1998/09/01 by M. Scheer, C. A. Brodie, R. C. Bilodeau +1 · 3 citations
Physics and Astronomy · Chemistry · #Advanced Chemical Physics Studies #Atomic and Molecular Physics #Spectroscopy and Laser Applications #Physics #Excited state #Ground state #Atomic physics #Spectral line #Ionic bonding #Ion #Crystallography #Quantum mechanics #Chemistry
paper · doi:10.1103/physreva.58.2051
openalex publication_date 1998/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A tunable infrared laser source is utilized to study the photodetachment threshold spectra of the transition-metal negative ions Co^\ensuremath-, Ni^\ensuremath-, Rh^\ensuremath-, and Pd^\ensuremath-. The binding energies of the respective ionic ground states are found to be 663.3(6), 1157.16(12), 1142.89(20), and 562.14(12) meV. In addition, a 3F4\ensuremath-3F3 fine-structure splitting of 875(15) cm^\ensuremath-1 is measured for Co^\ensuremath-, and the 2D5/2\ensuremath-2D3/2 splitting of Ni^\ensuremath- is determined to be 1485(3) cm^\ensuremath-1. For Pd^\ensuremath-, the electronically excited 4d95s22D5/2 state is found to lie 1127(4) cm^\ensuremath-1 above the 4d105s2S1/2 ionic ground state, i.e., it is bound by 422.4(5) meV. The results agree with previous values obtained from laser photodetached electron spectra, but constitute improvements in accuracy of up to two orders of magnitude.