Construction details of a 5" diameter 1.7 litre gas scintillation counter are given. The behaviour of the counter when containing He⁴ gas and a mixture of He⁴ and 10% Xe at various total pressures has been investigated.
Two 5" photomultiplier tubes and a variety of different gas purifiers were tested in an attempt to obtain the best possible resolution.
The pulse height was found to depend sensitively on the purification procedure adopted. A resolution of 10% for the Po²¹⁰ α-peak has been attained in two different chambers containing He⁴ plus 10% Xe. The voltage pulses rose in ≤300 nsec. Intense irradiation of a counter with 6 Mev x-rays caused only a slight increase in the maximum noise level already present from the photomultiplier tube.
The behaviour of the counter as a fast neutron detector has been investigated using an uncollimated beam of 4.1 Mev neutrons. Pulses from recoiling protons and C¹² nuclei were observed as well as the He⁴ recoils. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/40226 |
Date | January 1959 |
Creators | Beer, George Atherley |
Publisher | University of British Columbia |
Source Sets | University of British Columbia |
Language | English |
Detected Language | English |
Type | Text, Thesis/Dissertation |
Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
Page generated in 0.0014 seconds