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Title: Enhanced α-particle optical potential at low energies, for the mass range A∼45-209

Abstract

An updated optical potential is thus provided for α-particles on nuclei within the mass number range 45≤A≤209, below the Coulomb barrier (B), on the basis of recent high-precision measurements of α-particle induced reaction data below B that made possible the understanding of actual limits and possible improvement of the α-particle optical-model potentials. The main revision concerns actually only the surface imaginary potential depth at the lowest α-particle energies well below B, and in fact only for the mass range above A∼130. A further regional point is the underestimation of reaction cross sections for the rare-earth nuclei by using the spherical optical potential unless a 7% larger value of the surface imaginary potential radius is taken into account. Involvement of this potential for further description of both the scattering and α-particles induced reactions is moreover discussed in the present work, of equal interest for nuclear astrophysics and nuclear technology for fusion devices.

Authors:
; ;  [1]
  1. Horia Hulubei National Institute for Physics and Nuclear Engineering, POBox MG-6, 077125 Magurele, Ilfov (Romania)
Publication Date:
OSTI Identifier:
22390966
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1645; Journal Issue: 1; Conference: Carpathian Summer School of Physics 2014, Sinaia (Romania), 13-26 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA PARTICLES; ALPHA REACTIONS; COULOMB FIELD; CROSS SECTIONS; MASS NUMBER; NUCLEAR POTENTIAL; OPTICAL MODELS; RARE EARTH NUCLEI; SPHERICAL CONFIGURATION

Citation Formats

Avrigeanu, V., Avrigeanu, M., and Mănăilescu, C.. Enhanced α-particle optical potential at low energies, for the mass range A∼45-209. United States: N. p., 2015. Web. doi:10.1063/1.4909569.
Avrigeanu, V., Avrigeanu, M., & Mănăilescu, C.. Enhanced α-particle optical potential at low energies, for the mass range A∼45-209. United States. doi:10.1063/1.4909569.
Avrigeanu, V., Avrigeanu, M., and Mănăilescu, C.. Tue . "Enhanced α-particle optical potential at low energies, for the mass range A∼45-209". United States. doi:10.1063/1.4909569.
@article{osti_22390966,
title = {Enhanced α-particle optical potential at low energies, for the mass range A∼45-209},
author = {Avrigeanu, V. and Avrigeanu, M. and Mănăilescu, C.},
abstractNote = {An updated optical potential is thus provided for α-particles on nuclei within the mass number range 45≤A≤209, below the Coulomb barrier (B), on the basis of recent high-precision measurements of α-particle induced reaction data below B that made possible the understanding of actual limits and possible improvement of the α-particle optical-model potentials. The main revision concerns actually only the surface imaginary potential depth at the lowest α-particle energies well below B, and in fact only for the mass range above A∼130. A further regional point is the underestimation of reaction cross sections for the rare-earth nuclei by using the spherical optical potential unless a 7% larger value of the surface imaginary potential radius is taken into account. Involvement of this potential for further description of both the scattering and α-particles induced reactions is moreover discussed in the present work, of equal interest for nuclear astrophysics and nuclear technology for fusion devices.},
doi = {10.1063/1.4909569},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1645,
place = {United States},
year = {Tue Feb 24 00:00:00 EST 2015},
month = {Tue Feb 24 00:00:00 EST 2015}
}