Asymmetry In Angular Distribution Research Articles

Forward asymmetry of the photoneutron angular distribution

An analysis is made of the present experimental data on the fast photoneutron angular distribution from Bi 209. A sure indication of a conspicuous forward asymmetry is found that cannot be explained on the basis of any available theory. Some indications are given for a possible explanation of the asymmetric term. In appendix 2 some new data are given of the fast photoneutron angular distribution from Bi 209, obtained using the Al 27(n, α)Na 24 reaction as a detector.

Non-elastic collisions of fast π mesons with nucleons and peripheral (ππ) interactions

A model of central and peripheral pion-nucleon collisions is discussed on the basis of ( π −p)-collisions at E = 5 GeV. The asymmetry of angular distribution of produced particles observed in experiments may be explained on the assumption that the cross-section of peripheral collisions constitutes $ ̆ 20% of the total cross-section of ( π −p). An estimate σ ππ ≈ σ π N is obtained for the cross-section of (ππ) interactions at E ≳ 1 GeV. Angular asymmetry of strange particles produced in ( π −p) collisions is discussed.