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- Title
Determination of the thermal and epithermal neutron sensitivities of an LBO chamber.
- Authors
Endo, Satoru; Sato, Hitoshi; Shimazaki, Takuto; Nakajima, Erika; Kotani, Kei; Suda, Mitsuru; Hamano, Tsuyoshi; Kajimoto, Tsuyoshi; Tanaka, Kenichi; Hoshi, Masaharu
- Abstract
An LBO (LiBO) walled ionization chamber was designed to monitor the epithermal neutron fluence in boron neutron capture therapy clinical irradiation. The thermal and epithermal neutron sensitivities of the device were evaluated using accelerator neutrons from the Be(d, n) reaction at a deuteron energy of 4 MeV (4 MeV d-Be neutrons). The response of the chamber in terms of the electric charge induced in the LBO chamber was compared with the thermal and epithermal neutron fluences measured using the gold-foil activation method. The thermal and epithermal neutron sensitivities obtained were expressed in units of pC cm, i.e., from the chamber response divided by neutron fluence (cm). The measured LBO chamber sensitivities were 2.23 × 10 ± 0.34 × 10 (pC cm) for thermal neutrons and 2.00 × 10 ± 0.12 × 10 (pC cm) for epithermal neutrons. This shows that the LBO chamber is sufficiently sensitive to epithermal neutrons to be useful for epithermal neutron monitoring in BNCT irradiation.
- Subjects
EPITHERMAL neutrons; BORON-neutron capture therapy; GOLD foil; THERMAL neutrons; DEUTERON scattering; LITHIUM borate
- Publication
Radiation & Environmental Biophysics, 2017, Vol 56, Issue 3, p269
- ISSN
0301-634X
- Publication type
Article
- DOI
10.1007/s00411-017-0700-y