Detection of alpha particles from 7Li(p,α)4He and 19F(p,α)16O reactions induced by laser-accelerated protons using CR-39 with potassium hydroxide–ethanol–water etching solution

Nishiura, Yosuke; Inoue, Shunsuke; Kojima, Sadaoki; Teramoto, Kensuke; Furukawa, Yoshiaki; Hashida, Masaki; Shimizu, Shuji

doi:10.1063/1.5098863

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…Because the penetration depth is much shorter than the distance in air, R 0 is very close to R. θ is the incident angle of α particles along the orange line in Figure 2. The depth S could be calculated by SRIM [36] with the parameter D and θ. S is the minimum detection depth on that etching condition (etching time, temperature) with PEW-25 solution and aluminum foil.…”

Section: An Approach To Estimate the Minimum Detection Range Of α Energymentioning

confidence: 99%

Detection of limited-energy α particles using CR-39 in laser-induced p −11B reaction

Wang

Deng

et al. 2023

Front. Phys.

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Due to the harsh radiation environment produced by strong laser plasma, most of the detectors based on semiconductors cannot perform well. So, it is important to develop new detecting techniques with higher detection thresholds and highly charged particle resolution for investigating nuclear fusion reactions in laser-plasma environments. The Columbia Resin No. 39 (CR-39) detector is mainly sensitive to ions and insensitive to the backgrounds, such as electrons and photons. The detector has been widely used to detect charged particles in laser-plasma environments. In this work, we used a potassium–ethanol–water (PEW) etching solution to reduce the proton sensitivity of CR-39, by raising the detection threshold for the research of laser-induced 11B(p, α)2α reaction. We calibrated the 3–5 MeV α particles in an etching condition of 60°C PEW-25 solution (17% KOH + 25%C2H5OH + 58%H2O) and compared them with the manufacturer’s recommended etching conditions of 6.25 N NaOH aqueous solution at 98°C in our laser-induced nuclear reaction experiment. The results indicate, with the PEW-25 solution, that CR-39 is more suitable to distinguish α tracks from the proton background in our experiment. We also present a method to estimate the minimum detection range of α energy on specific etching conditions in our experiment.

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Section: An Approach To Estimate the Minimum Detection Range Of α Energymentioning

confidence: 99%

Detection of limited-energy α particles using CR-39 in laser-induced p −11B reaction

Wang

Deng

et al. 2023

Front. Phys.

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“…Track registration property of PADC detectors are hardly affected by Low-LET (Linear Energy Transfer), radiations, electrons, X rays and gamma rays, at absorbed doses below about 10 kGy. This property has been used, in various branches of science and technology related to mixed radiation fields, for experiments on the inertial confinement fusion for instance [3], the diagnosis of ion beams from intense-laser plasma [4][5][6][7], dosimetry of space radiations [8][9][10], and the evaluation of local dose distribution in boron neutron capture therapy (BNCT) [11] notably. Despite a breadth of applications, a decade ago the fundamental mechanisms of latent track formation in PADCs remained to be explained.…”

Section: Background and Applicationsmentioning

confidence: 99%

Methodological and Conceptual Progresses in Studies on the Latent Tracks in PADC

Yamauchi¹,

Kanasaki²,

Barillon³

2021

Preprint

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Modified structure along latent tracks and track formation process have been investigated in poly(allyl diglycol carbonate), PADC, which is well recognized as a sensitive etched track detector. This knowledge is essential to develop novel detectors with improved track registration property. The track structures of protons and heavy ions (He, C, Ne, Ar, Fe, Kr and Xe) have been examined by means of FT-IR spectrometry, covering the stopping power region between 1.2 to 12,000 eV/nm. Through a set of experiments on low-LET radiations – such as gamma ray -, multi-step damage process by electron hits was confirmed in the radiation-sensitive parts of the PADC repeat-unit. From this result, we unveiled for the first-time the layered structure in tracks, in relation with the number of secondary electrons. We also proved that etch pit was formed when at least two repeat-units were destroyed along the track radial direction. To evaluate the number of secondary electrons around tracks, a series of numerical simulations were performed with Geant4-DNA. Therefore, we are proposing new physical criterions to describe the detection thresholds. Futhermore, we propose a present issue of the definition of detection threshold for semi-relativistic C ions. And as a possible chemical criterion, formation density of hydroxyl group is suggested to express the response of PADC.

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“…The track registration properties of PADC detectors are hardly affected by low- LET (Linear Energy Transfer), radiations, electrons, X rays and gamma rays, at absorbed doses below about 10 kGy. This property has been used, in various branches of science and technology related to mixed radiation fields, for experiments on the inertial confinement fusion for instance [ 3 ], the diagnosis of ion beams from intense-laser plasma [ 4 , 5 , 6 , 7 ], dosimetry of space radiations [ 8 , 9 , 10 ], and the evaluation of local dose distribution in boron neutron capture therapy (BNCT) [ 11 ] notably. Despite a breadth of applications, a decade ago the fundamental mechanisms of latent track formation in PADCs remained to be explained.…”

Section: Introductionmentioning

confidence: 99%

Methodological and Conceptual Progresses in Studies on the Latent Tracks in PADC

2021

View full text Add to dashboard Cite

Modified structure along latent tracks and track formation process have been investigated in poly (allyl diglycol carbonate), PADC, which is well recognized as a sensitive etched track detector. This knowledge is essential to develop novel detectors with improved track registration property. The track structures of protons and heavy ions (He, C, Ne, Ar, Fe, Kr and Xe) have been examined by means of FT-IR spectrometry, covering the stopping power region between 1.2 to 12,000 eV/nm. Through a set of experiments on low-LET radiations—such as gamma ray-, multi-step damage process by electron hits was confirmed in the radiation-sensitive parts of the PADC repeat-unit. From this result, we unveiled for the first-time the layered structure in tracks, in relation with the number of secondary electrons. We also proved that the etch pit was formed when at least two repeat-units were destroyed along the track radial direction. To evaluate the number of secondary electrons around the tracks, a series of numerical simulations were performed with Geant4-DNA. Therefore, we are proposing new physical criterions to describe the detection thresholds. Furthermore, we propose a present issue of the definition of detection threshold for semi-relativistic C ions. Additionally, as a possible chemical criterion, formation density of hydroxyl group is suggested to express the response of PADC.

show abstract

Detection of alpha particles from 7Li(p,α)4He and 19F(p,α)16O reactions induced by laser-accelerated protons using CR-39 with potassium hydroxide–ethanol–water etching solution

Cited by 7 publications

References 23 publications

Detection of limited-energy α particles using CR-39 in laser-induced p −11B reaction

Detection of limited-energy α particles using CR-39 in laser-induced p −11B reaction

Methodological and Conceptual Progresses in Studies on the Latent Tracks in PADC

Methodological and Conceptual Progresses in Studies on the Latent Tracks in PADC

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