Level study of {sup 14}C via neutron scattering to the unbound levels of {sup 13}C
Thesis/Dissertation
·
OSTI ID:39318
The purpose of this work is to measure the {sup 13}C differential neutron scattering cross section in order to provide a better understanding of the {sup 14}C level structure using R-Matrix analysis and shell model calculations. The experimental simulation code which was needed to extract cross sections from complex spectra is also presented. Using the beam-swinger and time-of-flight tunnel of the Ohio University Accelerator Laboratory, neutron scattering cross sections to the bound and unbound levels of {sup 13}C were measured for 8.7 {<=} E{sub n} {<=} 11.2 MeV. The data were corrected for air scattering, sample attenuation, sample contaminants, multiple scattering, secondary neutrons, and elastic and inelastic scattering from the sample of the neutron source continuum and contaminants. These were the first measurements of neutron scattering to the unbound levels of {sup 13}C. With all of the {sup 13}C + n channel measured, an estimation of the {sup 13}C(n, {alpha}){sup 10}Be cross section was made. The experimental data were modeled using R-Matrix analysis. Using the beam-swinger with the time-of-flight tunnel and the experimental simulation code, measurements of very small deep inelastic neutron scattering cross sections can now be performed. The results of R-Matrix analyses of scattering to the unbound levels of {sup 13}C revealed a 2{sup {minus}} or 3{sup {minus}} level at an E{sub x} of approximately 9 MeV in {sup 14}C and a 3{sup +} or 4{sup +} level at an E{sub x} of approximately 19 MeV in {sup 14}C.
- Research Organization:
- Ohio Univ., Athens, OH (United States)
- OSTI ID:
- 39318
- Country of Publication:
- United States
- Language:
- English
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