No abstract

Previous theoretical work has shown that parity and time-reversal symmetry can be tested with particularly high sensitivity in the domain of isolated compound-nucleus resonances. In this domain, experiments will naturally focus on individual resonances rather than on the background cross section. The theoretical analysis of this situation leads to the concept of an ensemble of "onresonance" measurements. This concept naturally emerges by combining two previous theoretical approaches to tests of fundamental symmetries. %'e investigate the properties of this new ensemble and show how to convert "on-resonance" data into statistically significant information on symmetry violation. 421718

Les possibilités de mesure des effets non-invariants par P et T dans les réactions avec neutrons sont discutées.

The theoretical estimates of the P-conserving 7Mnvariance violation in neutron transmission are reexamined. It is shown that the previously omitted factors of dynamical enhancement caused by the Tnonconserving interaction of the two closely lying resonances might sum up to an overall amplification of the effect by 3-5 orders of magnitude.

No abstract