A study of the spectrum of natural dysprosium with the laser-atomic-beam technique. I. Isotope shifts

Spectroscopy of a narrow-line optical pumping transition in atomic dysprosium

“…From a linear fit of the King plot, we extract its slope, equal to the ratio between electronic field shift factors E 684 ∕E 457 −1.601 0.003 and the intersection −231.1 1.8 MHz, which allows us to calculate the SMS for the 684 nm transition. For the two most abundant bosons, the SMS for the 457 nm transition was measured to be δν 164−162 457;sms 7 8 MHz [17], and we therefore find the corresponding SMS for the 684 nm transition to be δν 164−162 684;sms −534 17 MHz. Both the negative field shift factor ratio and the large negative value of the SMS for the 684 nm transition show the different nature of this transition compared to the reference transition.…”

“…3, giving the isotope shifts of the considered transition as a function of the isotope shifts of a known reference transition, both normalized to the atomic number difference ΔN. We choose, as reference, the transition 4f 10 6s 2 → 4f 10 6s6p at 457 nm [17], which has a pure "sp" excited state.…”

Measurement of hyperfine structure and isotope shifts in the Dy 421 nm transition

“…From the slope of the King Plot line (Fig. 3), the ratio of electronic field-shift parameters E 421 /E 457 = 0.920(6) was obtained, indicating a close agreement with a configu- [15] normalized to the difference in nucleon number. The solid line is a leastsquares linear fit weighted by uncertainties in the x-and ydirections.…”

“…2 → 6s6p transition [15]. A King-Plot analysis [17] was performed using these two transitions to evaluate the specific mass shift of the 421-nm transition and the ratio of field-shift parameters.…”

“…) is 30 MHz [15,19] for the 421-nm transition. This is in contrast to transitions where the f -shell is rearranged.…”