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Continuing previous studies on minute ferromagnetic impurities in ordinary metals, an attempt was made to render such impurities non-magnetic through heat treatment. In the case of copper and brass it was found that heating to 900°C and 750°C, respectively, in hydrogen for two hours or more,...
On the photographic plates of the C O 2 spectrum made by S. Mrozowski from the 30-foot, 30,000 lines per inch, Chicago grating, were found pictures of the first negative bands and the comet tail bands of C O + in which the Σ 2 spin splittings were resolved. From the Σ 2 → Σ 2 transition, the...
The magnetization of the paramagnetic alloys of copper with nickel has been studied as a function of temperature and applied field. It is found that a Curie-Weiss equation cannot represent the results and an equation of the form χ = a T + b + ( c T ) is found to be satisfactory. Alloys in the...
Pankhurst has described a band spectrum believed by him to belong to an oxide of silicon, possibly Si O 2 . A better excitation of the same bands has been obtained from a similar source (a high voltage uncondensed discharge through a constriction in a quartz tube), but in helium gas instead of...
An apparatus is described for making direct measurements of the loss of forward velocity of argon ions in single encounters with helium atoms. Results are given in the form of collision cross sections for given percentage retardations, for ions of energies of 1000, 800, 600, 400, and 200 ev. The...
Schwinger's modification of the Møller-Rosenfeld theory of nuclear forces based on a mixture of pseudoscalar and vector meson field is investigated in the strong coupling theory. The isobar separation turns out to be 1 3 of its value in the pseudoscalar theory. The interaction energy between two...
Forms of the beta-decay interaction are sought which are totally symmetric and totally antisymmetric to the interchange of any two of the particles involved in the emission. It is found that there is no symmetric interaction and one antisymmetric. The antisymmetric interaction allows transitions...
In the voltage range from 0.7 to 2.5 Mv, the intensity and the total mass absorption coefficient of the heterogeneous radiation produced in a thick gold target have been measured as a function of tube voltage, angle with respect to the electron beam, and thickness and material of the filter....
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