Comparative Studies of the Influence of Visible and Beta-Gamma Radiations on the Discharge Current in Chlorine under Ozonizer Excitation

可見光及貝他伽瑪射線對氯在臭氧激發下放電電流之影響

Jagdish Prashad

《中央研究院化學研究所集刊》 30期 (1983/03) Pp. 69-72

https://doi.org/10.6522/BICAS.1983.30.9

並列摘要

The analogy (or otherwise) between the effects (∆i) of visible and beta-gamma radiations on the discharge current i has been investigated in chlorine under ozonizer excitation. The magnitude of both net and relative betag-amma effects are comparatively less than those with visible. As the activity of the emanation is increased, ±∆ increases gradually at constant V and attains saturation at large activities-an observation akin to the variation of the Joshi effect (photo-enhancement of i, +∆i and photo-diminution of I, -∆i) ±∆ with intensity of visible radiations. Similar to the inversion of +∆i into -∆i with the applied potential V and intensity of the visible light, inversion of +∆i into -∆i due to beta-gamma and gamma rays with V and the activity of the emanation has been observed. The above analogy supports the emanation has been observed. The above analogy supports the standpoint that volume ionization is not the seat of -∆i. The occurrence of the latter, especially under irradiation of the momentary anode with either of these radiations, suggested a mechanism common to the two types of radiations. This being the positive ion mechanism. which involves the quenching action of the positive ion space charge formed at the momentary anode and which, thus regards it as a space charge effect. +∆i appeared to be due to the formation of the active centres, which were assumed to be responsible for the photosensitivity of G-M counters. These active centres perhaps undergo a chemical change, especially under external irradiation, with the emission of ions and electrons causing +∆i.