Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 46: Atomic collisions and ultracold plasmas

A 46.1: Vortrag

Donnerstag, 20. März 2014, 16:30–16:45, BEBEL E34

Electron spectroscopy at the high-energy endpoint of electron-nucleus bremsstrahlung — •Pierre-Michel Hillenbrand^1,2, Siegbert Hagmann^1,3, Dariusz Banas⁴, Carsten Brandau^5,2, Reinhard Dörner³, Enrico De Filippo⁸, Alexandre Gumberidze⁵, Dalong Guo^9,10, Doris Jakubassa-Amundsen¹¹, Michael Lestinsky¹, Yuri Litvinov^1,12, Alfred Müller², Hermann Rothard¹³, Stefan Schippers², Uwe Spillmann¹, Andrey Surzhykov⁶, Sergey Trotsenko^1,6, Alexander Voitkiv¹⁴, Vladimir Yerokhin¹⁵, and Thomas Stöhlker^1,6,7 — ¹GSI Darmstadt — ²Univ. Giessen — ³Univ. Frankfurt — ⁴Univ. Kielce, Poland — ⁵Extreme Matter Institute Darmstadt — ⁶Helmholtz-Institut Jena — ⁷Univ. Jena — ⁸INFN Catania, Italy — ⁹IMP Lanzhou, China — ¹⁰Univ. Beijing, China — ¹¹Univ. München — ¹²Univ. Heidelberg — ¹³CIRIL GANIL Caen, France — ¹⁴MPI-K Heidelberg — ¹⁵Petersburg State Univ., Russia

The high-energy endpoint of electron-nucleus bremsstrahlung has been studied in inverse kinematics: For collisions U⁸⁸⁺+N₂→U⁸⁸⁺+[N₂⁺]^* + e⁻ + γ the energy distribution of electrons scattered under ϑ_e^lab=0^∘ with v_e≈ v_proj was measured coincident with the bremsstrahlung photons emitted under various angles ϑ_γ^lab. The triple-differential cross sections provide a stringent test for the fully relativistic theory of electron-nucleus bremsstrahlung. Furthermore the studied process, also termed radiative electron capture to continuum RECC, was compared to the competing processes of non-radiative electron capture to continuum ECC and the electron loss to continuum ELC.