NaI /CENTER DOT/ Tl AS AN ELECTRON DETECTOR IN A $beta$-SPECTROMETER
- Argonne National Laboratory, Argonne, Illinois
The specific response (peak pulse amplitude/kev) vs. electron energy was studied for a cleaved NaI. Tl scintillator disc (18 iam x 2 mm) in a magnetic BETA spectrometer, from 6 to 1000 kev. The response agrees qualitatively with that deduced from gamma-ray data. No reflector covering foil was used, and the light was collected from the cylindrical surface of the disc with a shaped lucite doughnut ring surrounding the crystal, which was mounted directly on the photomultiplier (BMI-9536S) cathode face. Pulse amplitude distributions and backscattering as a function of angle of incidence were studied. Several delayed response states (T/sub 1/2/, = approximates 300 mu sec, approximates 8 msec, approximates 1 minute, at 25 deg C) were observed. Problems relating to its use as a wide range, high efficiency (>90% at 6 kev) electron detector in a BETA spectrometer are discussed, particularly with respect to the background due to the long-lived traps. (auth)
- Research Organization:
- Argonne National Lab., Ill.
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- W-31-109-ENG-38
- NSA Number:
- NSA-18-007042
- OSTI ID:
- 4110645
- Report Number(s):
- CONF-340-4
- Resource Relation:
- Conference: American Physical Society 1963 Autumn Meeting Chicago, Illinois October 18-19, 1963; Other Information: From American Physical Society 1963 Autumn Meeting, Chicago, Oct. 1963. Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- United States
- Language:
- English
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