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

  • D. Doria
  • , K. F. Kakolee
  • , S. Kar
  • , S. K. Litt
  • , F. Fiorini
  • , H. Ahmed
  • , S. Green
  • , J. C. G. Jeynes
  • , J. Kavanagh
  • , D. Kirby
  • , K. J. Kirby
  • , C. L. Lewis
  • , M. J. Merchant
  • , G. Nersisyan
  • , R. Prasad
  • , K. M. Prise
  • , G. Schettino
  • , M. Zepf
  • , M. Borghesi

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112 Citations (Scopus)
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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 225 kVp X-ray source.
Original languageEnglish
Article number011209
Number of pages6
JournalAIP Advances
Volume2
Issue number1
DOIs
Publication statusPublished - Mar 2012

ASJC Scopus subject areas

  • General Physics and Astronomy

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