G.L. Giles

Analyzing power of the pd → tπ+ reaction at 305, 330, 375 and 400 MeV

Abstract Analyzing power measurements of the pd → tπ+ reaction are reported at incident proton energies of 305, 330, 375 and 400 MeV over the angular range from 68° to 145.5° in the center of mass. The results are compared with earlier measurements obtained at 400 and 500 MeV. The analyzing power at 375 MeV exhibits a distribution unlike that observed at lower energies. The analyzing power at 400 MeV, and for large pion emission angles, is in significant disagreement with other results, for the same energy, reported in the literature.

The differential cross section for proton-proton elastic scattering at 90° c.m. between 300 and 500 MeV

Abstract The absolute differential cross section for proton-proton elastic scattering has been measured at 90° c.m. for 300, 350, 400, 450 and 500 MeV. The statistical uncertainty of the measurements is 0.5% with an additional systematic normalization uncertainty of 1.8%. The results are compared to phase-shift analyses.

Angular dependence of the 6Li(π+, 3He)3He reaction at 60 and 80 MeV

Abstract Angular distributions of the differential cross sections for the pionic fission 6 Li (π + , 3 He ) 3 He have been measured at pion energies of 60 and 80 MeV. The differential cross section is found to decrease monotonically with cos 2 θ ∗ and is compared with a theoretical prediction.

A study of the 6Li(π+, 3He)3He reaction at 60, 80, 100 and 140 MeV incident pion beam energies

Abstract Angular distributions of the 6 Li (π + , 3 He ) 3 He differential cross section are presented for incident pion beam energies of 60, 80 and 100 MeV, together with a few values at 140 MeV. The results are compared with previously published data and two theoretical predictions. The 60, 80 and 100 MeV data, and previously published results for 15.4 MeV, were fit to Legendre polynomials. The fitted coefficients, which allow the energy dependence of the total and differential cross sections at a fixed c.m. angle to be determined, are also presented. These coefficients show the increasing importance of higher-order partial-waves with increasing pion energy.

Pion production from deuterium bombarded with polarized protons of 277 and 500 MeV

Abstract Analyzing power measurements of the p → tτ + reaction are reported at incident proton energies of 277 and 500 MeV. The 277 MeV results span the angular range from 70° to 130° in the centre of mass while the two 500 MeV measurements at large angles were taken as a check of published results. With the angular distribution of the analyzing power at 277 MeV now known, it is possible to show that the energy dependence of the analyzing power exhibits characteristics closely resembling the shape and magnitude of the analyzing power distribution observed for 1p shell nuclei of similar excitation energies.