TRAPPING AND REFLECTION COEFFICIENTS FOR 3-HE IN NI AT OBLIQUE INCIDENCE
The areal density and the depth distribution of 3-He trapped in Ni as a function of the bombarding fluence was measured in the energy range of 1-25 keV and at angles of incidence between 0 and 85 degrees using nuclear reaction analysis. At fluences below saturation a linear relation is found between the areal density and the fluence. From its slope the trapping and reflection coefficients can be determined. The experimental data for trapping and reflection coefficients and for the depth profiles were compared with computer simulation results from the TRIM program. To reduce uncertainties in the absolute values of the experimental trapping coefficients, they were normalized to the TRIM values at normal incidence. The dependence of the between 0 and 80 degrees shows good agreement with the calculated data for incident energies from 3 to 25 keV, but for 1 keV the measured reflection coefficients are higher than the calculated ones.
Bibliographic Reference: APPLIED PHYSICS, VOL. 31 (1983), PP. 37-44
Record Number: 1989122030400 / Last updated on: 1987-01-01
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