Systematic study of the nuclear potential through high precision back-angle quasi-elastic scattering measurements

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.024612· OSTI ID:21061972

Gasques, L R; Evers, M; Hinde, D J; Dasgupta, M; Brown, M L; Rodriguez, M D; Thomas, R G ^[1]; Gomes, P R. S.; Anjos, R M ^[2]; Hagino, K ^[3]

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1. Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200 (Australia)
2. Instituto de Fisica, Universidade Federal Fluminense, Av. Litoranea s/n, 24210-340 Niteroi, Rio de Janeiro (Brazil)
3. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)

High precision quasi-elastic scattering excitation functions have been measured at energies well below the Coulomb barrier for the reactions of {sup 32}S with {sup 208}Pb, {sup 197}Au, {sup 186}W, and {sup 170}Er. Single-channel and coupled-channels calculations have been performed to extract the diffuseness parameter of the nuclear potential. For the reactions involving near-spherical targets, both theoretical analyses give the same diffuseness parameter. On the other hand, for deformed systems, couplings are important even at deep sub-barrier energies. In general, the effect of couplings is to reduce the diffuseness parameter value extracted from a single-channel potential. Single-channel fits to quasi-elastic scattering data result in a=0.72-0.82 fm, whereas coupled-channels calculations give diffuseness parameters in the range 0.58-0.75 fm.

• OSTI ID: 21061972
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COULOMB FIELD
COUPLED CHANNEL THEORY
DEFORMED NUCLEI
EXCITATION FUNCTIONS
GOLD 197 TARGET
LEAD 208 TARGET
NUCLEAR MODELS
NUCLEAR POTENTIAL
QUASI-ELASTIC SCATTERING
SULFUR 32 REACTIONS
TUNGSTEN 186 TARGET
YTTERBIUM 170 TARGET