Stopping cross sections of oxygen for 0.3-2.0-MeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>particles in saturated alcohols and ethers

Abstract

The stopping cross sections of three saturated alcohols, C${\mathrm{H}}_{3}$OH, ${\mathrm{C}}_{2}$${\mathrm{H}}_{5}$OH, and ${\mathrm{C}}_{3}$${\mathrm{H}}_{7}$OH, and two saturated ethers, (C${\mathrm{H}}_{3}$)$_{2}\mathrm{O}$ and (${\mathrm{C}}_{2}$${\mathrm{H}}_{5}$)O, have been measured in a differentially pumped gas cell with probable random errors of 0.5-1.1%. The results confirm that $\ensuremath{\epsilon}(\mathrm{C}{\mathrm{H}}_{2})$ quoted in a previous paper can be used to predict the stopping cross sections for single-bonded C-H-O compounds. The values for the stopping cross section of single-bonded oxygen are extracted and found to be 3-17% lower than $(\frac{1}{2}){\ensuremath{\epsilon}}_{\mathrm{expt}}({\mathrm{O}}_{2})$, thereby demonstrating the effect of chemical bonding on the stopping cross section. Comparison is made between the stopping cross sections for oxygen and those calculated from metal-oxide yield ratios.