Radiolysis of aqueous solutions with pulsed helium ion beams Yield of (SCN)2-formed by scavenging OH as a function of SCN-concentration

Chitose, Norihisa; Katsumura, Yosuke; Zuo, Zhiyuan; Domae, Masafumi; Ishigure, Kenkichi; Murakami, Takeshi

doi:10.1039/a703358c

Cited by 31 publications

(48 citation statements)

References 33 publications

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“…To elucidate the FLASH effect in more detail, roles played by water radiolysis products in earlier scavenging time scale (<7.4 ns) should be evaluated using the pulse radiolysis method. 36,37 Additionally, yields of other water radiolysis species will be investigated in near future. 38,39 The FLASH effect is multifactorial and proceeds from a delicate balance between dose, oxygen availability, reactions induced by radicals and DNA repair and the target cells intrinsic tolerance to peroxyl radicals.…”

Section: Discussionmentioning

confidence: 99%

Significant changes in yields of 7-hydroxy-coumarin-3-carboxylic acid produced under FLASH radiotherapy conditions

et al. 2020

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Section: Discussionmentioning

confidence: 99%

Significant changes in yields of 7-hydroxy-coumarin-3-carboxylic acid produced under FLASH radiotherapy conditions

et al. 2020

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“…Some time-resolved radiolysis systems have already been developed with linear accelerators. [3][4][5] However, most of these systems are not laboratory sized, and they deliver electron beams with electron energy too high for solid-state spectroscopy. Such restrictions have significantly slowed the progress of ultrafast radiolysis and the expansion of these variations.…”

Section: Institute For Molecular Science (Ims) Myodaiji Okazaki 444mentioning

confidence: 99%

Hybrid time-resolved spectroscopic system for evaluating laser material using a table-top-sized, low-jitter, 3-MeV picosecond electron-beam source with a photocathode

Suzuki

Kozeki

Ono

et al. 2002

Applied Physics Letters

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Articles you may be interested inAn innovative Yb-based ultrafast deep ultraviolet source for time-resolved photoemission experiments Rev. Sci. Instrum. 85, 123903 (2014); 10.1063/1.4903347 Development of a time-resolved attenuated total reflectance spectrometer in far-ultraviolet region Rev. Sci. Instrum. 83, 073103 (2012); 10.1063/1.4732846 Femtosecond time-resolved photoelectron spectroscopy with a vacuum-ultraviolet photon source based on laser high-order harmonic generation Rev. Sci. Instrum. 82, 063114 (2011); 10.1063/1.3600901 A tabletop femtosecond time-resolved soft x-ray transient absorption spectrometer Rev. Sci. Instrum. 79, 073101 (2008); 10.1063/1.2947737Time-resolved gain-spectrum measurement scheme using two potential laser media and a streak camera Rev.

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“…Increasing work is dealing with the determination of time-dependent yields of radicals during the radiolysis of aqueous systems through pulsed ion beams of high LET particles. Optical absorbance of radicals (SCN) 2 À or SO 4 À is used to measure at increasing scavenger KSCN or S 2 O 8 2À concentration the OH 144 and (e aq À H) yields, 145 respectively, resulting from the radical distribution and intra-track reactions caused by pulsed 24-MeV 4 He 2 ion beams (LET 35 eV nm À1 ). The radical cations MV have been used to compare the total radical yield, the OH radical yield, and the structure of tracks generated by 60 Co g-rays, 2^15 MeV H and 5^20 MeV 4 He 2 ion beams after radical scavenging by formate ion, with or without tert-butanol, and secondary reduction of methyl viologen.…”

Section: Linear Energy Transfer Effectsmentioning

confidence: 99%

7 Radiation chemistry

Belloni

Delcourt

Houée-Levin⊥

et al. 2000

Annu. Rep. Prog. Chem., Sect. C

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We try in this review to survey advances in all the aspects of Radiation Chemistry (the effects of high energy or ionizing radiation), both basic and applied, made during the period 1995^1999, after the last report issued at the end of 1994. 1 Classically, two main classes of studies are relevant. The ¢rst one includes the primary phenomena induced by the interaction of high-energy radiation with a chemical system. The way the energy is spatially deposited is indeed highly nonhomogeneous and depends on the type of radiation considered. Mutual reactions between the primary species produced also depend on their initial spatial distribution, and therefore on the energy absorption pattern. The kinetic aspects derive directly from the initial events following radiation absorption and thus, when observed at times as short as possible, give useful information on the early energy distribution for each of the radiation types, X-and g-photons, electrons and heavy particles, and, on the in£uence of their intensity and energy per particle.The second class of studies utilizes the background knowledge of radiation chemistry to generate and then to observe the fate of chemical transient species known to be involved in very important chemical or biochemical processes. Numerous data, such as the nature of reaction products, the absolute rate constants, the sequence of elementary reactions constituting a mechanism, and the thermodynamic and spectroscopic properties of short-lived species have been attained. This kind of study of transients and reaction mechanisms, which can be approached only by pulse techniques (essentially pulse radiolysis or laser photolysis, each with its speci¢c advantages), constitutes the new ¢eld of fast to ultrafast chemistry. It concerns extended domains of physical, organic, inorganic, and bio-chemistry. Moreover, the understanding of mechanisms is quite helpful in suggesting new ways of synthesis or degradation induced by irradiation and is now extensively used in developing various speci¢c processes in applied chemistry. The number of studies on the chemical mechanisms and in applied radiation chemistry constitutes an increased fraction of the total publications in radiation chemistry, which we estimate to be around 4000 over the period considered (almost constant compared to the preceding 5-year

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Radiolysis of aqueous solutions with pulsed helium ion beams Yield of (SCN)2-formed by scavenging OH as a function of SCN-concentration

Cited by 31 publications

References 33 publications

Significant changes in yields of 7-hydroxy-coumarin-3-carboxylic acid produced under FLASH radiotherapy conditions

Significant changes in yields of 7-hydroxy-coumarin-3-carboxylic acid produced under FLASH radiotherapy conditions

Hybrid time-resolved spectroscopic system for evaluating laser material using a table-top-sized, low-jitter, 3-MeV picosecond electron-beam source with a photocathode

7 Radiation chemistry

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