Stability of scintillation detectors

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · J. Nucl. Med.; (United States)

OSTI ID:5404537

Abrahamson, H; Brandt, R; Gullquist, R; Strandell, T

This paper describes how a photomultiplier tube in a scintillation detector changes pulse height with time, when the detector is exposed to a gamma-emitting source and high dynode voltage. The change in pulse height causes a ''drift'' of the spectral peaks out of the preadjusted energy window, and errors in counting rate of about 20% are detected. The drift is dependent on the photon flux, the level of the high voltage, and the energy of the source. The effect was not present in all detectors studied. It is thus important to check the stability properties of a detector before use.

• OSTI ID: 5404537
• Journal Information: J. Nucl. Med.; (United States), Journal Name: J. Nucl. Med.; (United States) Vol. 22:9; ISSN JNMEA
• Country of Publication: United States
• Language: English

Related Subjects

440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ERRORS
MEASURING INSTRUMENTS
PHOTOMULTIPLIERS
PHOTOTUBES
PULSE RISE TIME
RADIATION DETECTORS
SCINTILLATION COUNTERS
SCINTILLATOR-PHOTODIODE DETECTORS
STABILITY
TIME DEPENDENCE
TIMING PROPERTIES