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AbstractAbstract
[en] A key assumption in the usual computations of Doppler broadening is to ignore the dependence of Γ(j) on the state of the compound nucleus. This is an excellent approximation for the γ-emission contribution to Γ(j). It is not so clear that it is as good for the neutron contribution. In this paper, we derive an expression for Γn(j) and show that the effect of the dependence of Γn(j) on the intermediate energy of the target εj is not significant for an ideal gas, so that the absorption line shape is identical to the absorption line shape in which Γn is constant. Therefore, the effects of j dependence Γn(j) on the absorption cross section is not significant. (author). 7 refs., 1 tab., 2 figs
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Translated from Annals of Nuclear Energy (1989) v. 16(6) p. 263-270.
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Journal Article
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Translation
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Aalam Al-Zarra; CODEN AAALE; (no.11); p. 6-12
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AbstractAbstract
[en] The current status of knowledge of the sonoluminescence mechanism is reviewed. It is shown that the origin of sonoluminescence in multibubble cavitation fields is best described by the local charging theory of cavitation bubbles. For certain acoustic field configurations, a single stably pulsating cavitation bubble develops, which differs from its 'ordinary' counterparts in a number of respects, and whose sonoluminescence is a thermal effect in contrast to the luminescent glow of the ensemble of 'cold' cavitation bubbles. A model of single-bubble sonoluminescence is proposed, which includes the additional resonance absorption of energy by a solitary cavitation bubble in a symmetric acoustic field. The mechanisms of some single-bubble effects are as yet not clear. (reviews of topical problems)
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Available from http://dx.doi.org/10.1070/PU2000v043n03ABEH000455; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Physics Uspekhi; ISSN 1063-7869;
; v. 43(3); p. 259-282

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Wague', A.
International Centre for Theoretical Physics, Trieste (Italy)1986
International Centre for Theoretical Physics, Trieste (Italy)1986
AbstractAbstract
[en] A further analysis of diagonalization approximation is made in the multichannel resonant photoionization of two-electron systems near the n=3 threshold of reduced hydrogenic ion. We have obtained excitation energies partial and total eigenwidths of a few 1p(-) and 3p(-) low-lying resonances in He and some He-like ions. A comparison of our calculations with experimental data and with the results obtained using other approximations-like close-coupling calculations, enables one to assess the applicability of the diagonalization approximation for solving the multichannel resonant photo-ionization problem. (author)
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Sep 1986; 23 p; 27 refs, 1 fig, 5 tabs.
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Report
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AbstractAbstract
No abstract available
Original Title
Beruecksichtigung von nichtmoderierten Stoessen (IM) im Huellrohr bei der Resonanzabsorption
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Journal Article
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Progress Report
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Atomwirt., Atomtech; v. 15(8); p. 399-400
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AbstractAbstract
[en] It is known that ultrashort pulse coherent propagation through the resonant absorbing medium leads to the pulse splitting and pulse train generation. First of these pulses is the input pulse and the following pulses are resonant medium response. It is also known that such a propagation mode leads to the «spectrum condensation» effect, at which broad-band input femtosecond laser emission, as it leaves opically-dense medium, centralized in the vicinity of the resonance absorption lines. It’s interesting to clear up the dependence of a condensation effect on an input femtosecond pulse phase modulation value (chirp). (paper)
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International Conference PhysicA.SPb/2017; Saint-Petersburg (Russian Federation); 24-26 Oct 2017; Available from http://dx.doi.org/10.1088/1742-6596/1038/1/012071; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
Journal
Journal of Physics. Conference Series (Online); ISSN 1742-6596;
; v. 1038(1); [7 p.]

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Alpatov, V.G.; Davydov, A.V.; Kartashov, G.R.
Programme and abstracts of the 5. International conference on nuclear spectroscopic investigations of hyperfine interactions (NSI-HFI-5)1993
Programme and abstracts of the 5. International conference on nuclear spectroscopic investigations of hyperfine interactions (NSI-HFI-5)1993
AbstractAbstract
[en] Short communication
Original Title
Poisk rezonansnogo pogloshcheniya gamma-kvantov 109Ag v monokristalle serebra
Source
Godovikov, S.K.; Parfenova, V.P. (eds.); Joint Inst. for Nuclear Research, Dubna (Russian Federation); AN SSSR, Moscow (Russian Federation). Fizicheskij Inst.; Moskovskij Gosudarstvennyj Univ., Moscow (Russian Federation); Moskovskij Gosudarstvennyj Univ., Moscow (Russian Federation). Nauchno-Issledovatel'skij Inst. Yadernoj Fiziki; 185 p; 1993; p. 39; 5. International conference on nuclear spectroscopic investigations of hyperfine interactions (NSI-HFI-5); 5. Mezhdunarodnoe soveshchanie po yaderno-spektroskopicheskim issledovaniyam sverkhtonkikh vzaimodejstvij; Dubna (Russian Federation); 22-24 Sep 1993
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Miscellaneous
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AbstractAbstract
No abstract available
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Spring meeting of the Swiss Physical Society; Fribourg (Switzerland); 24-25 Mar 1983; Published in summary form only.
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Journal Article
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Conference
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Helvetica Physica Acta; ISSN 0018-0238;
; v. 56(4); p. 973

