COINCIDENCE SUMMING AND NON-LINEARITY STUDIES WITH A TWO-CRYSTAL SCINTILLATION GAMMA SPECTROMETER

Journal Article · Fri Sep 01 04:00:00 EDT 1961 · Nuclear Instr. & Methods

DOI:https://doi.org/10.1016/0029-554X(61)90182-3· OSTI ID:4821623

Kantele, J; Fink, R W

A two-crystal 4 pi NaI(Tl) scintillation gamma spectrometer is used for studying coincidence summing effects with special reference to the energy calibration in the region 0.5 to 4 Mev of coincidence sum peaks of cascade gammas. From observed deviations of the sum peak positions from those expected according to calibrations with single photopeaks, the nonlinear response of NaI(Tl) is investigated. The pulse height per unit energy as a function of energy appears to approach a constant value with increasing energy up to 4 Mev. A slight shift in single photopeak position when collimation is introduced is observed at most gamma energies with a single crystal spectrometer. Possible reasons for the apparent nonlinearity are discussed. (auth)

• Research Organization: Univ. of Arkansas, Fayetteville
• NSA Number: NSA-16-005518
• OSTI ID: 4821623
• Journal Information: Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 13
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COINCIDENCE METHODS
ENERGY LEVELS
ENGINEERING AND EQUIPMENT
GAMMA SPECTROMETERS
PHOTOELECTRIC EFFECT
RADIATION DETECTORS
SCINTILLATION COUNTERS
SODIUM IODIDES