Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002asap.conf..155m&link_type=abstract
ASTROPHYSICS, SYMMETRIES, AND APPLIED PHYSICS AT SPALLATION NEUTRON SOURCES. Proceedings of the Workshop on ASAP 2002. Held 11-1
Astronomy and Astrophysics
Astrophysics
Scientific paper
The TRIPLE Collaboration has studied parity violation in p-wave neutron resonances by measuring the cross section longitudinal asymmetries at neutron energies up to 300-2000 eV, depending on the target. The measurements were performed at the pulsed spallation neutron source of the Los Alamos Neutron Science Center. Parity violations were observed in 75 resonances of Br, Rh, Pd, Ag, Cd, In, Sn, I, Sb, Cs, Xe, La, U, and Th. Statistical methods were developed to determine the weak interaction rms matrix elements and the corresponding spreading widths Γw. The value of < Γw > is about 1.8 × 10-7 eV. Although the individual weak spreading widths are globally consistent with a constant or slowly varying mass dependence, there is also evidence for local fluctuations.
Bowman David J.
Mitchell G. E.
Penttila S. I.
Sharapov E. I.
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