The study of sensitivity and resolution of microautoradiography using Auger electrons

Takahashi, S.; Sato, O.

doi:10.1007/bf02039409

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Nuclear emulsions have been employed in many experiments for over a century as an efficient tool for detecting particle tracks. Studies conducted on nuclear emulsions with low energy electrons have been reported for many decades (for instance [1][2][3][4]). Recently, towards the realization of a matter-wave interferometry experiment with antimatter, the sensitivity of nuclear emulsions to positrons with energy between 9 and 18 keV was assessed as reported in [5].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of emulsion detectors to low energy positrons

et al. 2020

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Nuclear emulsions are a formidable tool for detecting charged particles with submicrometric spatial resolution, a feature which is essential in quantum interferometry experiments with antimatter. In this context, we have tested the sensitivity of such a detector, devoid of the usual protective layer, with very low energy positrons, that is in the range 0.2-17 keV. The results show that emulsions are sensitive to positrons with energy below 1 keV. Their detection efficiency increases as a function of the energy and it tends to saturate over ∼15 keV. This demonstrates the feasibility of using this type of detector in low energy regime and defines the limits of use for future gravitational studies with antimatter. K: Very low-energy charged particle detectors; Beam dynamics; Beam-line instrumentation (beam position and profile monitors; beam-intensity monitors; bunch length monitors); Detector alignment and calibration methods (lasers, sources, particle-beams) 1Corresponding author.

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Section: Introductionmentioning

confidence: 99%

Sensitivity of emulsion detectors to low energy positrons

et al. 2020

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A Microautoradiographic Method for Fresh-Frozen Sections to Reveal the Distribution of Radionuclides at the Cellular Level in Plants

Hirose

Kobayashi

Tanoi

et al. 2014

Plant and Cell Physiology

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Microautoradiography (MAR) is a conventional imaging method based on the daguerreotype. The technique is used to visualize the distribution of radionuclide-labeled compounds within a tissue section. However, application of the classical MAR method to plant tissue sections is associated with several difficulties. In this study, we report an MAR method applicable to fresh-frozen plant sections. Our method had two features: (i) the sample was kept frozen from plant tissue collection to radioisotope detection, making it possible to fix solutes without solvent exchange; and (ii) 1.2 µm thick polyphenylene sulfide film was inserted between the fresh-frozen plant section and the photosensitive nuclear emulsion to separate the section from the emulsion before autoradiography was conducted, which significantly improved the quality of the section until microscopic detection, the quality of the MAR image and the success rate. Then, the passage of cadmium (Cd) through vegetative rice stem tissue after 24 h of (109)Cd absorption was described for the first time using the MAR method. MAR clearly revealed the distribution of (109)Cd at the tissue level with high resolution. The (109)Cd concentration in phloem cells was found to be particularly high, whereas the xylem cells contained only small amounts of (109)Cd. The MAR method was also applicable for detecting (109)Cd and [(33)P]phosphate in roots. The MAR method developed here is expected to provide distribution images for a variety of compounds and ions in plant tissue.

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The study of sensitivity and resolution of microautoradiography using Auger electrons

Cited by 2 publications

References 13 publications

Sensitivity of emulsion detectors to low energy positrons

Sensitivity of emulsion detectors to low energy positrons

A Microautoradiographic Method for Fresh-Frozen Sections to Reveal the Distribution of Radionuclides at the Cellular Level in Plants

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