T(p, p)TScattering near theT(p, n)He3Threshold

Abstract

The absolute cross section of $\mathrm{T}(p, p)\mathrm{T}$ elastic scattering at center-of-mass angles of 58° 38′ and 109° 31′ has been measured as a function of energy near the $\mathrm{T}(p, n){\mathrm{He}}^3$ threshold. Small but distinct perturbations are observed near the threshold and are discussed in the light of theoretical predictions. The bearing of the data on a possible excited state in ${\mathrm{He}}^4$ at 20 Mev is discussed.