Neutron spectra measurement and comparison of the HFR and THOR BNCT beams.
This paper aims to measure the spectra of HB11 (high flux reactor, HFR) and the Tsing Hua open-pool reactor (THOR) boron neutron capture therapy (BNCT) beams by multiple activation foils. The self-shielding corrections were made with the aid of MCNP calculations. The initial spectra were adjusted by a sophisticated process named coarse-scaling adjustment using SAND-EX, which can adjust a given coarse-group spectrum into a fine-group structure, i.e. 640 groups, with excellent continuity. The epithermal neutron flux of the THOR beam is about three times of HB11. The thermal neutron flux, boron and gold reaction rates along the central axis of a PMMA phantom are calculated for both adjusted spectra for comparison.
Liu
Yuan-Hao
YH
Engineering and System Science Department, National Tsing Hua University, Taiwan. yhl.taiwan@gmail.com
Nievaart
Sander
S
Tsai
Pi-En
PE
Liu
Hong-Ming
HM
Moss
Ray
R
Jiang
Shiang-Huei
SH
D016754:Boron Neutron Capture Therapy / Q000295:instrumentation / Q000706:statistics & numerical data*; D005214:Fast Neutrons / Q000627:therapeutic use*; D006801:Humans; D009688:Nuclear Reactors; D019047:Phantoms, Imaging / Q000706:statistics & numerical data; D019904:Polymethyl Methacrylate; D011880:Radiotherapy Planning, Computer-Assisted / Q000706:statistics & numerical data; D013624:Taiwan
D019904:Polymethyl Methacrylate