Energy spectra of nuclear fragments produced by high energy protons

Fragment energy spectra from the 2.1- and 4.9-GeV proton irradiation of C, Al, Ag, and U targets were measured at several angles to the beam for products ranging from He up to Ar for the heavier targets. The fragments were detected in a telescope consisting of a gas ΔE counter and a silicon E counter. The carbon target measurements are compared with previous data from projectile fragmentation studies. A Maxwellian type functional form which fits the energy spectra from all the targets is presented. The spectra were integrated to obtain values of the cross section as a function of atomic number.NUCLEAR REACTIONS C(p,X), $E=2.1, 4.9$ GeV; measured σ(E,θ), X=He to C. Al(p,X), $E=2.1, 4.9$ GeV; measured σ(E,θ), X=He to Na. Ag(p,X), $E=4.9$ GeV; measured σ(E,90^∘), X=N to Ar. U(p,X), $E=4.9$ GeV; measured σ(E,θ), σ(X), X=F to Ar. Spallation, fragmentation.