Title :
Optical observation of self-quenching streamers by α- and β-rays
Author :
Nohtomi, A. ; Narita, K. ; Uozumi, Y. ; Sakae, T. ; Matoba, M. ; Koori, N. ; Kume, H. ; Nakamura, H.
Author_Institution :
Dept. of Nucl. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
8/1/1994 12:00:00 AM
Abstract :
Optical images of self-quenching streamers (SQSs) in a gas counter have been observed for α- and β-rays, incident charged particles. Individual images of the streamers were obtained by using an image-intensifier system with a gating function. The observation was performed from the axial direction of the gas counter used. For α-ray irradiation, streamers develop only in two specific directions orienting primary-ionization tracks formed by α-rays. On the other hand, for β-ray, streamers grow in various directions; obtained images are similar to those for X-rays. On the basis of the observation, SQS-formation mechanisms by different sorts of ionizing radiation are discussed. A possible mechanism of “primary-ionization track oriented (PRITOR) type SQS” induced by α-rays is proposed
Keywords :
alpha-particle detection and measurement; beta-ray detection and measurement; image intensifiers; particle detectors; streamer chambers; α-rays; β-rays; PRITOR; axial direction; charged particles; gas counter; gating function; image-intensifier system; ionizing radiation; optical images; primary-ionization track oriented type; primary-ionization tracks; self-quenching streamers; Anodes; Argon; Atmospheric modeling; Filling; Ionizing radiation; Optical pulses; Radiation detectors; Streaming media; Wire; X-ray imaging;
Journal_Title :
Nuclear Science, IEEE Transactions on
