Nonproportionality of Scintillator Detectors. IV. Resolution Contribution from Delta-Rays

Payne, Stephen A.

doi:10.1109/tns.2014.2387256

Nonproportionality of Scintillator Detectors. IV. Resolution Contribution from Delta-Rays

Journal Article · Thu Jan 29 00:00:00 EST 2015 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/tns.2014.2387256· OSTI ID:1860758

Payne, Stephen A. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

This paper is the fourth in a series of articles published on the light yield nonproportionality of scintillators and its impact on the detector's energy resolution. Herein, we focus on modeling the resolution degradation induced by delta-rays. To do this, we begin with Møller's classic equation to describe collisions between incident high-energy electrons and those in the scintillator medium, which lead to the delta-rays. The trajectories of delta-rays having energies above a specified cut-off value are further analyzed to determine the resolution degradation induced by fluctuations in their light yield and ionization density. Our conclusion is that the delta-ray contribution to resolution is typically smaller but comparable to that arising from the primary electron. We have considered the cases for two illustrative scintillators: NaI(Tl) and LSO(Ce)

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC03-76SF00098; AC52-07NA27344

OSTI ID:: 1860758

Report Number(s):: LLNL-JRNL-660604; 781736

Journal Information:: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 1 Vol. 62; ISSN 0018-9499

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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