Download or read book L Shell Ionisation and X ray Production Cross Section Measurements for Asymmetric Ion atom Collisions written by R. S. Sokhi and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book L shell X ray Production Cross Sections in Nd Gd Ho Yb Au and Pb for 25 MeV Carbon and 32 MeV Oxygen Ions written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: L-shell x-ray production cross sections in 60Nd, 64Gd, 6--Ho, --0Yb, --9Au and 2Pb have been measured for incident 25 MeV 612C/sup +q/(q = 4,5,6) and 32 MeV 16O/sup +q/(q = 5,7,8) ions. Measurements were made on targets ranging in thickness from 1 to 100 ..mu..g/cm2. Echancement in the L-shell x-ray production cross section for projectiles with one or two K-shell vacancies over those for projectiles with no K-shell vacancies is observed. The sum of direct ionization to the continuum (DI) plus electron capture (EC) to the L, M, N ... shells and EC to the K-shell of the projectile have been extracted from the data. Calculations in the first Born approximation are approx. 10 times larger than the data. Predictions of the ECPSSR theory that accounts for the energy-loss, Coulomb deflection, perturbed-stationary state, and relativistic effects are in good agreement with the data for both ions.
Download or read book Characteristic X ray Production by Heavy Ion atom Collisions written by Frans Willem Saris and published by . This book was released on 1971 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book K shell X ray Production Cross Sections of Selected Elements Al to Ni for 4 0 to 38 0 MeV 1 B Ions Cross Sections 4 0 to 38 MeV Binding Energy Electron Capture Decay PWBA Energy Shifts Multiple Ionization written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: K-Shell x-ray production cross sections for the target elements Sc, Ti, V, Mn, Fe, Co, and Ni were measured for incident 1°B ions over the energy range 4.0 to 38.0 MeV. The cross section data were compared to the theoretical predictions of the binary encounter approximation (BEA); the plane wave born approximation (PWBA); and the PWBA modified to include corrections for increased binding energy (B), Coulomb deflection of the incident ion (C), orbital perturbation due to polarization (P), and relativistic effects (R). In addition, fluorescence yield variations (W/sub K/) and contributions to the cross sections from electron capture (EC) were included. It was found that the predictions of the fully modified PWBA with contributions from electron capture and fluorescence yield variations included provided the best fit to the experimental data over the entire energy range for each target element. The K.beta./K.cap alpha. x-ray intensity ratios were compared to theoretical values that assume single hole ionization, and the x-ray energy shifts presented as a function of the energy of the incident ion. These two measurements provided confirmation of the occurrence of multiple ionization for 1°B bombardment of target elements in the range 21 less than or equal to Z2 less than or equal to 28.
Download or read book Ion solid Interactions written by Walter M. Gibson and published by . This book was released on 1980 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic and Atomic Collisions written by J. Geddes and published by North Holland. This book was released on 1988 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic X ray Production by Relativistic Heavy Ions Cross Sections K and L Shells Ionization 3 and 4 88 GEV Holes written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction of heavy ion projectiles with the electrons of target atoms gives rise to the production, in the target, of K-, L- or higher shell vacancies which are in turn followed by the emission of characteristic x-rays. The calculation of the theoretical value of the K- and L-shells vacancy production cross section was carried out for heavy ion projectiles of any energy. The transverse component of the cross section is calculated for the first time in detail and extensive tables of its numerical value as a function of its parameters are also given. Experimental work for 4.88 GeV protons and 3 GeV carbon ions is described. The K vacancy cross section has been measured for a variety of targets from Ti to U. The agreement between the theoretical predictions and experimental results for the 4.88 GeV protons is rather satisfactory. For the 3 GeV carbon ions, however, it is observed that the deviation of the theoretical and experimental values of the K vacancy production becomes larger with the heavier target element. Consequently, the simple scaling law of Z12 for the cross section of the heavy ion with atomic number Z1 to the proton cross section is not true, for the K-shell at least. A dependence on the atomic number Z2 of the target of the form (Z1 - cap alpha. Z2)2, instead of Z12, is found to give extremely good agreement between theory and experiment. Although the exact physical meaning of such dependence is not yet clearly understood, it is believed to be indicative of some sort of screening effect of the incoming fast projectile by the fast moving in Bohr orbits K-shell electrons of the target. The enhancement of the K-shell ionization cross section by relativistic heavy ions on heavy targets is also discussed in terms of its practical applications in various branches of science and technology.
Download or read book Physics Briefs written by and published by . This book was released on 1987 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atomic and Molecular Collision Cross Sections of Interest in Controlled Thermonuclear Research written by C. F. Barnett and published by . This book was released on 1961 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1982 with total page 1744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cross Sections of X ray Production by Alpha Particle Bombardment in the 1 0 to 5 0 MeV Range written by Raymond Robert Karlowicz and published by . This book was released on 1974 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Updated Excitation and Ionization Cross Sections for Electron Impact on Atomic Oxygen written by Russ R. Laher and published by . This book was released on 1988 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference Papers Index written by and published by . This book was released on 1983 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monthly. Papers presented at recent meeting held all over the world by scientific, technical, engineering and medical groups. Sources are meeting programs and abstract publications, as well as questionnaires. Arranged under 17 subject sections, 7 of direct interest to the life scientist. Full programs of meetings listed under sections. Entry gives citation number, paper title, name, mailing address, and any ordering number assigned. Quarterly and annual indexes to subjects, authors, and programs (not available in monthly issues).
Download or read book Measurement of X Ray Cross Sections Relevant to a Scanning Ion Microscope written by Robert K. Cacak and published by . This book was released on 1973 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the study is to determine the feasibility of using X rays generated by heavy ion-atom collisions as the monitoring signal in an ion microscope. Experimental progress in the design, construction, and operation of an experimental apparatus to measure the rate of X-ray production by heavy ions is described. Particular attention is paid to a new type of soft X-ray spectrometer. Preliminary X-ray cross sections obtained with the described apparatus are presented for 1.0 to 2.5 MeV ions incident upon a thin carbon target. The cross sections are found to increase with ion velocity in the range studied. (Modified author abstract).
Download or read book Ion solid Interactions Author title index written by Walter M. Gibson and published by . This book was released on 1980 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Differential Cross Sections for K shell Ionisation and Capture in Asymmetric Collisions written by Erik Horsdal Pedersen and published by . This book was released on 1982 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book X Ray Radiation of Highly Charged Ions written by Heinrich F. Beyer and published by Springer Science & Business Media. This book was released on 1997-08-14 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title is a comprehensive collection of atomic characteristics of highly charged ion sources and elementary processes related to X-ray radiation: energy levels, wavelengths, transition probabilities, cross sections and rate coefficients. Many figures, tables, simple formulas and scaling laws accompany the text wherever possible.
