Citation

Murawski L, Zielczynski M, Golnik N, Gryzinski MA. Radiat. Prot. Dosimetry 2013; 161(1-4): 130-133.

Affiliation

National Centre for Nuclear Research, Sołtana 7, Otwock 05-400, Poland.

Copyright

(Copyright © 2013, Oxford University Press)

DOI

10.1093/rpd/nct323

PMID

24324250

Abstract

A micro-gap air-filled ionisation chamber was designed for criticality dosimetry. The special feature of the chamber is its very small gap between electrodes of only 0.3 mm. This prevents ion recombination at high dose rates and minimises the influence of gas on secondary particles spectrum. The electrodes are made of polypropylene because of higher content of hydrogen in this material, when compared with soft tissue. The difference between neutron and gamma sensitivity in such chamber becomes practically negligible. The chamber's envelope contains two specially connected capacitors, one for polarising the electrodes and the other for collecting the ionisation charge.

Language: en