EFFECT OF GASEOUS IMPURITIES IN BF$sub 3$ PROPORTIONAL COUNTERS
Technical Report
·
OSTI ID:4274198
The effects which SiF/sub 4/, SO/sub 2/, and SF/sub 6/ have on the plateau and pulse-size distribution of a proportional counter were investigated. SiF/sub 4/ was tested at 30, 45, and 60 cm Hg of BF/sub 3/. Its effect was found to be independent of the counter pressure fur the range of values considered. From the variation in the plateau, the attachment probability for SiF/sub 4/ was calculated to be h = 1.458 x 10/sup -5/ and its cross section for attachment to be sigma /sub a/ = 5.12 x 10/sup -20/ cm. The permissible amount of these gases without the counter being affected beyond the limits of tolerance which are set up were found to be 0.04% for SiF/sub 4/, 0.01% for SO/sub 2/, and 2.0 x 10/sup - 6%/ for SF/sub 6/. (auth)
- Research Organization:
- New York Univ., New York. Coll. of Engineering
- NSA Number:
- NSA-13-011777
- OSTI ID:
- 4274198
- Report Number(s):
- AFOSR-TN-59-162; AD-211141
- Country of Publication:
- United States
- Language:
- English
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