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Showing papers in "Reviews of Modern Physics in 1959"







Journal ArticleDOI
L. G. Parratt1
TL;DR: Advantages and disadvantages of x-ray spectroscopy are enumerated in this article, where two energy regions of the method are discussed in reference to differences, resolving power, corrections, and diagrams.
Abstract: Advantages and disadvantages of x-ray spectroscopy are enumerated. The two energy regions of the method are discussed in reference to differences, resolving power, corrections, and diagrams. Discussions of the extended structures and discrete loss of energy of electrons are presented. Emission bands for sodium, magnesium, aluminum, nickel, copper, and zinc are discussed. (C.J. G.)

324 citations


Journal ArticleDOI

251 citations


Journal ArticleDOI
TL;DR: In this article, the authors apply the wing theorem and quantum theory to obtain numerical estimates for the Balmer lines, including those with high quantum numbers, and present basic formulas for simultaneous broadening by ions and electrons in adiabatic approximation.
Abstract: Plasma line broadening is discussed with attention restricted to emission. The statistical theory and the impact theory are applied and discussed as to limits of each and circumstances under which each is best applied. Adiabatioity, perturber interactions, and treatment for radiating ions are expressed in mathematical formulas. The wing theorem and quantum theory are applied to achieve numerical estimates for the Balmer lines, including those with high quantum numbers. Broadening by electrons only is discussed relative to adiabatic theory and Lyman lines. Basic formulas for simultaneous broadening by ions and electrons in adiabatic approximation are presented. Plasma properties are discussed in relation to experimental determinations. (C. J. G.)

221 citations



Journal ArticleDOI
TL;DR: A review of polarization sensitive processes and different methods for measurements of polarization of nuclear gamma rays is given in this article, where experimental results are presented in tabular form, the various processes being classified according to the type of orientation which is produced, either alignment or polarization.
Abstract: A review of polarization-sensitive processes and different methods for measurements of polarization of nuclear gamma rays is given. Experimental results are presented in tabular form, the various processes being classified according to the type of orientation which is produced, either alignment or polarization. The possible polarization correlation for each case is listed. (C.J. G.)

195 citations





Journal ArticleDOI
TL;DR: In this article, Kapur and Peierls' compound-nucleus model is used to explain the inelastic scattering of nucleons by complex nuclei and the giant dipole photo effect.
Abstract: Several modifications of the compound-nucleus theory are presented by employing the formalism of Kapur and Peierls. In the explanation for giant resonances in the extreme compound-nucleus picture, a complex well is used to represent the nucleus. The predictions of the compoundnucleus model, supplemented by statistical assumptions, are used to explain the inelastic scattering of nucleons by complex nuclei and the giant dipole photoeffect. From an exact description in terms of nuclear-dispersion theory a unified description of the above phenomena is given. The scattering amplitude is separated into terms corresponding to direct interactions and compound-nucleus processes.








Journal ArticleDOI
TL;DR: In this article, a survey of the possibility of accounting for strange particle decays by the addition of further terms of a weak interaction current J/sub mu /, but which do not conserve strangeness.
Abstract: A survey is given for the possibility of accounting for strange particle decays by the addition of further terms of a weak interaction current J/sub mu / , but which do not conserve strangeness. Pionic decay modes for strange particles are described in terms of the current J/sub mu / and four-fermion coupling of the form V-A. The possibility of isotopic spin relationships in weak decay processes has been considered in connection with the isotopic spin character of the weak interaction currents. Leptonic modes of strange particle decay are discussed. (C.J.G.)








ReportDOI
TL;DR: In this paper, the basic information about the path of carbon in photosynthesis is reviewed together with the methods that were used to discover it, and some principoles of ordered structure are devised for the types of molecules to be found in the chloroplasts.
Abstract: The basic information about the path of carbon in photosynthesis is reviewed together with the methods that were used to discover it. This has led to the knowledge of what is required of the photochemical reaction in the form of chemical species. Attention is then directed to the structure of the photochemical apparatus itself insofar as it is viewable by electron microscopy, and some principoles of ordered structure are devised for the types of molecules to be found in the chloroplasts. From the combination of these, a structure for the grana lamella is suggested and a mode of function proposed. Experimental test for this mode of function is underway; one method is to examine photoproduced unpaired electrons. This is discussed.