Radiative lifetimes of some excited levels in Eu II

Abstract

Radiative lifetimes of the six levels 6p3/z(7/2,3/2)2,3,4,5 and 6pl/2(7/2 , 1/2)3,4 in Eu iiare measured with a laser-ion beam technique using intracavity excitation and tandem pumping.

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

“…The other LIF measurements available for these two levels support our results. The average and rms difference between our work and that of Arnesen et al (1983) are +1.0% and 7.5%, respectively. Finally, Zhang et al (2000) reports lifetimes of six Eu ii levels and three levels of Eu iii.…”

“…It is difficult to achieve 1% accuracy of some laser-fast beam measurements with time-resolved LIF due to limits on the bandwidth, linearity, and overall fidelity of fast (subnanosecond) detection electronics. In this case, however, these two lifetimes from the laser-fast beam experiment are given substantially higher uncertainties, and problems associated with the measurements are discussed in the paper (Arnesen et al 1983). The other LIF measurements available for these two levels support our results.…”

“…The average and rms differences between our results and those of Meyer et al (1981) are +1.4% and 8.0%, respectively, for all 12 levels or +0.7% and 3.4%, respectively, omitting the two levels with slight disagreement. A complete discussion of the comparison between our lifetimes and those of Arnesen et al (1983) can be found in Lawler (2001c). Briefly, they have measured lifetimes of the six low-lying even-parity levels of Eu ii using the laser-fast beam method.…”

Improved Laboratory Transition Parameters for Euiiand Application to the Solar Europium Elemental and Isotopic Composition

“…The other two LIF measurements on the level at 27104.07 cm~1 support our result. Arnesen et al (1983) used the fast beam laser technique to study these six levels of Eu II. This technique is capable of yielding lifetime measurements accurate to better than 1%.…”

Radiative properties of Eu II and Eu III obtained from lifetime and branching ratio measurements

“…Meyer et al (1981) have measured the lifetimes of six levels of Eu II in the 4f 7 6p configuration by pulsed dye laser excitation and time-resolved observation of the fluorescence light in a discharge cell. The lifetimes of the same levels were also measured by Arnesen et al (1983) with an intra-cavity excitation beam-laser technique. Using the method of electron impact excitation and delayed-coincidence detection, Penkin et al (1984) measured the lifetimes of the same six levels and of one level of the 4f 6 5d6s configuration of Eu II.…”