Scintillation characteristics of the EJ-299-02H scintillator
Journal Article
·
· Review of Scientific Instruments
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); University of Kentucky, Lexington, KY (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); California Institute of Technology (CalTech), Pasadena, CA (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); North Carolina State University, Raleigh, NC (United States)
- Tennessee Technological University, Cookeville, TN (United States)
- Indiana University, Bloomington, IN (United States)
- University of Illinois at Urbana-Champaign, IL (United States)
- East Tennessee State University (ETSU), Johnson CIty, TN (United States)
- North Carolina State University 4 , Raleigh, North Carolina 27695, USA
Here a study of the dead layer thickness and quenching factor of a plastic scintillator for use in ultracold neutron (UCN) experiments is described. Alpha spectroscopy was used to determine the thickness of a thin surface dead layer to be 630 ± 110 nm. The relative light outputs from the decay of 241Am and Compton scattering of electrons were used to extract Birks’ law coefficient, yielding a kB value of 0.087 ± 0.003 mm/MeV, consistent with some previous reports for other polystyrene-based scintillators. The results from these measurements are incorporated into the simulation to show that an energy threshold of (∼9 keV) can be achieved for the UCNProBe experiment. This low threshold enables high beta particle detection efficiency and the indirect measurement of UCN. The ability to make the scintillator deuterated, accompanied by its relatively thin dead layer, gives rise to unique applications in a wide range of UCN experiments, where it can be used to trap UCN and detect charged particles in situ.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- 89233218CNA000001; FG02-97ER41042
- OSTI ID:
- 2340885
- Report Number(s):
- LA-UR--23-27695
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 4 Vol. 95; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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