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Measurement of $$\alpha $$-particle quenching in LAB based scintillator in independent small-scale experiments
- Source :
- European Physical Journal C, European Physical Journal C 76(2016)3, 109
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- The $\alpha$-particle light response of liquid scintillators based on linear alkylbenzene (LAB) has been measured with three different experimental approaches. In the first approach, $\alpha$-particles were produced in the scintillator via $^{12}$C($n$,$\alpha$)$^9$Be reactions. In the second approach, the scintillator was loaded with 2% of $^{\mathrm{nat}}$Sm providing an $\alpha$-emitter, $^{147}$Sm, as an internal source. In the third approach, a scintillator flask was deployed into the water-filled SNO+ detector and the radioactive contaminants $^{222}$Rn, $^{218}$Po and $^{214}$Po provided the $\alpha$-particle signal. The behavior of the observed $\alpha$-particle light outputs are in agreement with each case successfully described by Birks' law. The resulting Birks parameter $kB$ ranges from $(0.0066\pm0.0016)$ cm/MeV to $(0.0076\pm0.0003)$ cm/MeV. In the first approach, the $\alpha$-particle light response was measured simultaneously with the light response of recoil protons produced via neutron-proton elastic scattering. This enabled a first time a direct comparison of $kB$ describing the proton and the $\alpha$-particle response of LAB based scintillator. The observed $kB$ values describing the two light response functions deviate by more than $5\sigma$. The presented results are valuable for all current and future detectors, using LAB based scintillator as target, since they depend on an accurate knowledge of the scintillator response to different particles.<br />Comment: 14 pages, 15 figures, 3 tables
- Subjects :
- Quenching
Physics
Elastic scattering
Physics - Instrumentation and Detectors
Physics and Astronomy (miscellaneous)
Proton
Physics::Instrumentation and Detectors
010308 nuclear & particles physics
Linear Alcyl Benzene
Scale (descriptive set theory)
Scintillator
01 natural sciences
High Energy Physics - Experiment
3. Good health
Liquid Scintillatiors
Recoil
0103 physical sciences
Particle
Atomic physics
Astrophysics - Instrumentation and Methods for Astrophysics
Nuclear Experiment
010306 general physics
Engineering (miscellaneous)
α particles
Subjects
Details
- ISSN :
- 14346052 and 14346044
- Volume :
- 76
- Database :
- OpenAIRE
- Journal :
- The European Physical Journal C
- Accession number :
- edsair.doi.dedup.....0baf0e33c793d5647a0284759cdbbc70
- Full Text :
- https://doi.org/10.1140/epjc/s10052-016-3959-2