Bulletin of the American Physical Society
2021 Fall Meeting of the APS Division of Nuclear Physics
Volume 66, Number 8
Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time
Session EJ: Instrumentation II
11:45 AM–1:45 PM,
Tuesday, October 12, 2021
Room: Tremont
Chair: Nathan Frank, Augustana College
Abstract: EJ.00003 : Measurement of scintillation light quenching for protons in a selection of rare earth inorganic scintillators
12:09 PM–12:21 PM
Presenter:
Tatiana N Espinoza
(Los Alamos National Laboratory)
Authors:
Tatiana N Espinoza
(Los Alamos National Laboratory)
David G Walter
(Los Alamos National Laboratory)
Kurtis D Bartlett
(Los Alamos National Laboratory)
Andrew S Hoover
(Los Alamos National Laboratory)
Brian A Larsen
(Los Alamos National Laboratory)
Caleb D Roecker
(Los Alamos National Laboratory)
Scintillation type detectors are commonly calibrated using gamma sources to understand their energy-dependent response. However, this response varies when detecting light ions due to quenching effects; the non-proportional light response of scintillators from the detection of light ions (p, d, t, 3He, 4He, ..) versus electrons (gamma-rays). Using three distinct types of rare earth inorganic scintillators, Y2SiO5(YSO:Ce), Y3Al5O12(YAG:Ce), and Gd3Al2Ga3O12 (GAGG:Ce), we measured the scintillation light output from incident protons with energies that range from 1-25 MeV. Energies over this range were reached using a 3 MV tandem accelerator and two types of nuclear reactions: elastic scattering off of an Au target and the 3He(d,p)4He reaction from an ErD2 target. Using Birks Law, we extracted the quenching parameters to understand the non-proportionality effect associated with these scintillation materials. Moreover, by testing three different GAGG crystals, which vary on their dopant concentrations, we investigated the effects of dopant concentration on quenching. Also, we investigated temperature effects by collecting data at temperatures ranging from 20° C to 40° C. Preliminary results from these measurements will be presented.
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