Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Postersession

HK 45.1: Poster

Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24

Coincidence studies of bremsstrahlung during electron-nucleus collisions — •Doris Jakubassa-Amundsen — LMU Muenchen, Germany

A precise knowledge of electron-nucleus bremsstrahlung is important for estimating its influence in the electron spectra from nuclear excitation. A photon recorded simultaneously with the inelastically scattered electron may thus result from elementary bremsstrahlung induced by an inert nucleus, in particular at angles where the probability for radiative decay into the nuclear ground state is small. In order to obtain reliable estimates for heavy nuclei the relativistic partial-wave bremsstrahlung code has been optimized to cover collision energies up to 30 MeV. For spin-polarized electrons the polarization transfer to the photon is also considered. For 208Pb nuclear size effects are found to be quite large at backward angles, exceeding 10 percent even at a collision energy of 5 MeV. Although such effects are included in the conventionally used Born approximation, the PWBA gives at most a qualitative prescription for bremsstrahlung intensities and polarization correlations when heavy nuclei are involved.