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Fermi motion and medium effects on reaction cross sections of 13,14,15B + C, Al at intermediate and high energies.

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Title: Fermi motion and medium effects on reaction cross sections of 13,14,15B + C, Al at intermediate and high energies.
Authors: Rashdan, M.1 (AUTHOR) mrashdan2@hotmail.com, Abdel-Karim, T. A.2 (AUTHOR)
Source: Modern Physics Letters A. 12/10/2020, Vol. 35 Issue 36, pN.PAG-N.PAG. 14p.
Subjects: Boron isotopes, Harmonic oscillators, Motion, Boron, Neutrons
Abstract: Analysis of reaction cross sections of 1 3 , 1 4 , 1 5 B + C , Al are performed with Glauber model (GM) including medium modifications arising from Fermi motion and in-medium nucleon–nucleon (NN) total reaction cross section. The density distributions of Boron isotopes are described by a deformed-average Fermi shape, whose proton and neutron radii and deformation parameters are derived from relativistic mean field (RMF), harmonic oscillator (HO) and two-parameter Fermi (2pF). These densities can describe the reaction cross section of Boron isotopes except for 1 4 B which is better described by an HO core plus extended Gaussian (HOG) or HO plus a modified Yukawa (HOMY) tail, which depends on the 1n separation energy. It is found that Fermi motion effects dominated at intermediate energy, and they are important to describe the data in addition to in-medium effects. In-medium effects, which are incorporated locally, reduced the reaction cross section by about 3–5% at all energies. 1 4 B is confirmed as a one-neutron halo nucleus, where a large extended tail is observed in the extracted HOMY and HOG model densities as well as in the extracted radii, where the matter radius of 1 4 B is found to be about 2.92 fm, which is larger than that of 1 3 B (2.5 fm) and 1 5 B (2.82 fm) predicted using the GM model including Fermi motion and in-medium effects. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Analysis of reaction cross sections of 1 3 , 1 4 , 1 5 B + C , Al are performed with Glauber model (GM) including medium modifications arising from Fermi motion and in-medium nucleon–nucleon (NN) total reaction cross section. The density distributions of Boron isotopes are described by a deformed-average Fermi shape, whose proton and neutron radii and deformation parameters are derived from relativistic mean field (RMF), harmonic oscillator (HO) and two-parameter Fermi (2pF). These densities can describe the reaction cross section of Boron isotopes except for 1 4 B which is better described by an HO core plus extended Gaussian (HOG) or HO plus a modified Yukawa (HOMY) tail, which depends on the 1n separation energy. It is found that Fermi motion effects dominated at intermediate energy, and they are important to describe the data in addition to in-medium effects. In-medium effects, which are incorporated locally, reduced the reaction cross section by about 3–5% at all energies. 1 4 B is confirmed as a one-neutron halo nucleus, where a large extended tail is observed in the extracted HOMY and HOG model densities as well as in the extracted radii, where the matter radius of 1 4 B is found to be about 2.92 fm, which is larger than that of 1 3 B (2.5 fm) and 1 5 B (2.82 fm) predicted using the GM model including Fermi motion and in-medium effects. [ABSTRACT FROM AUTHOR]
ISSN:02177323
DOI:10.1142/S0217732320502971