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Parity nonconservation (PNC) has been studied in neutron p-wave resonances of 117Sn. The longitudinal asymmetries were measured for 29 p-wave resonances in the neutron energy range 0.8 eV to 1100 eV. Statistically significant PNC effects were observed for four resonances. A statistical analysis determined the rms weak mixing matrix element and the weak spreading width. A weak spreading width of Γw=(0.28-0.15+0.56)×10-7 eV was obtained for117Sn.

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Copyright held by American Physical Society. First published as DA Smith et al, Parity violation in neutron resonances of 117Sn, Physical Review C, 64, 015502 , doi: 10.1103/PhysRevC.64.015502.