City Research Online

Abstract

Measurements have been carried out of the molecular stopping power for alpha- particles over the energy range 1 to 8 Mev of oxygen, water, methyl, ethyl and propyl alcohols, dichloromethane, trichloromethane and carbontetrachloride in the liquid and vapour states, These results are compared with calculated stopping power values and discussed with reference to the charge state of the alpha-particles at various energies. The methods used include a new technique for measurements with liquids.
The molecular stopping powers of all materials in the vapour phase are found to be significantly higher than those in the corresponding liquid phase except for CH₂Cl₂ (above 2 Mev), CHCl₃, and CCl₄.
Stopping cross sections for oxygen, - CH₂ -, - C - and - Cl – have been determined from the experimental measurements using Bragg's Rule.

Publication Type:	Thesis (Doctoral)
Subjects:	Q Science Q Science > QC Physics Q Science > QD Chemistry
Departments:	School of Science & Technology School of Science & Technology > School of Science & Technology Doctoral Theses Doctoral Theses

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