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The response of silicon detectors to conversion electrons in the decay of 109Cd, 233Pa and 137Cs, to deuterons in the energy range 35-440 keV from a Van de Graaff accelerator and to alpha particles from a mixed 239Pu, 241Am, 244Cm source has been measured. The results were found to be in agreement with the model proposed by Lennard et al. (1986) which describes the nonlinear detector response, in particular for the case of light ions. For electrons, the nonlinearity was found to be negligible within experimental uncertainties. For deuterons the nonlinearity observed in Rutherford-backscattering measurements at low energies was used to measure the window thickness of the detectors. For alpha particles in Si it has been confirmed that the energy required to create an electron-hole pair depends on the stopping power. The value for the nonlinearity parameter k = 2.8 +/- 0.3nm/electron-hole pair is larger than the one which was originally proposed.

Additional information

Authors: BAUER P, Johannes-Kepler-Universität Linz, Institut für Experimentalphysik, Linz (AT);BORTELS G, JRC Geel (BE)
Bibliographic Reference: Paper presented: 7th Symposium on Radiation Measurements and Applications, Ann Arbor, Michigan (US), May 21-24, 1991
Availability: Available from (1) as Paper EN 35314 ORA
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