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U.S. Department of Energy
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ELECTRON-ELECTRON COINCIDENCE SPECTROMETER BRS-IV

Technical Report ·
OSTI ID:4080313
The original construction and recent modifications of the BRS-IV electron-electron coincidence spectrometer are summarized, and instructions for its use are given. The original spectrometer consisted of two collinear thin- lens beta spectrometers back-to-back. The whole was iron-free, and Helmholtz coils were used to negate the effect of the earth's magnetic field. The spectrometer was designed for a 1% transmission with a 2% resolution. It became necessary to modify the instrument because of its low transmission and because a new coincidence circuit was needed for higher counting rates. The modification decreased the source-to-detector distance from 100 to 40 cm and increased the maximum solid angle accepted from the source from 0.4% to 4% of 4 pi . (T.R.H.)
Research Organization:
California. Univ., Berkeley. Lawrence Radiation Lab.
DOE Contract Number:
W-7405-ENG-48
NSA Number:
NSA-15-006133
OSTI ID:
4080313
Report Number(s):
UCRL-9423
Country of Publication:
United States
Language:
English

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