Partial ionization cross sections of isobutanol

Abstract: The electron and positron impact partial ionization cross sections (PICS) for isobutanol were calculated using variants of the binary encounter Bethe model (BEB). The modified BEB (mBEB) model and the mass spectrum dependent (MSD) method are used to calculate the PICS of cationic fragments of isobutanol. Also for calculating the positron impact ionization and dissociative ionization cross sections, we have used the BEB-0 model and the BEB-W model which are scaled Wannier threshold laws along with the BEB-A and BEB-B models which obey Jansen's threshold law. The study also compares the PICS calculated from other isomers of butanol presented in the literature. We also presented the synthetic electron impact mass spectrum of isobutanol which is compared with the experimental measurements.