2020/03/20 by Rulin Tang, Xiaoxi Fu, Yuzhu Lu +1 · 4 citations
Physics and Astronomy · Materials Science · Chemistry · #Advanced Chemical Physics Studies #Electron and X-Ray Spectroscopy Techniques #X-ray Spectroscopy and Fluorescence Analysis #Isotropy #Gallium #Electron #Spectral line #Electron affinity (data page) #Atomic physics #X-ray photoelectron spectroscopy #Perpendicular #Ion #Resolution (logic) #Ground state #Chemistry #Nuclear magnetic resonance #Physics #Optics #Molecule #Nuclear physics #Geometry
paper · doi:10.1063/1.5144962
openalex publication_date 2020/03/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/12
We report the high-resolution photoelectron spectra of negative gallium anions obtained via the slow-electron velocity-map imaging method. The electron affinity of Ga is determined to be 2429.07(12) cm−1 or 0.301 166(14) eV. The fine structures of Ga are well resolved: 187.31(22) cm−1 or 23.223(27) meV for 3P1 and 502.70(28) cm−1 or 62.327(35) meV for 3P2 above the ground state 3P0, respectively. The photoelectron angular distribution for photodetachment from Ga−(4s24p2 3P0) to Ga(4s25s 2S1/2) is measured. An unexpected perpendicular distribution instead of an isotropic distribution is observed, which is due to a resonance near 3.3780 eV.