2000/07/14 by Karin Andersson, Joakim Sandström, Igor Yu. Kiyan +2 · 2 citations
Physics and Astronomy · Chemistry · #Atomic and Molecular Physics #Mass Spectrometry Techniques and Applications #X-ray Spectroscopy and Fluorescence Analysis #Physics #Electron affinity (data page) #Atomic physics #Ionization #Excited state #Electron #Ion #Laser #Resolution (logic) #Potassium #Resonance (particle physics) #Molecule #Optics #Nuclear physics #Chemistry #Quantum mechanics
paper · doi:10.1103/physreva.62.022503
openalex publication_date 2000/07/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A high-resolution measurement of the electron affinity of potassium has been made using the laser photodetachment threshold technique. A sensitive collinear laser--negative-ion beam apparatus was used in the experiment. We investigated the threshold for photodetachment of K^\ensuremath- leading to the formation of residual K atoms in the 4p3/2 state. These excited atoms were selectively detected by use of resonance ionization. The result, an electron affinity of 501.459(12) meV for K, is significantly more accurate than previous measurements and current theory.