Search Results - (Author, Cooperation:J. N. Scheurer)

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  1. 1
    B. Cederwall ; F. G. Moradi ; T. Back ; A. Johnson ; J. Blomqvist ; E. Clement ; G. de France ; R. Wadsworth ; K. Andgren ; K. Lagergren ; A. Dijon ; G. Jaworski ; R. Liotta ; C. Qi ; B. M. Nyako ; J. Nyberg ; M. Palacz ; H. Al-Azri ; A. Algora ; G. de Angelis ; A. Atac ; S. Bhattacharyya ; T. Brock ; J. R. Brown ; P. Davies ; A. Di Nitto ; Z. Dombradi ; A. Gadea ; J. Gal ; B. Hadinia ; F. Johnston-Theasby ; P. Joshi ; K. Juhasz ; R. Julin ; A. Jungclaus ; G. Kalinka ; S. O. Kara ; A. Khaplanov ; J. Kownacki ; G. La Rana ; S. M. Lenzi ; J. Molnar ; R. Moro ; D. R. Napoli ; B. S. Singh ; A. Persson ; F. Recchia ; M. Sandzelius ; J. N. Scheurer ; G. Sletten ; D. Sohler ; P. A. Soderstrom ; M. J. Taylor ; J. Timar ; J. J. Valiente-Dobon ; E. Vardaci ; S. Williams
    Nature Publishing Group (NPG)
    Published 2010
    Staff View
    Publication Date:
    2010-12-24
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    ISSN:
    1434-601X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Projectile and target X-ray cross-sections have been measured in collisions of bare and hydrogenlike Silicon ions with argon atoms. Projectile energies are 125 MeV and 153 MeV, i.e. the intermediate velocity region forK-shell capture. Coincidence measurements between X-ray photons and the scattered Si n+ projectiles with charge statesn-1,n-2 andn-3 have been made. The relative contribution of charge exchange and direct ionization (or excitation) of the targetK-shell has been obtained directly by this new method. DoubleK-shell electron transfer is demonstrated to be very large in the case of fully stripped Si ions. A thorough theoretical analysis of the data is carried out and multiple capture processes are evaluated using an independent electron model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01438357

    Articles: DFG German National Licenses
  3. 3
    Staff View
    ISSN:
    1434-601X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The impact parameter dependence of the ionization of GoldL-subshells has been measured and compared to theoretical values calculated in the SCA framework by Aashamar et al. [17]. Special attention has been paid to large scattering angle measurements and results are obtained for0 lab=30°, 45°, 65°, 90°, 110°, 130°, 153° and 166°. Taking into account the sum ofL α ,L β ,L γ ,L α ,L l lines we conclude firstly that the experimental ionization probabilityP(b) is in good agreement with the theoretical values. Secondly, comparing experimental and theoretical intensity of (L α +L l ) and (L γ +L β ) X-ray lines, we show that ionization ofL II andL III subshells is also fairly well described by the SCA model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01412611

    Articles: DFG German National Licenses
  4. 4
    Staff View
    ISSN:
    1434-6079
    Keywords:
    34.50.H ; 25.70
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The total excitation probability of the 1s σ molecular orbital on the way into the nuclear reaction58Ni+54Fe at 238 MeV has been directly measured. The result found is (3.1±0.6) 10−2. The method is based on the detection at zero degree with respect to the beam direction of the x-rays emitted in the reaction, in coincidence with the gamme rays following the deexcitation of the evaporation residues produced in the nuclear reaction. The difference in the doppler shift of the x-ray energies enables to discriminate between the internal conversion x-rays and the prompt atomic x-rays following the decay of the vacancies made in the approach of the nuclear reaction. The experimental data is compared with numerical evaluations of different mechanisms which can produce a vacancy in theK-shell of the united atom at the end of the collision. The best agreement is found with the value of the direct ionization of the 1sσ MO evaluated in the framework of the Brigg's model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01429069

    Articles: DFG German National Licenses