The Cupola: Scholarship at Gettysburg College

Title

Parity Nonconservation in Neutron Resonances in 238U

Authors

Bret E. Crawford, Gettysburg CollegeFollow
J D. Bowman, Los Alamos National LaboratoryFollow
P P J. Delheij, TRIUMFFollow
C M. Frankle, Los Alamos National LaboratoryFollow
M IInuma, Kyoto UniversityFollow
J N. Knudsen, Los Alamos National LaboratoryFollow
L Y. Lowie, North Carolina State UniversityFollow
A Masaike, Kyoto UniversityFollow
Y Matsuda, Kyoto UniversityFollow
G E. Mitchell, North Carolina State UniversityFollow
S I. Penttila, Los Alamos National LaboratoryFollow
H Postma, Delft University of TechnologyFollow
N R. Roberson, Duke UniversityFollow
S J. Seestrom, Los Alamos National LaboratoryFollow
E I. Sharapov, Joint Institute for Nuclear ResearchFollow
Sharon L. Stephenson, Gettysburg CollegeFollow
Y-F Yen, Los Alamos National LaboratoryFollow
V W. Yuan, Los Alamos National LaboratoryFollow

Document Type

Article

Publication Date

8-1998

Department 1

Physics

Abstract

Parity nonconservation (PNC) was studied for 24 p-wave neutron resonances in ²³⁸U from 10 to 300 eV by measuring the helicity dependence of the total neutron cross section with an improved experimental apparatus. Six resonances show statistically significant (greater than 2.9σ) parity violation. An analysis treating the PNC matrix elements as random variables yields a root-mean-square PNC matrix element M=0.67_-0.16^+0.24 meV. The corresponding weak spreading width Γ_w=(1.35_-0.64^+0.97)×10^-7 eV.

Copyright Note

This is the publisher's version of the work. This publication appears in Gettysburg College's institutional repository by permission of the copyright owner for personal use, not for redistribution.

Recommended Citation

Crawford, B. E., Bowman, J. D., Delheij, P. P. J., Frankle, C. M., IInuma, M., Knudsen, J. N., Lowie, L. Y., Masaike, A., Matsuda, Y., Mitchell, G. E., Penttila, S. I., Postma, H., Roberson, N. R., Seestrom, S. J., Sharapov, E. I., Stephenson, S., Yen, Y.-F., & Yuan, V. W. (1998). Parity Nonconservation in Neutron Resonances in 238U. Physical Review C, 58(2), 1225–1235. http://dx.doi.org/10.1103/PhysRevC.58.1225

Required Publisher's Statement

Copyright held by American Physical Society. First published as BE Crawford et al, Parity nonconservation in neutron resonances in 238U, Physical Review C, 58:2, 1225–1235, doi: 10.1103/PhysRevC.58.1225.