Accelerator-driven photon reference field for replacement of 137 Cs γ-ray
A transition to a mechanical source for x-ray reference field is desired to replace high-activity Co-60 and Cs-137 gamma-ray sources for enhancing nuclear security and safety management. The National Metrology Institute of Japan (NMIJ) developed a new photon reference field using an electron beam fr...
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Veröffentlicht in: | Metrologia 2023-08, Vol.60 (4), p.42101 |
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creator | Ishii, Junya Satoh, Daisuke Fujiwara, Takeshi Tanaka, Masahito Kato, Masahiro Kurosawa, Tadahiro |
description | A transition to a mechanical source for x-ray reference field is desired to replace high-activity Co-60 and Cs-137 gamma-ray sources for enhancing nuclear security and safety management. The National Metrology Institute of Japan (NMIJ) developed a new photon reference field using an electron beam from a linac with energy less than 1 MeV. The effective energy of the photon field is comparable with Cs-137 gamma-ray. The air kerma rate in the reference field was validated by comparing a commercial cavity ionization chamber to the NMIJ standard reference field. The calibration constants were consistent within 0.8% for every relative extended uncertainty (
k
= 2). |
doi_str_mv | 10.1088/1681-7575/acd8c0 |
format | Article |
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k
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k
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title | Accelerator-driven photon reference field for replacement of 137 Cs γ-ray |
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