TY - JOUR
T1 - Possibility of screen-type X-ray film for observation of heavy cosmic-ray primaries
AU - Ichimura, Masakatsu
AU - Kamioka, Eiji
AU - Kitazawa, Motoyasu
AU - Kirii, Keisuke
AU - Kobayashi, Tadashi
AU - Shibata, Toru
AU - Kogawa, Masataka
AU - Kuramata, Shuichi
AU - Matsutani, Hideya
AU - Murabayashi, Takayuki
AU - Nanjyo, Hirotada
AU - Watanabe, Zenjiro
AU - Sugimoto, Hisahiko
AU - Nakazawa, Kazuma
PY - 1991/1/15
Y1 - 1991/1/15
N2 - This article discusses the possibility of screen-type X-ray film for the observation of heavy cosmic-ray primaries. We investigate in detail the optical characteristics of the intensifying screen Gd2O2S:Tb, and perform a simulation calculation for three-dimensional diffusion of scintillation light emitted from numerous δ-rays (knockon electrons produced by a heavy primary) in the screen. On the basis of these theoretical speculations, we report the experimental results obtained recently by a balloon-borne emulsion chamber with full use of the screen type X-ray film, focusing to the charge resolution of heavy primaries and their flux with energy larger than the rigidity cutoff at Sanriku latitude, Ec∼ 4 GeV/n. All results show that the emulsion chamber with multilayered screen-type X-ray film is quite valid and powerful for the observation of heavy cosmic-ray primaries.
AB - This article discusses the possibility of screen-type X-ray film for the observation of heavy cosmic-ray primaries. We investigate in detail the optical characteristics of the intensifying screen Gd2O2S:Tb, and perform a simulation calculation for three-dimensional diffusion of scintillation light emitted from numerous δ-rays (knockon electrons produced by a heavy primary) in the screen. On the basis of these theoretical speculations, we report the experimental results obtained recently by a balloon-borne emulsion chamber with full use of the screen type X-ray film, focusing to the charge resolution of heavy primaries and their flux with energy larger than the rigidity cutoff at Sanriku latitude, Ec∼ 4 GeV/n. All results show that the emulsion chamber with multilayered screen-type X-ray film is quite valid and powerful for the observation of heavy cosmic-ray primaries.
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U2 - 10.1016/0168-9002(91)90451-U
DO - 10.1016/0168-9002(91)90451-U
M3 - Article
AN - SCOPUS:0010864594
VL - 300
SP - 374
EP - 394
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 2
ER -