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VOLUME 35 (1982) | ISSUE 1 | PAGE 42
Parity violation at the 0.75-eV neutron resonance of lanthanum-139
A parity violation at the 0.75-eV neutron resonance of lanthanum-139 has been observed in an experiment on the transmission of polarized resonance neutrons. The change in the cross section upon a change in the neutron helicity is P{Ep) = (σ+ σ~)/(σ + + σ~) = (7.3±0.5)X 10'2.