Spatial parity nonconservation (PNC) has been studied in the compound-nuclear states of 134Cs by measuring the helicity dependence of the neutron total cross section. Transmission measurements on a thick 133Cs target were performed by the time-of-flight method at the Manuel Lujan Neutron Scattering Center with a longitudinally polarized neutron beam in the energy range from 5 to 400 eV. A total of 28 new p-wave resonances were found, their neutron widths determined, and the PNC longitudinal asymmetries of the resonance cross sections measured. The value obtained for the root-mean-square PNC element M=(0.06-0.02+0.25) meV in 133Cs is the smallest among all targets studied. This value corresponds to a weak spreading width Γw=(0.006-0.003+0.154)×10-7 eV.
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Sharapov, E I.; Bowman, J D.; Crawford, B E.; Delheij, P P J.; Haseyama, T; Knudsen, J N.; Lowie, L Y.; Masaike, A; Masuda, Y; Matsuda, Y; Mitchell, G E.; Penttila, S I.; Postma, H; Roberson, N R.; Seestrom, S J.; Stephenson, Sharon; Yen, Y-F; and Yuan, V W., "Parity Nonconservation in Neutron Resonances in 133Cs" (1999). Physical Review C, 59(3), 1772–1779. http://dx.doi.org/10.1103/PhysRevC.59.1772
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Copyright held by American Physical Society. First published as EI Sharapov et al, Parity Nonconservation in Neutron Resonances in 133Cs, Physical Review C, 59:3, 1772–1779, doi: 10.1103/PhysRevC.59.1772.