The elastic and inelastic scattering of 30.4 MeV protons by 54Fe

doi:10.1016/0375-9474(67)90336-3

Nuclear Physics A

Volume 99, Issue 2, 19 June 1967, Pages 203-212

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Abstract

Differential cross sections and polarizations are presented for the elastic scattering of 30.4 MeV protons by ⁵⁴Fe and for inelastic scattering to the 1.4a, 4.8 and 6.4 MeV states. The results for the 1.41 MeV state are compared with DWBA calculations. Unlike the cross sections, the predicted polarizations are in poor agrement with experiment when shell-model wave functions are used. A collective-model description gives fair agreement with experiment provided a sufficiently large deformation parameter is used for the spin-orbit potential.

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Cited by (11)

Local and global nucleon optical models from 1 keV to 200 MeV
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We present new phenomenological optical model potentials (OMPs) for neutrons and protons with incident energies from 1 keV up to 200 MeV, for (near-)spherical nuclides in the mass range 24⩽A⩽209. They are based on a smooth, unique functional form for the energy dependence of the potential depths, and on physically constrained geometry parameters. For the first time, this enables one to predict basic scattering observables over a broad mass range and over an energy range that covers several orders of magnitude in MeV. Thereby, the necessity of using different OMPs in different energy regions has been removed. Using extensive grid searches and a new computational steering technique, we have obtained optical model parameters for many isotopes separately. We recommend that the resulting, so-called local, optical models be used in theoretical analyses of nuclear data. From these parameterizations, we have also constructed asymmetry-dependent neutron and proton global OMPs that are superior to all other existing phenomenological ones, not only with respect to the description of observables, but also as they cover larger mass and energy ranges. These (nucleon) global OMPs, we believe, may be used with some confidence in other studies whenever one of our local OMPs does not exist. To constrain our parameterization as much as possible and to assess the performance of our OMPs, we have compared our calculated results with an extensive experimental data set. This data set includes average resonance parameters, total and non-elastic cross sections, elastic scattering angular distributions and analyzing powers. The numerous local OMPs we have obtained allow us to disentangle asymmetry, Coulomb correction and mass-dependent components of our global OMPs.
Nuclear data sheets for A = 54
1978, Nuclear Data Sheets
Nuclear structure data available through December 1977 are compiled, and adopted level properties are given. The bulk of the data is presented pictorially for easy comparison. Experimental details, references, and additional comments, where required, are given in the text. All drawings, tables, and comments are reproduced from the computerized Evaluated Nuclear Structure Data File (ENSDF). Any additions or corrections desired by the users should be addressed to the evaluators for maintenance and updating of the computer file.
Evidence for two-step processes in reactions with spherical nuclei
1973, Physics Letters B
Elastic and inelastic scattering of 30.4 MeV polarised protons by 12, 13C, 16O and 54Fe
1972, Nuclear Physics, Section A
Cross sections, polarisations and analysing powers are presented for the elastic and inelastic scattering of 30.4 MeV polarised protons by ¹²C(Q = 0.0, − 4.44, −7.65, −9.64 MeV), ¹³C(Q = 0.0, −3.09 MeV), ¹⁶O (Q = 0.0, −8.87 MeV) and ⁵⁴Fe (Q = 0.0, −1.41 MeV). Conventional optical model analyses of the elastic scattering are presented. The inelastic scattering data are analysed using a microscopic model employing shell-model wave functions, together with an effective interaction; also, a macroscopic collective model is applied where appropriate.
The effective interactions derived from the microscopic model show a qualitative similarity to one another, each resembling a Serber force with an enhanced spin-independent part and a strong, attractive tensor part. A calculation using an interaction derived from a realistic force is also given for certain transitions. Acceptable agreement is obtained for the ¹⁶O and ¹³C states but not for the ¹²C 7.65 MeV state.
Differential cross sections, polarisations and proton-gamma angular correlations for 54Fe, 60Ni(p, p) and (p, p′γ) at 10 MeV
1970, Nuclear Physics, Section A
Data are presented for the differential cross sections and polarisations for ⁵⁴Fe(p,p) and ⁶⁰Ni(p, p) and for the cross sections, proton asymmetries and the spin-flip angular correlation for ⁵⁴Fe(p, p'γ) and ⁶⁰Ni(p, p'γ) (first excited states). The incident energy is 10 MeV in each case. The cross section and angular correlation results are compared with the predictions of a simple model involving direct and compound nucleus contributions, permitting an estimate of the magnitude of the direct component to be made. The inelastic asymmetry data are not well described by this model.
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^†: Present address: Department of Nuclear Physics, Australian National University, Canberra, Australia.

^††: Present address: Physics Division, AAEC, Lucas Heights, N.S.W., Australia.

^†††: Present address: Physics Department, University of Minnesota, Minneapolis, Minnesota 55455, USA.

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Nuclear Physics A

Abstract

References (12)

Nuclear Physics

Phys. Lett.

Nuclear Physics

Nuclear Physics

Phys. Lett.

Nuclear Physics

Cited by (11)

Local and global nucleon optical models from 1 keV to 200 MeV

Nuclear data sheets for A = 54

Evidence for two-step processes in reactions with spherical nuclei

Elastic and inelastic scattering of 30.4 MeV polarised protons by <sup>12, 13</sup>C, <sup>16</sup>O and <sup>54</sup>Fe

Differential cross sections, polarisations and proton-gamma angular correlations for <sup>54</sup>Fe, <sup>60</sup>Ni(p, p) and (p, p′γ) at 10 MeV

Asymmetry dependence of nucleon correlations in spherical nuclei extracted from a dispersive-optical-model analysis