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Measurement of the distributions of internuclear separations in 3. 0-MeV H/sub 2//sup +/ and 3. 63-MeV HeH/sup +/ beams

Description: Angular distributions of charged dissociation fragments are measured for 3.0-MeV H/sub 2//sup +/ and 3.63-MeV HeH/sup +/ ions incident on approx. 160 A carbon targets. By using the reflection method for a pure Coulomb potential, there are unfolded from these data the distributions of internuclear separations for each molecular-ion species prior to dissociation. These results are insensitive to ion-source conditions. For H/sub 2//sup +/ this distribution, while approx. 2 times wider than a pure … more
Date: January 1, 1979
Creator: Kanter, E P; Cooney, P J; Gemmell, D S; Vager, Z; Pietsch, W J & Zabransky, B J
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Partner: UNT Libraries Government Documents Department
open access

Transmission of fast molecular ions through thin foils

Description: New results on the transmission of fast molecular ions through thin foils are presented and a mechanism for the transmission process is proposed. The main feature of the postulated mechanism is that a finite fraction of the incident molecular beam does not undergo a strong Coulomb explosion while traversing the foil. Because the emerging fragments are at large internuclear separations, there is an enhanced probability for the formation of bound, long-range, excited electronic states following e… more
Date: January 1, 1979
Creator: Pietsch, W J; Gemmell, D S; Cooney, P J; Kanter, E P; Kurath, D; Ratkowski, A J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Neutral hydrogen from the foil-induced dissociation of /sup 4/HeH/sup +/, /sup 3/HeH/sup +/, and H/sub 2//sup +/. [170 to 1800 keV/amu]

Description: High resolution energy spectra and angular distributions of H/sup 0/ from the dissociation of /sup 4/HeH/sup +/, /sup 3/HeH/sup +/, and H/sub 2//sup +/ in thin carbon foils are presented for incident ion energies ranging from 170 to 1800 keV/amu. For the range of dwell times inside the target foils studied (about 1 to 10 fsec), the dominant mechanism for such dissociation is the Coulomb explosion of the ions inside the target followed by electron capture near the rear surface of the foil. At th… more
Date: January 1, 1979
Creator: Cooney, P J; Gemmell, D S; Kanter, E P; Pietsch, W J & Zabransky, B J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experimental confirmation of the Jahn-Teller distortion of CH/sub 4//sup +/

Description: Measured energy and angular distributions are reported for H/sup +/ and C/sup n+/ (n = 2,3,4) fragments resulting from the collisional dissociation of 200-keV/amu CH/sub m//sup +/ (m = 0 to 4) in thin carbon targets. From the systematic trends of these Coulomb explosion spectra, qualitative information can be obtained on the structures of these species. In particular, the series displays a narrowing of the carbon angular and energy widths as protons are symmetrically added around a central carb… more
Date: January 1, 1979
Creator: Gemmell, D S; Kanter, E P & Pietsch, W J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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