Abstract
Practical as well as more fundamental interest in low-energy n-{sup 12}C elastic scattering motivated the execution of comprehensive polarization studies between 1.062 and 2.243 MeV. Seven complete polarization angular distributions were obtained from experimental finite-geometry left-right ratios at each energy observed at six or seven laboratory scattering angles between 30 and 129 deg, using polarized fast-neutrons emitted at {theta}{sub i} 50 (lab. syst.) from the {sup 7}Li(p, n) {sup 7}Be-reaction. Proper corrections were applied for finite geometry and polarized multiple-scattering effects as well as for the presence of the first-excited state group of fast-neutrons in the incident beams. The magnitude of the polarization effects are sufficiently large to ensure the potentialities of {sup 12}C as an acceptable fast-neutron polarization analyser in the energy range under consideration. Furthermore, on the basis of the above-mentioned polarization data as well as on the basis of total and differential scattering cross section data available in current literature reliable phase shifts were determined. These phase shifts are only in partial agreement with the ones of Wills, Jr. et al. , and in definite disagreement with the extrapolated phases of Meier, Scherrer, and Trumpy. Their energy variations will be predicted in the theoretical part of this
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Citation Formats
Aspelund, O.
Polarized Elastic Fast-Neutron Scattering off {sup 12}C in the Lower MeV-Range. I. Experimental Part.
Sweden: N. p.,
1967.
Web.
Aspelund, O.
Polarized Elastic Fast-Neutron Scattering off {sup 12}C in the Lower MeV-Range. I. Experimental Part.
Sweden.
Aspelund, O.
1967.
"Polarized Elastic Fast-Neutron Scattering off {sup 12}C in the Lower MeV-Range. I. Experimental Part."
Sweden.
@misc{etde_20956315,
title = {Polarized Elastic Fast-Neutron Scattering off {sup 12}C in the Lower MeV-Range. I. Experimental Part}
author = {Aspelund, O}
abstractNote = {Practical as well as more fundamental interest in low-energy n-{sup 12}C elastic scattering motivated the execution of comprehensive polarization studies between 1.062 and 2.243 MeV. Seven complete polarization angular distributions were obtained from experimental finite-geometry left-right ratios at each energy observed at six or seven laboratory scattering angles between 30 and 129 deg, using polarized fast-neutrons emitted at {theta}{sub i} 50 (lab. syst.) from the {sup 7}Li(p, n) {sup 7}Be-reaction. Proper corrections were applied for finite geometry and polarized multiple-scattering effects as well as for the presence of the first-excited state group of fast-neutrons in the incident beams. The magnitude of the polarization effects are sufficiently large to ensure the potentialities of {sup 12}C as an acceptable fast-neutron polarization analyser in the energy range under consideration. Furthermore, on the basis of the above-mentioned polarization data as well as on the basis of total and differential scattering cross section data available in current literature reliable phase shifts were determined. These phase shifts are only in partial agreement with the ones of Wills, Jr. et al. , and in definite disagreement with the extrapolated phases of Meier, Scherrer, and Trumpy. Their energy variations will be predicted in the theoretical part of this contribution.}
place = {Sweden}
year = {1967}
month = {May}
}
title = {Polarized Elastic Fast-Neutron Scattering off {sup 12}C in the Lower MeV-Range. I. Experimental Part}
author = {Aspelund, O}
abstractNote = {Practical as well as more fundamental interest in low-energy n-{sup 12}C elastic scattering motivated the execution of comprehensive polarization studies between 1.062 and 2.243 MeV. Seven complete polarization angular distributions were obtained from experimental finite-geometry left-right ratios at each energy observed at six or seven laboratory scattering angles between 30 and 129 deg, using polarized fast-neutrons emitted at {theta}{sub i} 50 (lab. syst.) from the {sup 7}Li(p, n) {sup 7}Be-reaction. Proper corrections were applied for finite geometry and polarized multiple-scattering effects as well as for the presence of the first-excited state group of fast-neutrons in the incident beams. The magnitude of the polarization effects are sufficiently large to ensure the potentialities of {sup 12}C as an acceptable fast-neutron polarization analyser in the energy range under consideration. Furthermore, on the basis of the above-mentioned polarization data as well as on the basis of total and differential scattering cross section data available in current literature reliable phase shifts were determined. These phase shifts are only in partial agreement with the ones of Wills, Jr. et al. , and in definite disagreement with the extrapolated phases of Meier, Scherrer, and Trumpy. Their energy variations will be predicted in the theoretical part of this contribution.}
place = {Sweden}
year = {1967}
month = {May}
}