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Radiative-electron-capture-to-continuum cusp in U88+ + N2 collisions and the high-energy endpoint of electron-nucleus bremsstrahlung

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Atanasov,  Dinko
GSI Helmholtzzentrum für Schwerionenforschung;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Ruprecht-Karls Universität Heidelberg;

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Litvinov,  Yuri A.
GSI Helmholtzzentrum für Schwerionenforschung;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Ruprecht-Karls Universität Heidelberg;

Yan,  X.L.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Institute of Modern Physics, Chinese Academy of Sciences;
University of Chinese Academy of Sciences;

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Citation

Hillenbrand, P.-M., Hagmann, S., Atanasov, D., Banas, D., Blumenhagen, K.-H., Brandau, C., et al. (2014). Radiative-electron-capture-to-continuum cusp in U88+ + N2 collisions and the high-energy endpoint of electron-nucleus bremsstrahlung. Physical Review A, 90(2): 022707. doi:10.1103/PhysRevA.90.022707.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0023-D968-F
Abstract
The radiative electron capture of a target electron into the projectile continuum has been studied for the collision system U88+ + N2 → U88++[N+2] + e + γ at 90 MeV/u. Using a magnetic electron spectrometer, the energy distribution of cusp electrons emitted under an angle of 0 with respect to the projectile beam and with a velocity close to the projectile velocity has been measured in coincidence with the emitted photons under various observation angles. The experimental results provide a stringent test for the corresponding process in inverse kinematics, namely, the theory of electron-nucleus bremsstrahlung at the high-energy endpoint. For comparison this process is calculated using fully relativistic Dirac wave functions and using semirelativistic Sommerfeld-Maue wave functions.