Correlation between blister skin thickness, the maximum in the damage- energy distribution, and projected ranges of helium ions in Nb for the energy range 10 to 1500 keV

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:4011362

St-Jacques, R G; Martel, J G; Terreault, B; Veilleux, G; Das, S K; Kaminsky, M; Fenske, G

The skin thickness of blisters formed on polycrystalline niobium by $sup 4$He$sup +$ irradiation at room temperature for energies from 15 to 80 keV have been measured. Similar measurements were conducted for 10 keV $sup 4$He$sup +$ irradiation at 500$sup 0$C to increase blister exfoliation, and thereby allow examination of a larger number of blister skins. For energies smaller than 100 keV the skin thicknesses are compared with the projected range and the damage- energy distributions constructed from moments interpolated from Winterbon's tabulated values. For energies of 10 and 15 keV the projected ranges and damage- energy distributions have also been computed with a Monte Carlo program. For energies larger than 100 keV the projected ranges of $sup 4$He$sup +$ in Nb were calculated using either Brice's formalism or the one given by Schiott. The thicknesses for 60 and 80 keV, and those reported earlier for 100 to 1500 keV correlate well with calculated projected ranges. For energies lower than 60 keV the measured thicknesses are larger than the calculated ranges.

• Research Organization: Argonne National Lab., Ill. (USA)
• DOE Contract Number: W-31109-ENG-38
• NSA Number: NSA-33-026792
• OSTI ID: 4011362
• Report Number(s): CONF-760209--10
• Country of Publication: United States
• Language: English

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