Half-life Measurements of Excited Levels in Fission Products around Mass Number 150

Kojima, Y.; Shima, Yosuke; Hayashi, Hiroaki; Taniguchi, Atsuhiko; Shibata, M.

doi:10.1016/j.nds.2014.07.004

Cited by 6 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By fitting a Gaussian function on the time spectrum, the time resolution was determined to be 300 ± 5 ps (FWHM) from which the contribution of each detector amounts to 212 ps. This result is consistent with the results reported in the literatures [15,16], for example, a time resolution of 315 ps (FWHM) was reported for two identical 1 × 1 detectors, gating on 1.17 MeV and 1.33 MeV energy lines of 60 Co [15]. It has to be mentioned that the time resolution of LaBr 3 :Ce detectors strongly depends on the size of the detectors, as well as, the energy range of γ-rays, so that the best resolution is generally achieved with smaller detectors and at higher energies [2,16].…”

Section: Timing Measurementssupporting

confidence: 94%

Digital processing of signals from LaBr₃:Ce scintillation detectors

2014

View full text Add to dashboard Cite

In this paper, we report on the results of digital signal processing of LaBr 3 (Ce) detectors. The photomultiplier (PMT) output signals from two cylindrical LaBr 3 (Ce) detectors (1.5 diameter and 2 tall) were directly digitized with an ultrafast digitizer (sampling rate up to 4 GSample/s and 10-bits resolution) and the energy and timing information were extracted through offline analysis of the pulses. It is shown that at high sampling rates (4 GS/s) a simple integration of pulses is sufficient to reproduce the analogue energy resolution of the detectors (3.5% at 662 keV energy) and by employing a digital version of constant-fraction discrimination (CFD) timing a time resolution of 240 ps (FWHM) is achieved at the energy lines of 60 Co. The effects of pulse sampling rate were studied, indicating a degradation of the performance of the detectors with reducing the pulse sampling rate. In particular, it was found that at sampling rates below 1 GS/s, the digital timing can be limited by the aliasing error. By using an anti-aliasing filter, a time resolution of 375 ps (FWHM) and an energy resolution of 3.5% at 662 keV were achieved with a sampling rate of 500 MS/s.

show abstract