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Shell and isotopic effects in neutron interaction with nuclei. [Optical model and nucleus asymmetry correlations]

Journal Article:

Abstract

Major results of investigations into the shell structure of deformed nuclei with the number of neutrons of approximately 100, as well as new isotopic effects in the inelastic scattering of fast neutrons with nuclei are reported. The experiments conducted at the WWR-M research reactor have shown a substantial dependence of the nuclear excited energy-level density on the mass number and the number of neutrons. The fact resulted in a conclusion that the deformed nuclei possess filled shells, that was an incentive to revise the whole nuclear shell concept. In particular it was established that the property of magicity rests not only on the sphericity of nuclei but it may be also observed in strongly deformed nuclei. The isotope-spin dependence of the nuclear potential was studied at the AG-5 pulse electrostatic generator. The parameters of the potential were determined by comparing the experimental data on inelastic scattering and polarization of fast neutrons by nuclei from /sup 48/Ti to /sup 209/Bi with the calculations in terms of the optical model. Simple correlations were established between the optical potential and the nucleus asymmetry parameter ..cap alpha..=N-Z/A in wide ranges of mass numbers and neutron energy.
Authors:
Publication Date:
Jan 01, 1978
Product Type:
Journal Article
Reference Number:
AIX-10-440234; EDB-79-127796
Resource Relation:
Journal Name: At. Energ. (USSR); (USSR); Journal Volume: 44:1
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DEFORMED NUCLEI; ENERGY-LEVEL DENSITY; OPTICAL MODELS; HEAVY NUCLEI; NEUTRON REACTIONS; INTERMEDIATE MASS NUCLEI; INELASTIC SCATTERING; EXCITED STATES; FAST NEUTRONS; MAGIC NUCLEI; MASS NUMBER; NUCLEAR POTENTIAL; NUCLEAR STRUCTURE; SHELL MODELS; SPIN ORIENTATION; TARGETS; BARYON REACTIONS; BARYONS; ELEMENTARY PARTICLES; ENERGY LEVELS; FERMIONS; HADRON REACTIONS; HADRONS; MATHEMATICAL MODELS; NEUTRONS; NUCLEAR MODELS; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; NUCLEONS; ORIENTATION; POTENTIALS; SCATTERING; 653003* - Nuclear Theory- Nuclear Reactions & Scattering; 653001 - Nuclear Theory- Nuclear Structure, Moments, Spin, & Models; 651525 - Nuclear Properties & Reactions, A=39-58, Experimental- Nuclear Reactions & Scattering- (-1987); 651625 - Nuclear Properties & Reactions, A=59-89, Experimental- Nuclear Reactions & Scattering- (-1987); 651725 - Nuclear Properties & Reactions, A=90-149, Experimental- Nuclear Reactions & Scattering- (-1987); 651825 - Nuclear Properties & Reactions, A=150-189, Experimental- Nuclear Reactions & Scattering- (-1987); 651925 - Nuclear Properties & Reactions, A=190-219, Experimental- Nuclear Reactions & Scattering- (-1987); 652025 - Nuclear Properties & Reactions, A=220 & above, Experimental- Nuclear Reactions & Scattering- (-1987)
OSTI ID:
5973612
Country of Origin:
USSR
Language:
Russian
Other Identifying Numbers:
Journal ID: CODEN: AENGA
Submitting Site:
INIS
Size:
Pages: 70-73
Announcement Date:

Journal Article:

Citation Formats

Pasechnik, M V. Shell and isotopic effects in neutron interaction with nuclei. [Optical model and nucleus asymmetry correlations]. USSR: N. p., 1978. Web.
Pasechnik, M V. Shell and isotopic effects in neutron interaction with nuclei. [Optical model and nucleus asymmetry correlations]. USSR.
Pasechnik, M V. 1978. "Shell and isotopic effects in neutron interaction with nuclei. [Optical model and nucleus asymmetry correlations]." USSR.
@misc{etde_5973612,
title = {Shell and isotopic effects in neutron interaction with nuclei. [Optical model and nucleus asymmetry correlations]}
author = {Pasechnik, M V}
abstractNote = {Major results of investigations into the shell structure of deformed nuclei with the number of neutrons of approximately 100, as well as new isotopic effects in the inelastic scattering of fast neutrons with nuclei are reported. The experiments conducted at the WWR-M research reactor have shown a substantial dependence of the nuclear excited energy-level density on the mass number and the number of neutrons. The fact resulted in a conclusion that the deformed nuclei possess filled shells, that was an incentive to revise the whole nuclear shell concept. In particular it was established that the property of magicity rests not only on the sphericity of nuclei but it may be also observed in strongly deformed nuclei. The isotope-spin dependence of the nuclear potential was studied at the AG-5 pulse electrostatic generator. The parameters of the potential were determined by comparing the experimental data on inelastic scattering and polarization of fast neutrons by nuclei from /sup 48/Ti to /sup 209/Bi with the calculations in terms of the optical model. Simple correlations were established between the optical potential and the nucleus asymmetry parameter ..cap alpha..=N-Z/A in wide ranges of mass numbers and neutron energy.}
journal = {At. Energ. (USSR); (USSR)}
volume = {44:1}
journal type = {AC}
place = {USSR}
year = {1978}
month = {Jan}
}