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Radiation Protection Dosimetry Advance Access originally published online on August 4, 2008
Radiation Protection Dosimetry 2008 132(1):25-28; doi:10.1093/rpd/ncn205
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Multiplication factors in ethylene-filled proportional counters

H. Loyola1,*, L. Birstein1 and A. Hevia2

1 Comision Chilena de Energía Nuclear CCHEN, Santiago, Nueva Bilbao 12501, Chile
2 Universidad de los Andes, Santiago, San Carlos de Apoquindo 2200, Chile

* Corresponding author: hloyola{at}cchen.cl

Received April 25, 2008, amended July 2, 2008, accepted July 13, 2008

Gas multiplication factors were measured in a proportional counter filled with high-purity ethylene in the pressure range 10–40 Torr. The multiplication factors were measured as a function of the reduced electric field Sa. The results show that, within the range of the high values of reduced electric field applied in this work (2648 ≤ Sa ≤ 6455 V cm–1 Torr–1), the reduced first Townsend coefficient {alpha}/P for ethylene may still be considered a function of Sa alone. Good agreement was found with a model proposed by Akande.


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