EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh, Scotland.
Phys Rev Lett. 2012 Apr 27;108(17):173401. doi: 10.1103/PhysRevLett.108.173401. Epub 2012 Apr 24.
Photoelectron angular distributions from both C(60) and C(70) were recorded for low laser intensity femtosecond and picosecond pulses. Rich structure is seen for electron kinetic energies that lie below the photon energy. Strong, broad peaks are observed for photoelectron energies corresponding to single-photon ionization of so-called superatom molecular orbitals (SAMOs). The very simple angular distributions measured for these peaks, the close similarity of the spectra observed from C(60) and C(70), and the comparison with time-dependent density functional theory provide strong support for the SAMO hypothesis.
我们记录了低激光强度飞秒和皮秒脉冲下 C(60) 和 C(70) 的光电子角分布。在低于光子能量的电子动能下，我们观察到了丰富的结构。对于对应于所谓的超原子分子轨道 (SAMO) 单光子电离的光电子能量，我们观察到了强烈、宽阔的峰。这些峰的测量非常简单的角分布、从 C(60) 和 C(70) 观察到的光谱的紧密相似性，以及与时间相关的密度泛函理论的比较，为 SAMO 假设提供了强有力的支持。
