Open AccessIonisation Chambers Containing Boron as Neutron Detectors in Mixed Radiation Fields
Author(s) -
M. Gryziński,
Piotr Tulik,
M. Zielczyński
Publication year - 2007
Publication title -
polish journal of medical physics and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 5
eISSN - 1898-0309
pISSN - 1425-4689
DOI - 10.2478/v10013-007-0007-4
Subject(s) - ionization chamber , boron , neutron , materials science , radiation , nuclear physics , neutron detection , range (aeronautics) , detector , linear particle accelerator , photon , sensitivity (control systems) , ionization , physics , proton , neutron capture , optics , ion , beam (structure) , engineering , quantum mechanics , electronic engineering , composite material
Ionisation Chambers Containing Boron as Neutron Detectors in Mixed Radiation Fields The paper presents a newly designed ionisation chambers containing boron, operated in the initial recombination regime. The chambers were either filled with BF 3 or the chamber electrodes were covered with B 4 C. The chambers can be placed in paraffin moderators. The sensitivity of the chambers was investigated depending on gas pressure, moderator thickness and polarizing voltage. The results showed that it was possible to obtain nearly the same sensitivity of the chamber to H* (10) for photons and neutrons in restricted energy range, however further investigations are needed to make an optimum design. The examples of applications for dosimetric measurements in mixed radiation fields near medical linear accelerator and in the vicinity of high-energy proton accelerator are presented.