Lifetime measurements for excited states of rare-earth atoms using pulse modulation of a cw dye-laser beam

Radiative Lifetimes of Eu i , ii , and iii and Transition Probabilities of Eu i

“…We see excellent agreement with LIF measurements of Gustavsson et al (1979) and Fechner, Rinkleff, & Steudel (1987) on three long-lived neutral levels. The average and root mean square (rms) differences between our results and theirs are +1.8% and 2.0%, respectively, for Gustavsson et al (1979) and +2.2% and 3.0%, respectively, for Fechner et al (1987). The agreement between our work and LIF results of Meyer et al (1981) for 12 levels of Eu i and ii is not quite as good.…”

“…Air wavelengths are computed from these energies using the standard index of air (Edlén 1953(Edlén , 1966. We see excellent agreement with LIF measurements of Gustavsson et al (1979) and Fechner, Rinkleff, & Steudel (1987) on three long-lived neutral levels. The average and root mean square (rms) differences between our results and theirs are +1.8% and 2.0%, respectively, for Gustavsson et al (1979) and +2.2% and 3.0%, respectively, for Fechner et al (1987).…”

Natural radiative lifetimes in the perturbed 6snd 1 D 2 sequence of barium

“…Standard electronics were used and data was taken out on paper tape for off-line computer analysis. The features of the PUMOLS technique have been discussed at length in [9]. A resistively heated oven containing Ba metal produced the atomic beam of low collimation ratio in a vacuum chamber.…”

“…The lifetimes of the short-lived perturber states 5d7d 3F 2 and 1D 2 were also measured as well as those of some 6snd aD 2 states in the region of strong perturbation. In the present measurements we have used the PUMOLS (PUlse MOdulated Laser Spectroscopy) technique, which incorporates pulse modulation of a CW dye-laser beam and delayed coincidence electronics I- [8][9][10][11]. This technique proved to be much more powerful than that employed in our preliminary measurements.…”

A tunable pulsed Raman spectrometer capable of probing picosecond processes

“…We note that the pulse shape of the signal due to the event has a fwhm of 3.2 ns which happens, in a fortuitous way, to be equal to the width of the light pulses coming from the dye laser system (these pulses are, according to the manufacturer, 20% shorter than the 4 ns pulses of the N, laser). There is a great deal of information available in the literature regarding the detection of fluorescence spectra excited with pulsed lasers (12)(13)(14)(15)(16). They and Raman signals from strongly scattering systems like CCl, etc.…”