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Title: Real-time algorithm for robust coincidence search

Abstract

In in-beam {gamma}-ray spectroscopy experiments, we often look for coincident detection events. Among every N events detected, coincidence search is naively of principal complexity O(N{sup 2}). When we limit the approximate width of the coincidence search window, the complexity can be reduced to O(N), permitting the implementation of the algorithm into real-time measurements, carried out indefinitely. We have built an algorithm to find simultaneous events between two detection channels. The algorithm was tested in an experiment where coincidences between X and {gamma} rays detected in two HPGe detectors were observed in the decay of {sup 61}Cu. Functioning of the algorithm was validated by comparing calculated experimental branching ratio for EC decay and theoretical calculation for 3 selected {gamma}-ray energies for {sup 61}Cu decay. Our research opened a question on the validity of the adopted value of total angular momentum of the 656 keV state (J{sup {pi}} = 1/2{sup -}) in {sup 61}Ni.

Authors:
; ; ; ;  [1];  [2]
  1. Jozef Stefan Institute, Jamova cesta 39, Ljubljana, Slovenia and Cosylab d.d., Control System Laboratory, Teslova ulica 30, Ljubljana (Slovenia)
  2. (Slovenia)
Publication Date:
OSTI Identifier:
22075595
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1491; Journal Issue: 1; Conference: Conference on nuclear structure and dynamics 2012, Opatija (Croatia), 9-13 Jul 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALGORITHMS; APPROXIMATIONS; BRANCHING RATIO; COINCIDENCE SPECTROMETRY; COPPER 61; ELECTRON CAPTURE; ENERGY-LEVEL TRANSITIONS; GAMMA DETECTION; GAMMA SPECTROMETERS; GAMMA SPECTROSCOPY; HIGH-PURITY GE DETECTORS; KEV RANGE; NICKEL 61; TIME MEASUREMENT; X-RAY DETECTION

Citation Formats

Petrovic, T., Vencelj, M., Lipoglavsek, M., Gajevic, J., Pelicon, P., and Jozef Stefan Institute, Jamova cesta 39, Ljubljana. Real-time algorithm for robust coincidence search. United States: N. p., 2012. Web. doi:10.1063/1.4764223.
Petrovic, T., Vencelj, M., Lipoglavsek, M., Gajevic, J., Pelicon, P., & Jozef Stefan Institute, Jamova cesta 39, Ljubljana. Real-time algorithm for robust coincidence search. United States. doi:10.1063/1.4764223.
Petrovic, T., Vencelj, M., Lipoglavsek, M., Gajevic, J., Pelicon, P., and Jozef Stefan Institute, Jamova cesta 39, Ljubljana. Sat . "Real-time algorithm for robust coincidence search". United States. doi:10.1063/1.4764223.
@article{osti_22075595,
title = {Real-time algorithm for robust coincidence search},
author = {Petrovic, T. and Vencelj, M. and Lipoglavsek, M. and Gajevic, J. and Pelicon, P. and Jozef Stefan Institute, Jamova cesta 39, Ljubljana},
abstractNote = {In in-beam {gamma}-ray spectroscopy experiments, we often look for coincident detection events. Among every N events detected, coincidence search is naively of principal complexity O(N{sup 2}). When we limit the approximate width of the coincidence search window, the complexity can be reduced to O(N), permitting the implementation of the algorithm into real-time measurements, carried out indefinitely. We have built an algorithm to find simultaneous events between two detection channels. The algorithm was tested in an experiment where coincidences between X and {gamma} rays detected in two HPGe detectors were observed in the decay of {sup 61}Cu. Functioning of the algorithm was validated by comparing calculated experimental branching ratio for EC decay and theoretical calculation for 3 selected {gamma}-ray energies for {sup 61}Cu decay. Our research opened a question on the validity of the adopted value of total angular momentum of the 656 keV state (J{sup {pi}} = 1/2{sup -}) in {sup 61}Ni.},
doi = {10.1063/1.4764223},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1491,
place = {United States},
year = {2012},
month = {10}
}