Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8179258 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2013 | 12 Pages |
Abstract
A novel method for direct electronic “fast-timing” lifetime measurements of nuclear excited states via γ-γ coincidences using an array equipped with NâN equally shaped very fast high-resolution LaBr3(Ce) scintillator detectors is presented. Analogous to the mirror symmetric centroid difference method, the generalized centroid difference method provides two independent “start” and “stop” time spectra obtained by a superposition of the N(Nâ1)γ-γ time difference spectra of the N detector fast-timing system. The two fast-timing array time spectra correspond to a forward and reverse gating of a specific γ-γ cascade. Provided that the energy response and the electronic time pick-off of the detectors are almost equal, a mean prompt response difference between start and stop events is calibrated and used as a single correction for lifetime determination. These combined fast-timing arrays mean γ-γ time-walk characteristics can be determined for 40keV
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
J.-M. Régis, H. Mach, G.S. Simpson, J. Jolie, G. Pascovici, N. Saed-Samii, N. Warr, A. Bruce, J. Degenkolb, L.M. Fraile, C. Fransen, D.G. Ghita, S. Kisyov, U. Koester, A. Korgul, S. Lalkovski, N. MÄrginean, P. Mutti, D. Wilmsen,