Simultaneous macro and micro dosimetry with MOSFETs

Author

Rosenfeld, Anatoly B. ; Kaplan, Greg I. ; Carolan, Martin G. ; Allen, Barry J. ; Maughan, Richard ; Yudelev, Mark ; Kota, Chandra ; Coderre, J.

Author_Institution

Dept. of Phys., Wollongong Univ., NSW, Australia

Volume

43

Issue

6

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

2693

Lastpage

2700

Abstract

The application of MOSFET dosimeters in complicated mixed radiation fields for measurement of absorbed dose distribution in tissue equivalent phantoms has been studied. The spectra of secondary charged particles have been measured simultaneously with average absorbed doses by the same MOSFET dosimeter. A good correlation has been observed between neutron depth dose distribution in a water phantom obtained using MOSFETs in integral mode and a tissue equivalent (T.E.) ionisation chamber. Such MOSFET dosimeters are a promising tool for micro-macro dosimetry in Boron Neutron Capture Therapy (BNCT) and Fast Neutron Therapy (FNT). Paired MOSFETs with one of the dosimeters covered by ¹⁰B have been applied for measuring of average boron dose distribution and microdosimetric spectra due to alpha particles and ⁷Li ions throughout a perspex phantom exposed in the epithermal neutron beam at the Brookhaven Medical Research Reactor (BMRR)

Keywords

MOSFET; alpha-particle detection; dosimeters; dosimetry; neutron detection; radiation therapy; silicon radiation detectors; B; Brookhaven Medical Research Reactor; Li; MOSFETs; absorbed dose distribution; alpha particles; average absorbed doses; boron neutron capture therapy; dosimeters; epithermal neutron beam; fast neutron therapy; ion beam effects; macrodosimetry; microdosimetry; mixed radiation fields; neutron depth dose distribution; paired MOSFETs; perspex phantom; secondary charged particles; tissue equivalent phantoms; water phantom; Alpha particles; Boron; Current measurement; Dosimetry; Imaging phantoms; Ionization chambers; MOSFETs; Medical treatment; Neutron capture therapy; Particle measurements;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.556855

Filename

556855