Cross Sections for Positron Impact with 2,2,4-Trimethylpentane

Luca Chiari, Antonio Zecca, Francisco Blanco, Gustavo Garcia, Michael Perkins, S Buckman, Michael Brunger

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    Abstract

    2,2,4-Trimethylpentane (C 8 H 18 ), a hydrocarbon produced all over the world on a large scale in the processing of crude oil, has long been known and used in the energy sector. It has also recently attracted the attention of the radiation physics and chemistry community, owing to its applications in medical imaging techniques. Charged-particle interactions with this species unfortunately remain mostly unknown. In this study, we report on measured total cross sections for positron scattering from 2,2,4- trimethylpentane in the energy range from 0.12 to 50 eV. We also present calculations of the total cross sections, elastic integral and differential cross sections, positronium formation cross sections, and inelastic integral cross sections at energies from 1 to 1000 eV using the independent atom model with screening corrected additivity rule. A knowledge of those scattering cross sections might, through simulation models, help to improve the accuracy of current radiation detection devices and hence provide better estimates of the extent of any charged-particle-induced damage in biomolecular systems.

    Original languageEnglish
    Pages (from-to)6466-6472
    Number of pages7
    JournalJournal of Physical Chemistry A
    Volume118
    Issue number33
    DOIs
    Publication statusPublished - 21 Aug 2014

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