particle-hole states may be regarded as doorway states through which the flux flows to more complicated configurations, and subsequently to long-lived compound nucleus resonances. Target excitations for {sup 40,48}Ca, {sup 58}Ni, {sup 90}Zr and {sup 144}Sm were described in a random-phase framework using a Skyrme functional. Reaction cross sections obtained agree very well with experimental data and predictions of a state-of-the-art fitted optical potential. Couplings between inelastic states were found to be negligible, while the pickup channels contribute significantly. The effect of resonances from higher-order channels was assessed. Elastic angular distributions were also calculated within the same method, achieving good agreement with experimental data. For the first time observed absorptions are completely accounted for by explicit channel coupling, for incident energies between 10 and 70 MeV, with consistent angular distribution results.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1035965
Report Number(s):
LLNL-JRNL-501067
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1201273
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics)
Additional Journal Information:
Journal Volume: 84; Journal Issue: 6; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR DISTRIBUTION; CROSS SECTIONS; ENERGY DENSITY; FUNCTIONALS; SCATTERING; TARGETS

Citation Formats

Nobre, G A, DIetrich, F S, Escher, J E, Thompson, I J, Dupuis, M, Terasaki, J, and Engel, J. Towards a Microscopic Reaction Description Based on Energy Density Functionals. United States: N. p., 2011. Web.
Nobre, G A, DIetrich, F S, Escher, J E, Thompson, I J, Dupuis, M, Terasaki, J, & Engel, J. Towards a Microscopic Reaction Description Based on Energy Density Functionals. United States.
Nobre, G A, DIetrich, F S, Escher, J E, Thompson, I J, Dupuis, M, Terasaki, J, and Engel, J. Mon . "Towards a Microscopic Reaction Description Based on Energy Density Functionals". United States. https://www.osti.gov/servlets/purl/1035965.
@article{osti_1035965,
title = {Towards a Microscopic Reaction Description Based on Energy Density Functionals},
author = {Nobre, G A and DIetrich, F S and Escher, J E and Thompson, I J and Dupuis, M and Terasaki, J and Engel, J},
abstractNote = {A microscopic calculation of reaction cross sections for nucleon-nucleus scattering has been performed by explicitly coupling the elastic channel to all particle-hole excitations in the target and one-nucleon pickup channels. The particle-hole states may be regarded as doorway states through which the flux flows to more complicated configurations, and subsequently to long-lived compound nucleus resonances. Target excitations for {sup 40,48}Ca, {sup 58}Ni, {sup 90}Zr and {sup 144}Sm were described in a random-phase framework using a Skyrme functional. Reaction cross sections obtained agree very well with experimental data and predictions of a state-of-the-art fitted optical potential. Couplings between inelastic states were found to be negligible, while the pickup channels contribute significantly. The effect of resonances from higher-order channels was assessed. Elastic angular distributions were also calculated within the same method, achieving good agreement with experimental data. For the first time observed absorptions are completely accounted for by explicit channel coupling, for incident energies between 10 and 70 MeV, with consistent angular distribution results.},
doi = {},
journal = {Physical Review, C (Nuclear Physics)},
issn = {0556-2813},
number = 6,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}