Rene C. Bilodeau

Infrared laser photodetachment of transition metal negative ions: studies on , , and

Photodetachment threshold spectroscopy on the negative ions of chromium, molybdenum, copper and silver has yielded values for the electron affinities of 5451.0(10), 6027(2), 9967.2(3) and , respectively. The results agree well with previous measurements, with an improvement in the accuracy of up to a factor of 300.

Observation of the magnetic-dipole fine-structure transition in the tellurium negative ion

Two-colour two-photon detachment of via the magnetic dipole transition has yielded an accurate value for the fine-structure splitting of the ion: (0.620586(13) eV). The work clearly demonstrates the applicability of forbidden transitions in the study of the structure of negative ions. One-photon detachment from the level also provided a threshold value which, in combination with the well known binding energy, served as an independent measurement of the fine-structure splitting.