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Hitherto unknown in light elements, a new reaction involving the emission of a proton and an alpha-particle has been observed by bombarding aluminum with 14-Mev deuterons. By an analysis of its excitation function, it is shown that the activity is not generated by the wellknown ( n , α )...
The free electrical charges on individual precipitation particles were measured at various altitudes up to 26,000 feet by an induction method that avoided touching them. In a weak cold front exhibiting no thunderstorm activity, and having the freezing level at 11,000 feet, positive charges...
Some years have passed since the appearance of Dirac's striking interpretation of the Heisenberg-Schroedinger parallelism in the equations of motion, and yet it appears that there still remain obscure points which have led to misunderstanding. Although the Schroedinger method suffices to deal...
The slow neutron velocity spectrum of Au, In, Ta, W, Pt, and Zr have been investigated. The results for Au and In check the values previously obtained using the "old" system. The results for the gold level at (4.8±0.1)ev with σ 0 Γ 2 = 600 , and for the main indium level at (1.44±0.02) ev...
The probability of ionization of an impurity level by thermal agitation in a semi-conductor is estimated by the use of a simple Debye model. It is found that the probability of ionization by one phonon decreases exponentially with the depth of the impurity level below the conduction band,...
The direct production of RaE and Po by deuteron bombardment of bismuth has been reinvestigated. Present results indicate that as the deuteron energy is lowered from 8.8 to 7.3 Mev, the production ratio of RaE/Po increases 25 percent but as the deuteron energy is dropped from 7.3 Mev to 5.5 Mev,...
Expressions very similar to the "Breit-Wigner" formulas are derived for the scattering and absorption cross section of nuclear particles, e.g. neutrons, protons, etc. The resonance energies, particle widths and other characteristic features can be expressed in terms of the logarithmic derivative...
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