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  • 1
    Electronic Resource
    Electronic Resource
    Photoinduced charge-transfer dissociation in van der Waals complexes. V. Na(centered ellipsis)XCH3 (X=F, Cl, and Br) (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 3988-4001 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: van der Waals complexes Na(centered ellipsis)XCH3 (X=F, Cl, and Br) have been generated by crossing a beam of sodium with the expansion region of a supersonic jet of the appropriate halide, seeded with a rare gas. The identity of these complexes was determined by photoionization time-of-flight mass spectrometry. The primary route for photodepletion of these complexes is thought to be the excitation of the Na chromophore followed by a charge-transfer dissociation: Na(centered ellipsis)XCH3+hν→[Na*(centered ellipsis)XCH3]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.473511
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  • 2
    Electronic Resource
    Electronic Resource
    Fragmentation of fullerenes in collisions with atomic and molecular targets (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 1900-1911 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Fragmentation cross sections of fullerene cations have been measured as a function of collision energy under single collision conditions. The ions are produced by laser desorption from a C60/C70 substrate. Collision products are analyzed with a linear time of flight mass spectrometer. The collision energy ranges from 5 eV up to more than 150 eV in the center of mass reference frame. A combination of molecular dynamics calculations and statistical RRKM theory has been applied to help understand the nature of the fragmentation dynamics. The results of collisions using different fullerenes as projectiles (C+56, C+58, C+60, C+70) as well as collisions with a range of target gases (Ne, Ar, O2, CO2, (CH2)3, C3H6, SF6) give additional insight into the fragmentation mechanisms. The energy dependence of the fragmentation cross sections can be used to identify exothermic reactions between projectile and target as is shown for the case of molecular oxygen. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470946
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  • 3
    Electronic Resource
    Electronic Resource
    Fragmentation, charge transfer and chemical reactions in C60+/C70+–SF6 collisions (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 9390-9397 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Collisions of C60+ and C70+ with SF6 were investigated in a time of flight mass spectrometer and compared with the results of collisions with Ar and Xe. Reaction cross sections were determined as a function of the center of mass collision energy between 25 and 300 eV. The influence of thermal excitation on fragmentation was examined. The effects of additional vibrational degrees of freedom in the case of SF6 on the fragmentation cross sections are discussed. Charge transfer reactions producing C602+ or C702+ were observed only with SF6. Thermal electron emission from highly excited C60− was used for the formation of an intense neutral C60 beam with 1 keV kinetic energy which was used to investigate charge transfer in neutral C60+SF6 collisions. Reaction products CnF+, n=1–11, were found in SF6 collisions. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.476499
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  • 4
    Electronic Resource
    Electronic Resource
    Y-branching of single walled carbon nanotubes (2000)
    Springer
    Applied physics 70 (2000), S. 481-483 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.16.Ch; 81.05.Tp; 81.05.Zx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. Y-branching was observed by scanning tunnelling microscopy (STM) in single wall carbon nanotubes grown by thermal decomposition of C60 fullerene in the presence of transition metals. These novel carbon nanostructures may play an important role in carbon-based nanoelectronics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051072
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  • 5
    Electronic Resource
    Electronic Resource
    Collision energy dependence of He and Ne capture by C 60 + (1992)
    Springer
    The European physical journal 23 (1992), S. 1-2 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. + d ; 34.90. + q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Recently, reports of the formation of endohedral cluster compounds He@C n + and Ne@C n − 4/+ (n even and ≤ 60) have been published for high energy collisions between C 60 + and rare gases [1–4]. Here we present the collision energy dependence for the formation of He@C 60 + and Ne@C 60 + in the region of the energetic threshold for the capture process. The threshold for He capture lies at 6±2 eV in the centre of mass reference frame whereas that for Ne lies somewhat higher at 9±1 eV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436694
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  • 6
    Electronic Resource
    Electronic Resource
    Collision induced fragmentation of mass-selected (CO2) n + clusters (1992)
    Springer
    The European physical journal 22 (1992), S. 521-527 
    Details
    ISSN: 1434-6079
    Keywords: 36.40.+d ; 34.90.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The collisional velocity dependence of the cross sections for fragmentation of mass-selected (CO2) n + (n+2...7) clusters in collisions with Ar atoms is presented. Interesting structure can be observed in the cross sections which indicate that the collision occurs between the Ar atom and one CO2 molecule within the cluster. The results may be explained by assuming that the collision leads to either vibrational excitation of a loosely bound CO2 monomer which then leaves the cluster or excitation of the entire cluster to a dissociative state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01426094
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  • 7
    Electronic Resource
    Electronic Resource
    Collisional dynamics of C60 with noble-gas-atoms studied by molecular dynamics with empirical two- and three-body forces (1993)
    Springer
    The European physical journal 28 (1993), S. 153-161 
    Details
    ISSN: 1434-6079
    Keywords: 36.40.+d ; 34.10.+x
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dynamics of C60-rare gas collisions is studied using molecular dynamics with empirical two- and three-body forces. The carbon potential is chosen to be able to reproduce the experimentally determined bond lengths and cluster radius of C60 as well as the structure of small carbon clusters. The reaction channels observed can be divided into four categories: deep inelastic scattering, fragmentation, capture and inelastic scattering. The temperature dependence of the threshold energy for capture is studied and compared with available experimental data. The calculations predict a maximum in the lowest tail of the kinetic-energy distribution of the projectile with a transition from a single- to a double-humped maximum with increasing collision energy and, in addition, may provide a natural interpretation for the, as yet unexplained, structure in the experimental shapes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436983
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