Effects of detector–source distance and detector bias voltage variations on time resolution of general purpose plastic scintillation detectors

Effects of source-detector distance and the detector bias voltage variations on time resolution of a general purpose plastic scintillation detector such as BC400 were investigated. 133Ba and 207Bi calibration sources with and without collimator were used in the present work. Optimum source-detector distance and bias voltage values were determined for the best time resolution by using leading edge timing method. Effect of the collimator usage on time resolution was also investigated.

► Effect of the source-detector distance on time spectra was investigated.
► Effect of the detector bias voltage variations on time spectra was examined.
► Optimum detector–source distance was determined for the best time resolution.
► Optimum detector bias voltage was determined for the best time resolution.
► 133Ba and 207Bi radioisotopes were used.