New insight on the simultaneous H2and HNO2production in concentrated HNO3aqueous solutions under alpha radiation

Musat, Raluca; Roujou, J.L.; Dauvois, V.; Ferry, M.; Marchand, Carole; Baldacchino, Gérard

doi:10.1039/d0ra10061g

Cited by 4 publications

(2 citation statements)

References 103 publications

(96 reference statements)

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“…Currently, chemical effects in BP can address many topics in fields of primary concern: radiation protection and dosimetry 20 , space radiation protection 6 , 21 , alpha rays in nuclear industry 22 , alpha and Boron neutron capture therapy (BNCT) 23 , 24 . To take advantage or to protect from damage occurring in BP, understanding the radiation chemistry in this region with a high spatial resolution is necessary.…”

Section: Introductionmentioning

confidence: 99%

Intermediate LET-like effect in distal part of proton Bragg peak revealed by track-ends imaging during super-Fricke radiolysis

Audouin,

Hofverberg,

Ngono-Ravache

et al. 2023

Sci Rep

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Upstream of the efficiency of proton or carbon ion beams in cancer therapy, and to optimize hadrontherapy results, we analysed the chemistry of Fricke solutions in track-end of 64-MeV protons and 1.14-GeV carbon ions. An original optical setup is designed to determine the primary track-segment yields along the last millimetres of the ion track with a sub-millimetre resolution. The Fe3+-yield falls in the Bragg peak to (4.9 ± 0.4) × 10–7 mol/J and 1.9 × 10–7 mol/J, under protons and carbon ions respectively. Beyond the Bragg peak, a yield recovery is observed over 1 mm for proton beams. It is attributed to the intermediate-LET of protons in this region where their energy decreases and energy distribution becomes broader, in relation with the longitudinal straggling of the beam. Consequently to this LET decrease in the distal part of the Bragg peak, Fe3+-yield increases. For the first time, this signature is highlighted at the chemical level under proton irradiation. Nevertheless, this phenomenon is not identified for carbon ion beams since their straggling is lower. It would need a greater spatial resolution to be observed.

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Section: Introductionmentioning

confidence: 99%

Intermediate LET-like effect in distal part of proton Bragg peak revealed by track-ends imaging during super-Fricke radiolysis

Audouin,

Hofverberg,

Ngono-Ravache

et al. 2023

Sci Rep

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show abstract

“…Currently, chemical effects in BP can address many topics in fields of primary concern: radiation protection and dosimetry 20 , space radiation protection 6,21 , alpha rays in nuclear industry 22 , alpha and BNCT therapy. 23,24 To take advantage or to protect from damage occurring in BP, understanding the radiation chemistry in this region with a high spatial resolution is necessary.…”

Section: Introductionmentioning

confidence: 99%

Post-Bragg Peak keV-Secondary Electron Radiolysis Revealed by Track-Ends Imaging of High-Energy Protons.

Audouin

Hofverberg

Ngono-Ravache

et al. 2023

Preprint

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Upstream of the efficiency of proton or carbon ion beams in cancer therapy, and to optimize hadrontherapy results, we analysed the chemistry of Fricke solutions in track-end of 64-MeV protons and 1.14-GeV carbon ions. An original optical setup is designed to determine the primary track-segment yields along the last millimetres of the ion track with a sub-millimetre resolution. The Fe3+-yield falls in the Bragg peak to (4.9±0.4)×10-7 mol/J and 1.9×10-7 mol/J, under protons and carbon ions respectively. Beyond the proton Bragg peak, a yield recovery is observed over 1 mm. It is attributed to the proton beam straggling. Since a dose rate effect is ruled out in this region, keV secondary electrons are hypothesized to produce this intermediate LET effect. They might also provide DNA lesions during proton exposure, potentially at the origin of delayed radio-induced carcinogenesis.

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Femtosecond laser-induced photochemical synthesis of gold nanoparticles in nitrate solution

Putri

Fadli²,

Umaroh

et al. 2022

Radiation Physics and Chemistry

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New insight on the simultaneous H₂and HNO₂production in concentrated HNO₃aqueous solutions under alpha radiation

Abstract: For the first time ever, a specially designed set-up, coupled to the CEMHTI cyclotron allowed in situ monitoring of HNO2 and precise determination of H2 production in the external α radiolysis of HNO3 solution, while ensuring no perturbation of the investigated system.

Cited by 4 publications

References 103 publications

Intermediate LET-like effect in distal part of proton Bragg peak revealed by track-ends imaging during super-Fricke radiolysis

Intermediate LET-like effect in distal part of proton Bragg peak revealed by track-ends imaging during super-Fricke radiolysis

Post-Bragg Peak keV-Secondary Electron Radiolysis Revealed by Track-Ends Imaging of High-Energy Protons.

Femtosecond laser-induced photochemical synthesis of gold nanoparticles in nitrate solution

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