A study on remotely-changeable moderators in Bonner sphere spectrometer for irradiation-field characterization in boron neutron capture therapy. (September 2020)

• Record Type: Journal Article
• Authors: Shiraishi, Sadaaki; Takata, Takushi; Tanaka, Hiroki; Sakurai, Yoshinori
• Is Part Of: Applied radiation and isotopes. Volume 163(2020:Sep.)
• Publication Date: 2020-09
• Subjects: Boron neutron capture therapy -- Bonner sphere -- Neutron energy spectrometer -- Characterization in irradiation field -- Quality assurance; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2020.109213
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: As part of the advancements in the characterization of the irradiation field for boron neutron capture therapy, we are developing a Bonner-sphere neutron energy spectrometer for which the liquid moderator is changed remotely. Simulations were performed to find the best combination of liquid moderators and composition of the Bonner spheres. The combination finally adopted was five-layered concentric acrylic spheres with two different liquid moderators and six optimal patterns for moderator injection. Highlights: Bonner-sphere spectrometer configured with remotely changeable liquid moderators. Simulation used to find suitable liquid moderators and Bonner-sphere composition. Five-layered concentric acrylic spheres with two liquid moderators were adopted. Of 33 original patterns, six optimal patterns were selected for moderator injection. Optimal patterns only were needed to obtain spectrum closer to the nominal spectrum.