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The decay of As 73 to Ge 73 has been investigated with scintillation counters. The K capture is followed by a 53.9-kev gamma ray which in turn is followed by a 13.5-kev transition to the ground state. The total conversion coefficient of the 53.9-kev gamma is 4.7 and the lifetime is between 900...
The relativistic corrections to the Lamb shift, i.e., terms of order α ( Z α ) 5 m c 2 , are calculated. For this purpose, the Lamb shift is separated into one term in which the Coulomb potential acts only once, and another term in which it acts two or more times (Sec. II). The one-potential...
The thermoelectric power Q of a semiconductor is found by calculating the Thomson coefficient σ T from electrical and thermal current density expressions and then integrating the relation σ T = T dQ dT . This procedure yields a general expression for Q in terms of the Fermi level, forbidden...
A technique is described for selecting from the interactions produced by a bremsstrahlung spectrum only those arising from essentially monoenergetic quanta. These interactions are selected by requiring a coincidence with the degraded electron which produced the interacting quanta. A study of the...
We have studied the instantaneous distribution of particles in extensive air showers at sea level by measuring the relative delays between particles with three liquid scintillation counters. The delays measured were in the range from 5 to 300 mμsec. The sizes of the showers were in the range...
A general analysis of the energy spectrum resulting from the degradation of ionizing radiations is presented in part A (Secs. 2-6) and of the range-energy straggling in part B (Secs. 7-13). A method for calculating the energy spectrum is developed, which requires that the differential cross...
The fission yields of the stable isotopes of xenon and krypton in natural fission have been determined for six samples of pitchblende and one sample of uraninite. The fission yields observed varied markedly from sample to sample. The nature of these variations and particularly the changes that...
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