Energy Research Abstracts
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Published: 1979
Total Pages: 360
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author:
Publisher:
Published: 1979
Total Pages: 360
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1979
Total Pages:
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DOWNLOAD EBOOKReduced ionization cross sections Q/sub R//sup H/(nl, u) were obtained for the nl = 3p and 3d sublevels, as well as for more energy points for the lower sublevels considered in our earlier work. Thus, results are now available for the eight impact electron energies in threshold units u = 1.125, 1.25, 1.5, 2.25, 3.0, 4.0, 5.0, and 6.0 for each of the sublevels 1s, 2s, 2p, 3s, 3p, and 3d. From these results for Q/sub R//sup H/(nl, u) one can readily obtain the cross section for ionization from any of these sublevels in any highly charged complex ion using the simple procedures given in our earlier work. The theory and computer programs developed in our previous work on excitation were used to calculate intermediate coupling collision strengths for all fine structure transitions from the 2P levels to the nP and nD levels with 3 less than or equal to n less than or equal to 5 in He-like ions. Similar calculations have also been made for inner shell excitation of Li-like ions with nuclear charge number Z in the range 10 less than or equal to Z less than or equal to 74. The theory and programs were also extended to treat .delta.n = 0 transitions and were used to obtain intermediate coupling collision strengths for all .delta.n = 0 fine structure transitions with n = 2 in 10 He-like ions with Z in the range 6 less than or equal to Z less than or equal to 74 and 10 Be-like ions with Z in the range 14 less than or equal to Z less than or equal to 74. For excitation the results appear to be accurate to within approx. 30% for 3N less than or equal to Z less than or equal to 74, where N is the number of bound electrons per ion, and more accurate for most of this range. For ionization the results appear to be accurate down to Z/N approx. = 2. 21 references.
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Published: 1980-05
Total Pages: 1012
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Published: 1990
Total Pages: 8
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DOWNLOAD EBOOKThe principle task given us by the Lawrence Livermore National Laboratory (LLNL) to perform under Subcontract 6181405 was to develop a method and corresponding computer programs to make very rapid, yet accurate, fully relativistic and quasirelativistic calculations of cross sections or collision strengths for electron impact excitation of highly charged ions with any value for the nuclear charge number Z. Also while this major code development was being done we were asked to calculate cross sections of interest using our previous rapid, more approximate codes, which used hydrogenic basis functions and screening constants with both the electron-electron Coulomb interaction and relativistic interactions included by perturbation theory. We were also asked to determine the branching ratio for ionization to various final states in complex cases, where two or more states corresponding to the final configuration of the ion were possible.
Author: Philip A. Baedecker
Publisher:
Published: 1987
Total Pages: 192
ISBN-13:
DOWNLOAD EBOOKAnalytical methods used in the Geologic Division laboratories of the U.S. Geological Survey for the inorganic chemical analysis of rock and mineral samples.
Author: Raymond E. March
Publisher: Wiley-Interscience
Published: 2005-09-12
Total Pages: 416
ISBN-13: 9780471717980
DOWNLOAD EBOOKA definitive reference, completely updated Published in 1989, the First Edition of this book, originally entitled Quadrupole Storage Mass Spectrometry, quickly became the definitive reference in analytical laboratories worldwide. Revised to reflect scientific and technological advances and new applications in the field, the Second Edition includes new chapters covering: * New ion trap instruments of high sensitivity * Peptide analysis by liquid chromatography/ion trap tandem mass spectrometry * Analytical aspects of ion trap mass spectrometry combined with gas chromatography * Simulation of ion trajectories in the ion trap One additional chapter discusses the Rosetta mission, a "comet chaser" that was sent on a ten-year journey in 2004 to study the comet Churyumov-Gerasimenko using, among other instruments, a GC/MS system incorporating a specially designed ion trap mass spectrometer. This comprehensive reference also includes discussions of the history of the quadrupole ion trap, the theory of quadrupole mass spectrometry, the dynamics of ion-trapping chemistry in the quadrupole ion trap, the cylindrical ion trap, miniature traps, and linear ion traps. Complete with conclusions and references, this primer effectively encapsulates the body of knowledge on quadrupole ion trap mass spectrometry. With its concise descriptions of the theory of ion motion and the principles of operation, Quadrupole Ion Trap Mass Spectrometry, Second Edition is ideal for new users of quadrupole devices, as well as for scientists, researchers, and graduate and post-doctoral students working in analytical laboratories.
Author: Abderrahmane Beroual
Publisher: IOP Publishing Limited
Published: 2016
Total Pages: 0
ISBN-13: 9780750312370
DOWNLOAD EBOOK'Discharge in Long Air Gaps' presents self-consistent predictive dynamic models of positive and negative discharges in long air gaps. Equivalent models are also derived to predict lightning parameters based on the similarities between long air gap discharges and lightning flashes. Comparisons between computed and experimental results for various test configurations are presented and discussed.
Author: Allan S. Krass
Publisher: Routledge
Published: 2020-11-20
Total Pages: 325
ISBN-13: 100020054X
DOWNLOAD EBOOKOriginally published in 1983, this book presents both the technical and political information necessary to evaluate the emerging threat to world security posed by recent advances in uranium enrichment technology. Uranium enrichment has played a relatively quiet but important role in the history of efforts by a number of nations to acquire nuclear weapons and by a number of others to prevent the proliferation of nuclear weapons. For many years the uranium enrichment industry was dominated by a single method, gaseous diffusion, which was technically complex, extremely capital-intensive, and highly inefficient in its use of energy. As long as this remained true, only the richest and most technically advanced nations could afford to pursue the enrichment route to weapon acquisition. But during the 1970s this situation changed dramatically. Several new and far more accessible enrichment techniques were developed, stimulated largely by the anticipation of a rapidly growing demand for enrichment services by the world-wide nuclear power industry. This proliferation of new techniques, coupled with the subsequent contraction of the commercial market for enriched uranium, has created a situation in which uranium enrichment technology might well become the most important contributor to further nuclear weapon proliferation. Some of the issues addressed in this book are: A technical analysis of the most important enrichment techniques in a form that is relevant to analysis of proliferation risks; A detailed projection of the world demand for uranium enrichment services; A summary and critique of present institutional non-proliferation arrangements in the world enrichment industry, and An identification of the states most likely to pursue the enrichment route to acquisition of nuclear weapons.