Perry-Sassmannshausen A, Buhr T, Borovik A, Martins M, Reinwardt S, Ricz S, Stock S O, Trinter F, Müller A, Fritzsche S, Schippers S
I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Gießen, Germany.
Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
Phys Rev Lett. 2020 Feb 28;124(8):083203. doi: 10.1103/PhysRevLett.124.083203.
We report on new measurements of m-fold photodetachment (m=2-5) of carbon anions via K-shell excitation and ionization. The experiments were carried out employing the photon-ion merged-beams technique at a synchrotron light source. While previous measurements were restricted to double detachment (m=2) and to just the lowest-energy K-shell resonance at about 282 eV, our absolute experimental m-fold detachment cross sections at photon energies of up to 1000 eV exhibit a wealth of new thresholds and resonances. We tentatively identify these features with the aid of detailed atomic-structure calculations. In particular, we find unambiguous evidence for fivefold detachment via double K-hole production.
我们报告了通过K壳层激发和电离对碳负离子进行m重光剥离（m = 2 - 5）的新测量结果。实验是在同步辐射光源处采用光子 - 离子合并束技术进行的。先前的测量仅限于双剥离（m = 2）以及仅约282 eV的最低能量K壳层共振，而我们在高达1000 eV光子能量下的绝对实验m重剥离截面展现出大量新的阈值和共振。我们借助详细的原子结构计算初步识别了这些特征。特别是，我们找到了通过产生双K空穴实现五重剥离的确凿证据。
