La capture L et la mesure du rapport capture L/capture k . Quelques expériences sur 79 Kr. Discussion de l'état actuel de la question

Abstract

L to K capture ratio of 79Kr was measured with a cloud chamber and with a proportional counter and found to be higher than expected theoretical value. Possible reasons for such a disagreement are discussed. Other results would not be in contradiction with hypothesis of a systematic discrepancy with theory.

Orbital electron capture by the nucleus

“…In earlier days,-some L/K capture ratios were determined by measuring trajectories produced in a cloud chamber by K.and L events from a radioactive gas (Radvanyi, 1952a(Radvanyi, , 1955a. This approach is included in Table 3.1 for historical reasons as Method 4.…”

“…Experimentally, total K x-ray escape has been approximated with single-wire proportional counters filled with a low-Z gas at low pressure (Pontecorvo et al, 1949;Langevin, 1954tl955, 1956Langevin and Radvanyi, 19548 1955;Radvanyi, 1955a;Scobie, 1957aKiser andJohnston, 1959). Corrections are needed to account for (1) non-escape of K x rays, (2) escape of L x rays, (3)wall and end effects, (4) .…”