Spectroscopy of a narrow-line optical pumping transition in dysprosium

• Published in: arXiv.org 2013-01
• Main Authors: Schmitt, M, Henn, E A L, Billy, J, Kadau, H, Maier, T, Griesmaier, A, Pfau, T
• Format: Article
• Language: English
• Subjects: Atomic beam spectroscopy; Atomic beams; Demagnetization; Dysprosium isotopes; Fluorescence; Optical pumping; Spectrum analysis
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1301.3645

We present measurements of the hyperfine coefficients and isotope shifts of the Dy I \(683.731 \)nm transition, using saturated absorption spectroscopy on an atomic beam. A King Plot is drawn resulting in an updated value for the specific mass shift \(\delta \nu_\mathrm{684,sms}^\mathrm{164-162}=-534 \pm 17 MHz\). Using fluorescence spectroscopy we measure the excited state lifetime \(\tau_{684}=1.68(5) \mu\)s, yielding a linewidth of \(\gamma_\mathrm{684} = 95 \pm 3 kHz\). We give an upper limit to the branching ratio between the two decay channels from the excited state showing that this transition is useable for optical pumping into a dark state and demagnetization cooling.