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Some Fundamental Aspects Of The Optical Potential For The Interaction Of Fast Neutrons With Cobalt
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Book Synopsis Some Fundamental Aspects of the Optical Potential for the Interaction of Fast Neutrons with Cobalt by :
Download or read book Some Fundamental Aspects of the Optical Potential for the Interaction of Fast Neutrons with Cobalt written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Differential elastic- and inelastic-scattering cross sections, measured from approx. 1.5 to 10.0 MeV, are interpreted in terms of spherical-optical-statistical (OM) and coupled-channels models. A successful description of the differential elastic scattering below 10 MeV and the total cross section to 20.0 MeV is achieved using the spherical OM with energy-dependent strengths and geometries. These energy dependencies are large below approx. 7.0 MeV, but become smaller and similar to those reported for /open quotes/global/close quotes/ potentials at higher energies. This change in the energy dependence of the parameters probably marks the onset of the Fermi surface anomaly approx. 19 MeV above the Fermi energy. Inelastic scattering to the levels below 1.8 MeV displays a forward-peaked behavior. This nonstatistical component is interpreted using the weak-coupling model in which the f--2 proton hole is coupled to the 2/sup /plus// state in 6°Ni. This model provides an explanation of the unusual energy dependence and relatively small radius found for the imaginary OM potential. The coupling also contributes to the large value of this potential. The real spherical OM potential derived from the neutron-scattering results is extrapolated to bound energies by using the dispersion relationship and the method of moments. The resulting real-potential strength and radius peak at approx.-10.0 MeV, whereas the real diffuseness is at a minimum at this energy. The extrapolated potential is approx. 8% larger than that implied by reported particle-state energies, and approx. 13% smaller than indicated by hole-state energies. 42 refs., 8 figs.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Interaction of Fast Neutrons with Oriented 60Co Nuclei by : Dennis Charles Healey
Download or read book The Interaction of Fast Neutrons with Oriented 60Co Nuclei written by Dennis Charles Healey and published by . This book was released on 1970 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Cobalt, Fast Neutrons and Physical Models by :
Download or read book Cobalt, Fast Neutrons and Physical Models written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy-averaged neutron total cross sections of cobalt were measured from approx. =0.5 to 12.0 MeV. Differential elastic- and inelastic-scattering cross sections were measured from approx. =1.5 to 10.0 MeV over the scattering-angle range approx. =18° to 160°, with sufficient detail to define the energy-averaged behavior. Inelastic neutron groups were observed corresponding to ''levels'' at: 1115 +- 29, 1212 +- 24, 1307 +- 24, 1503 +- 33, 1778 +- 40, 2112 +- 40, 2224 +- 35, 2423 +- 39, 2593 +- 41 and 2810 keV. The experimental results were interpreted in terms of the spherical optical-statistical and coupled-channels models. An unusually successful description of observables was achieved over a wide energy range (-15.0 to 20.0 MeV) with a spherical model having energy-dependent strengths and geometries. The energy dependencies are large below approx. =7.0 MeV (i.e., approx. =19.0 MeV above the Fermi energy), but become smaller and similar to those reported for ''global'' potentials at higher energies. The imaginary strength is large and decreases with energy. These imaginary-potential characteristics are attributed to neutron shell closure and collective-vibrational processes. The weak-coupling model also offers an explanation of the unusual negative energy slope and relatively small radius of the imaginary potential. The spherical optical model derived from the neutron-scattering results was extrapolated to bound energies using the dispersion relationship and the method of moments. The resulting real-potential strength and radius peak at approx. =-10.0 MeV, while concurrently the real diffuseness is at a minimum. The extrapolated potential is approx. =8% larger than that implied by reported particle-state energies, and approx. =13% smaller than indicated by hole-state energies. 68 refs., 15 figs., 1 tab.
Book Synopsis Spin-spin dependence of the interaction between fast neutrons a... by : Wabe Heeringa
Download or read book Spin-spin dependence of the interaction between fast neutrons a... written by Wabe Heeringa and published by . This book was released on 19?? with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Advisory Committee on Technology and Society Publisher :National Academies Press ISBN 13 :9780309037860 Total Pages :1298 pages Book Rating :4.0/5 (378 download)
Book Synopsis Cities and Their Vital Systems by : Advisory Committee on Technology and Society
Download or read book Cities and Their Vital Systems written by Advisory Committee on Technology and Society and published by National Academies Press. This book was released on 1989 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cities and Their Vital Systems asks basic questions about the longevity, utility, and nature of urban infrastructures; analyzes how they grow, interact, and change; and asks how, when, and at what cost they should be replaced. Among the topics discussed are problems arising from increasing air travel and airport congestion; the adequacy of water supplies and waste treatment; the impact of new technologies on construction; urban real estate values; and the field of "telematics," the combination of computers and telecommunications that makes money machines and national newspapers possible.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1988 with total page 1590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
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Book Synopsis Government Reports Announcements & Index by :
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Book Synopsis Government-wide Index to Federal Research & Development Reports by :
Download or read book Government-wide Index to Federal Research & Development Reports written by and published by . This book was released on 1966 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. National Bureau of Standards. Technical Information and Publications Division Publisher : ISBN 13 : Total Pages :788 pages Book Rating :4.3/5 (91 download)
Book Synopsis Catalog of National Bureau of Standards Publications, 1966-1976: Key word index by : United States. National Bureau of Standards. Technical Information and Publications Division
Download or read book Catalog of National Bureau of Standards Publications, 1966-1976: Key word index written by United States. National Bureau of Standards. Technical Information and Publications Division and published by . This book was released on 1978 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Bureau of Standards 1977 Catalog by : United States. National Bureau of Standards
Download or read book Publications of the National Bureau of Standards 1977 Catalog written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
