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In an attempt to verify the theory of the long spark of Loeb and Meek, d.c. sparking potentials in a plane parallel gap in air have been measured as a function of plate separation and pressure at and below atmospheric pressure. Below atmospheric pressure, the sparking-potential curve as a...
The 12-channel slow neutron velocity spectrometer at Cornell University is described. Reported here is a measurement with this spectrometer of the neutron cross section of iodine over an energy range extending from 0.0026 to 1000 ev. Below 3 ev, the iodine cross section was found to obey the 1/v...
A detailed discussion of the energy loss of negative mesotrons in matter is presented. The energy range considered is from +2000 ev to the lowest quantized orbit of the mesotron. The most important mechanism for energy loss is that of electron collisions except very near the nucleus, where...
Some information has been obtained on the spin dependence of scattering of slow neutrons by Be, Al, and Bi by measuring the scattering cross section for filtered neutrons. The result is that in none of these three cases does the sign of the scattering length change when the spin orientation is...
The S 5 state of carbon is important in thermo-chemical theory, and its position has been the subject of much speculation. Evidence is here given that it is 33735.2 cm - 1 above the ground state P 3 and combines with it to emit two lines at λ 2965 and 2967.
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