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Updated: Jul 3, 2026
07:28
Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
Published on: November 27, 2015
Multiplication factors in ethylene-filled proportional counters.
H Loyola1, L Birstein, A Hevia
1Comision Chilena de Energía Nuclear, Santiago, Nueva Bilbao 12501, Chile. hloyola@cchen.cl
Radiation Protection Dosimetry
|August 7, 2008
Summary
Gas multiplication factors in ethylene were studied using a proportional counter. Results indicate the reduced first Townsend coefficient is solely dependent on the reduced electric field at high field strengths.
Area of Science:
- Physics
- Physical Chemistry
Background:
- Proportional counters are essential gas detectors.
- Understanding gas properties is crucial for detector performance.
Purpose of the Study:
- To measure gas multiplication factors in high-purity ethylene.
- To investigate the relationship between multiplication factors and electric fields.
Main Methods:
- Experiments were conducted using a proportional counter.
- Ethylene gas was used at pressures ranging from 10 to 40 Torr.
- Gas multiplication factors were measured as a function of the reduced electric field (S(a)).
Main Results:
- The reduced first Townsend coefficient (alpha/P) for ethylene was found to be a function of S(a) alone.
- This dependency was observed within high reduced electric field values (2648–6455 V cm⁻¹ Torr⁻¹).
- Experimental results showed good agreement with Akande's model.
Conclusions:
- The study validates the behavior of the reduced first Townsend coefficient in ethylene under specific electric field conditions.
- Findings support the applicability of Akande's model for describing gas ionization phenomena in proportional counters.
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