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in subjects: "Electron Capture"  
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New Low Mass Isotopes of Emanation (Element 86)

Description: Among the spallation products obtained from the 350-Mev proton bombardment of Th{sup 232} they have identified two gaseous alpha-emitters which apparently do not decay into any presently known alpha-decay chains. The half-lives observed for the decay of the alpha-activities are 23 minutes and 2.1 hours. These half-lives may be principally determined by an unknown amount of orbital electron capture. At least one alpha-emitting daughter (about 4 hours half-life) has been observed to grow from a g… more
Date: September 5, 1949
Creator: Ghiorso, A.; Meinke, W. W. & Seaborg, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Alpha-Decay in Isotopes of Atomic Number Less Than 83

Description: Some time ago we started work in an attempt to observe alpha-particle decay in isotopes of atomic number less than 83. In the first experiments, thin targets of gold leaf were bombarded with 190-Mev deuterons in the 184-inch cyclotron. Two alpha-decay periods were observed in these targets; one of 0.7 minutes half-life and another of 4.3 minutes half-life. The alpha-particle energies were 5.7 and 5.2 Mev, respectively. Chemical separations proved that the 4.3-minute period is due to a gold isot… more
Date: September 5, 1949
Creator: Thompson, S. G.; Ghiorso, A.; Radmussen, J. O. & Seaborg, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Autoionization of Be-like ions following double electron capture in C sup 4+ , O sup 6+ and Ne sup 8+ ions

Description: This paper describes electron emission following the autoionization of doubly excited states in Be-like ions. The Be-like Auger states are produced by two electron capture in slow C{sup 4+}, O{sup 6+} and Ne{sup 8+} ions. These measurements were performed by means of high resolution Auger electron spectroscopy on different target gases and at different projectile energies. Line assignments and relative cross sections are given for the investigated doubly excited states and the excitation mechan… more
Date: September 11, 1990
Creator: McDonald, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coincidence Measurements of Electron Capture and Loss in Ion-Atom Collisions

Description: Collisions between fast, fully stripped projectiles and atomic targets predominantly result in target electrons being ejected to the continuum. For fast partially stripped projectiles which bring weakly bound electrons into the collision, projectile ionization can also contribute to the observed electron spectra. At lower impact velocities, electron capture by the projectile ion becomes important and higher order processes, often referred to as transfer ionization, can be a significant source o… more
Date: September 1990
Creator: DuBois, R. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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X-Ray Emission Cross Sections following Charge Exchange by Multiply-Charged Ions of Astrophysical Interest

Description: State selective nl-electron capture cross sections are presented for highly charged ions with Z = 6-10 colliding with atoms and molecules. The energy range investigated was from 1 eV/amu (v = 0.006 a.u.) to 100 keV/amu (v =2.0 a.u.). The energy dependence of the l-level populations is investigated. The K-shell x-ray emission cross sections are determined by using the calculated state-selective electron capture results as input and then applying hydrogenic branching and cascading values for the … more
Date: September 19, 2005
Creator: Otranto, S; Olson, R E & Beiersdorfer, P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron capture from occupied surface states within the band gap of LiF(100)

Description: Measurements of scattered neutral fractions for Na, K, and Cs multicharged ions grazingly incident on Li(100) as function of projectile velocity suggest that near resonant processes are active in the final neutral formation, involving occupied surface states within the band gap of the alkali halide target. Observed scattered negative fractions for incident 0, F. and B projectiles are consistent with such a scenario as well. A model treatment of the projectile charge fraction velocity dependence… more
Date: September 1, 1996
Creator: Yan, Q. & Meyer, F.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Metastable Enhancement of C{sup +} and O{sup +} Capture Reactions. Final Technical Report, June 1987--September 1990

Description: Single electron capture by 10- to 500-eV singly charged C and O ions traversing targets of H{sub 2} and H was studied with emphasis on comparing cross sections for metastable species with those for the ground state. For an H{sub 2} target cross sections are of the order 10{Angstrom} and 20 to 30 times larger than for ground state species. Electron impact ion sources typically produce 5 to 30% of their output in the metastable state. Previous published work has largely ignored (or failed to dete… more
Date: September 1, 1990
Creator: Thomas, E. W. & Moran, T. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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L-shell resonant transfer and excitation for NE-like niobium ions

Description: Projectile excitation and charge transfer (capture) can occur simultaneously in a single encounter with a target atom through the electron-electron interaction between a projectile electron and a weakly bound target electron. This process is referred to as resonant transfer and excitation (RTE). L-shell RTE has been investigated for 230 to 610 MeV Nb/sup 31 +/ (neonlike) ions incident on H/sub 2/. 11 refs., 1 fig. (WRF)
Date: September 1986
Creator: Bernstein, E. M.; Clark, M. W.; Tanis, J. A.; Graham, W. G.; McFarland, R. H.; Mowat, J. R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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