Higher order processes in the radiative capture of fast neutrons

Micklinghoff, M.; Castel, B.

doi:10.1007/bf01881013

Cited by 6 publications

(2 citation statements)

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“…In the specific example of the 28Si(n, 7) reaction we have fixed all the parameters necessary for the reaction cross section by diagonalizing HQQ, defined in [4], yielding the spectrum of 29Si [10,11]. Both energy levels and E 1 transition rates are in excellent agreement with experiment up to neutron threshold.…”

Section: Shell-model Analysismentioning

confidence: 67%

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Fast neutron radiative capture in silicon

et al. 1984

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Using the 2SSi(n, 7)29Si reaction, transitions to the ground state and first excited state in 29Si have been studied in the neutron energy range 3-14 MeV with improved neutron energy resolution (of about 100 keV). The 90 ~ cross sections show considerable structure in the entire neutron energy range. Comparison with theoretical calculations shows that compound-nucleus and direct-semidirect processes account for the non-resonant part (smoothly varying part) of the cross section. A microscopic model is, however, required to describe the resonance structure. Continuum shell-model calculations have proven to be a very promising means towards a better understanding of the capture process in, and below, the giant resonance region in light nuclei. The angular distributions of gamma rays in the neutron energy range 8-14 MeV indicate that the capture reaction is mainly of direct character and that the effect of interference between the electric dipole and isoscalar quadrupole resonance is weak.

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Section: Shell-model Analysismentioning

confidence: 67%

“…In the method adopted here [4] the wave function in the interaction region is expanded by a finite number of harmonic oscillator functions. The outer region is represented by modified scattering functions which are defined by the demand that they be orthogonal to the harmonic oscillator (HO) predictions.…”

Section: Shell-model Analysismentioning

confidence: 99%