Relative neutron sensitivities of plastic liners in ionisation chambers

Journal Article · Fri Mar 01 04:00:00 EDT 1974 · Health Phys., v. 26, no. 3, pp. 263-266

OSTI ID:4352489

Tymons, B J; Cooper, P N; Hunt, S E

The growing demand for a personnel neutron dosimeter capable of giving an immediate indication of integrated neutron dose has led to the consideration of ionization chambers for this purpose, using the aroton knock on'' process for the detection of fast neutrons. A convenient method of providing target protons is to use a plastic liner which can be incorporated in the interior wall of a simple condenser ionization chamber of the type which is commercially available as a personnel monitor for gamma rays. The sensitivity of such a neutron dosimeter should be controllable by varying the hydrogen content of the plastic liner. The sensitivity of ionization chambers to fast neutrons was measured using plastic liners ranging from PTFE which has zero hydrogen content to polythene which has the highest hydrogen content of plastics which are readily available. While the main interest was in measuring the ratio of sensitivities to fast neutrons and gamma rays some tests were carried out to determine the response to thermal neutrons. (UK)

• Research Organization: Aston Univ., Birmingham, Eng.
• NSA Number: NSA-29-020978
• OSTI ID: 4352489
• Journal Information: Health Phys., v. 26, no. 3, pp. 263-266, Journal Name: Health Phys., v. 26, no. 3, pp. 263-266; ISSN HLTPA
• Country of Publication: United Kingdom
• Language: English

Related Subjects

*GAMMA DOSIMETRY-- IONIZATION CHAMBERS
*IONIZATION CHAMBERS-- SENSITIVITY
*NEUTRON DOSIMETRY-- IONIZATION CHAMBERS
FAST NEUTRONS
HYDROGEN
N46120* --Instrumentation--Radiation Detection Instruments-- Radiation Dosimeters
NYLON
PERSONNEL DOSIMETRY
PLASTICS
POLYETHYLENES
POLYSTYRENE
POLYVINYL CHLORIDE
PROTON RECOIL DETECTORS
SLOW NEUTRONS
TEFLON