Kenjiro Kondo

TL;DR: In this paper, the effects of radiation on BGO crystals were investigated and it was shown that BGO has more than two orders of magnitude higher resistance against low energy γ rays than SF5 lead glass.

TL;DR: In this article, a radiation damage effect on silicon strip detectors of pn-junction type is investigated using a high energy proton beam using a few Mrads of radiation, and several variations of strip detectors with different surface structures were made and tested.

TL;DR: In this article, the effects of positron irradiation on polypropylene (PP) and polyethylene (PE) have been studied using the positron source for positron annihilation (PA) experiments.

TL;DR: In this paper, the high-resolution Doppler-broadening energy spectra of positron annihilation gamma rays has been obtained by measuring the coincidences of the two photons, and the enhancement effect may be due to the trapping of positrons by the polar C + O − groups.

TL;DR: In this article, the irradiation effect of γ-rays on polyethylene (PE) has been studied by positron annihilation lifetime spectroscopy (PALS) in the case of non-irradiated PE samples, at a low temperature below the glass transition temperature, increases due to an increase in the concentration of trapped electrons.