Biological effectiveness on live cells of laser driven protons at dose rates exceeding 109 Gy/s

D Doria, KF Kakolee, S Kar, SK Litt, F Fiorini, H Ahmed, S Green, JCJ Jeynes, J Kavanagh, D Kirby, KJ Kirkby, MJ Merchant, G Nersisyan, R Prasad, KM Prise, G Schettino, M Zepf, M Borghesi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The ultrashort duration of laser-driven multi-MeV ion bursts offers the possibility of radiobiological studies at extremely high dose rates. Employing the TARANIS Terawatt laser at Queen???s University, the effect of proton irradiation at MeV-range energies on live cells has been investigated at dose rates exceeding 109 Gy/s as a single exposure. A clonogenic assay showed consistent lethal effects on V-79 live cells, which, even at these dose rates, appear to be in line with previously published results employing conventional sources. A Relative Biological Effectiveness (RBE) of 1.4??0.2 at 10% survival is estimated from a comparison with a 225kKVp X-ray source.
    Original languageEnglish
    Pages (from-to)011209-011215
    Number of pages7
    JournalAIP Advances
    Volume2
    Issue number1
    DOIs
    Publication statusPublished - 22 Mar 2012

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