Lineshape response of plastic scintillator to pair production of 4.44 MeV gamma's
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909948012658688 |
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| author | Ozen, Melisa Behr, John A. Khoo, Michelle Klose, Felix Gorelov, Alexandre Melconian, Dan |
| author_facet | Ozen, Melisa Behr, John A. Khoo, Michelle Klose, Felix Gorelov, Alexandre Melconian, Dan |
| contents | We measure the distribution of energy deposited in a 40x88 mm plastic scintillator by e+ e- pair production of 4.44 MeV gamma-rays. We observe the double-escape peak of 3.42 MeV from pair production by tagging 511 keV annihilation radiation in two high-Z scintillators. The source is a standard commercial neutron source using alpha-emitting 241Am encapsulated with 9Be, which has a reaction branch feeding the first Ipi=2+ state of 12C making the 4.44 MeV gamma-rays. We demonstrate the extraction of the double-escape peak from the large neutron-produced backgound, and explore some of the features and difficulties of this technique with our apparatus. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_07023 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Lineshape response of plastic scintillator to pair production of 4.44 MeV gamma's Ozen, Melisa Behr, John A. Khoo, Michelle Klose, Felix Gorelov, Alexandre Melconian, Dan Instrumentation and Detectors Nuclear Experiment We measure the distribution of energy deposited in a 40x88 mm plastic scintillator by e+ e- pair production of 4.44 MeV gamma-rays. We observe the double-escape peak of 3.42 MeV from pair production by tagging 511 keV annihilation radiation in two high-Z scintillators. The source is a standard commercial neutron source using alpha-emitting 241Am encapsulated with 9Be, which has a reaction branch feeding the first Ipi=2+ state of 12C making the 4.44 MeV gamma-rays. We demonstrate the extraction of the double-escape peak from the large neutron-produced backgound, and explore some of the features and difficulties of this technique with our apparatus. |
| title | Lineshape response of plastic scintillator to pair production of 4.44 MeV gamma's |
| topic | Instrumentation and Detectors Nuclear Experiment |
| url | https://arxiv.org/abs/2512.07023 |