Nuclear-level density of {sup 113}Sn, {sup 114}Sn, {sup 115}Sn, and {sup 116}Sn from an analysis of neutron spectra in the reactions {sup 115}In(p,xn), {sup 115}In(d,xn), and {sup 113}Cd({alpha},xn)

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Physics of Atomic Nuclei

OSTI ID:88739

Zhuravlev, B V; Dovbenko, A G ^[1]

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1. Institute of Physics and Energetics, Obninsk (Russian Federation)

The differential cross sections for neutron emission in the reactions {sup 115}In(p,xn), {sup 115}In(d,xn), and {sup 113}Cd({alpha},xn) are measured and analyzed for proton energies 11.2 and 22.2 MeV, deuteron energy 22.3 MeV, and {alpha}-particle energies 26.8 and 45.2 MeV, respectively. The parameters of the nuclear-level density in the Fermi-gas model with negative energy shift are determined for the {sup 113}Sn, {sup 114}Sn, {sup 115}Sn, and {sup 116}Sn nuclei over a wide range of excitation energies. Analysis is performed in a statistical model that uses the Hauser-Feshbach mathematical formalism to describe multistage processes. It is shown that, as excitation energy increases, the parameter of the level density for these nuclei first decreases (this behavior is consistent with the predictions of the generalized model of a superfluid nucleus) and then increases (this points to the destruction of the nuclear-shell structure). 20 refs., 6 figs., 2 tabs.

• OSTI ID: 88739
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 2 Vol. 58; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA REACTIONS
CADMIUM 113 TARGET
DEUTERON REACTIONS
DIFFERENTIAL CROSS SECTIONS
FERMI GAS MODEL
INDIUM 115 TARGET
MEV RANGE 10-100
NEUTRON EMISSION
PROTON REACTIONS
TIN 113
TIN 114
TIN 115
TIN 116