Title: Nuclear radiation measuring method and apparatus having blanking time inversely related to count rate

Abstract: A method and apparatus for inhibiting measurement of nuclear radiation in a scintillation counter during periods of excessive background radioactivity produced, for example, by cosmic energy surges impinging on the scintillation counter. The count rate of a radioactive source or sample being measured is monitored and detector means are provided for detecting the occurrence of an energy surge exceeding a predetermined energy level. When a surge is detected, inhibit means inhibits counting for a time period which varies inversely with the count rate.

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Inventors: Luitwieler, Jr., Samuel H. (La Mirada, CA, US)

Application Number: 702253
Filing Date: 1976-07-02
Publication_date: 1977-09-20
Assignee: Beckman Instruments, Inc. (Fullerton, CA)
Primary Class(es): 250/369 250/336.1, 250/366, 327/552
Other Classes:
US Patent Ref:

2681989	Jun, 1954	Cunniff	328/165.
3246150	Apr, 1966	Stoddart et al.	250/369.
3859532	Jan, 1975	Luitwieler	250/369.

Other Refs:
Primary Examiner: Dixon, Harold A.
Assistant Examiner:
Attorney: Steinmeyer; R. J., Meads; R. R., Shewmaker; J. R.