Differential Range Study of Products Formed by 2.9-GeV Proton Irradiation of Silver
- 22 June 1964
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 134 (6B), B1262-B1269
- https://doi.org/10.1103/PhysRev.134.B1262
Abstract
Thin silver targets (≈0.1 mg/) were irradiated with 2.9-GeV protons. The recoiling products were collected in a stack of thin plastic films at 90° to the beam, at a geometry of 2%. By radiochemical separation , , , , and were removed from the films. Range distributions were obtained for each, and from these the corresponding energy spectra and velocity spectra were deduced. The mean energies are: —3.2 MeV, —5.9 MeV, —9.4 MeV, —18.1 MeV. Comparison of the observed spectra with the results of Monte Carlo cascade-evaporation calculations showed excellent agreement for all of the products except . It is concluded that the former are mainly spallation residues while is formed by the splitting of a parent nucleus into two fragments. All of the energy spectra are very broad and there is no sharp difference between "spallation-type" spectra and "two-body breakup" type spectra.
Keywords
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