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AbstractAbstract
[en] Mechanical resonances in superconducting accelerator structures and cryo-module components can lead to coupling between mechanical noise and electron beam parameters. The authors have studied the mechanical resonance spectrum of a 500 MHz-2-cell structure and cryo-module that was designed and built by Siemens for TRW, Inc., and have measured the effect of these vibrational modes on the RF eigenfrequency of the structure. They identify the most dangerous resonances of this system and discuss related design issues
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Institute of Electrical and Electronics Engineers, Inc., New York, NY (United States); American Physical Society, Washington, DC (United States); 956 p; 1993; p. 950-952; PAC '93: international particle accelerator conference; Washington, DC (United States); 17-20 May 1993; Available from IEEE Service Center, 445 Hoes Lane, Piscataway, NJ 08854-4150
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Report
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Conference
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Quibilan, E.I.
Seminar on developmental directions in atomic energy: engineering and industry, Diliman, Quezon City, 6 Dec 1979
Seminar on developmental directions in atomic energy: engineering and industry, Diliman, Quezon City, 6 Dec 1979
AbstractAbstract
[en] The basis for the phenomenon of nuclear magnetic resonance (NMR) is the ability of certain nuclei possessing both intrinsic angular momentum or ''spin'' I and magnetic moment to absorb electromagnetic energy in the radio frequency range. In principle, there are approximately 200 nuclei which may be investigated using the NMR technique. The NMR spectrum consists of intensity peaks along an axis calibrated in terms of the steady magnetic field or the frequency of the radiofrequency electromagnetic radiation. Analysis of the number, spacing, position and intensity of the lines in an NMR spectrum consists of intensity peaks along an axis calibrated in terms of the steady magnetic field or the frequency of the radiofrequency electromagnetic radiation. Analysis of the number, spacing, position and intensity of the lines in an NMR spectrum provides a variety of qualitative and quantitative analytical applications. The most obvious applications consist of the measurements of nuclear properties, such as spin number and nuclear magnetic moment. In liquids, the fine structure of resonance spectra provides a tool for chemical identification and molecular structure analysis. Other applications include the measurements of self-diffusion coefficients, magnetic fields and field homogeneity, inter-nuclear distances, and, in some cases, the water content of biological materials. (author)
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Source
Philippine Atomic Energy Commission, Diliman, Quezon City; p. 1-9; nd; p. 1-9; Seminar on developmental directions in atomic energy: engineering and industry; Diliman, Quezon City, Philippines; 6 Dec 1979; 17 refs.
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Miscellaneous
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AbstractAbstract
[en] The physics of Alfven-wave heating is particularly sensitive to the character of the linear mode conversion which occurs at the Alfven resonance layer. Parameter changes can profoundly affect both the location within the plasma and the mechanism for the power absorption. Under optimal conditions the heating power may be absorbed by electron Landau damping and by electron transit-time magnetic pumping in the plasma interior, or by the same processes acting near the resonance layer on the mode-converted kinetic Alfven wave. The method is outlined for computing the coefficients for reflection, transmission and absorption at the resonance layer and some representative results are offered
Primary Subject
Source
Canobbio, E. (Association EURATOM-CEA, Grenoble (France)); Eubank, H.P. (Princeton University, NJ (USA)); Leotta, G.G.; Malein, A. (Commission of the European Communities, Brussels (Belgium)); Sindoni, E. (Universita di Milano (Italy)) (eds.); Commission of the European Communities, Brussels (Belgium); 590 p; 1981; p. 631-639; 2. Joint Grenoble-Varenna international symposium on heating in toroidal plasmas; Como, Italy; 3 - 12 Sep 1980
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