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.