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Unfavored factors U , that is, ratios of computed-to-observed transition probabilities, are tabulated in a systematic manner for allowed β transitions in the strict j - j coupling scheme. The introduction of many-particle wave functions lowers the gap between favored and unfavored transitions,...
Neutron-capture γ -ray spectra have been measured in the energy range 0.3 to 3 Mev by means of a two-crystal Compton scintillation spectrometer. The efficiency of the instrument as a function of energy was determined experimentally. The uniqueness of the 2.23-Mev γ ray following capture of a...
The masses of all stable isotopes in the range 10 ≤ A ≤ 30 have been measured using the large double-focusing mass spectrometer recently constructed at this laboratory. No serious discrepancies are found between the present results and other mass spectroscopic measurements except at Ne 20 ....
A semiempirical analysis of the superexchange interactions responsible for the formation of the magnetic lattices in Cr 2 O 3 and α - Fe 2 O 3 is given. The difference between the two magnetic lattices is attributed to the fact that Cr + 3 has a less-than-half-full d -shell and Fe + 3 a...
The most general form of the Hamiltonian of an electron or hole in a semiconductor such as Si or Ge, in the presence of an external homogeneous magnetic field, is given. Two methods of obtaining the corresponding energy levels are discussed. The first should yield very accurate values for the...
Doublets leading to mass values of the stable isotopes from C 12 to Ne 22 have been measured with a double-focusing mass spectrometer. In the determination of C 12 , two new cycles have been used, (½ C 4 H 4 O- O 18 O)-( H 3 O-H O 18 ) and (½ C 4 H 2 O- O 17 O)-( H 3 O- H 2 O 17 ), resulting in...
The possibility that a simply connected perfectly conducting fluid body could generate an increasing external magnetic field by acting as a self-excited dynamo is demonstrated by exhibiting a cycle of motions that doubles the external field each cycle. The essential feature of the motion is that...
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