@article{Singer_2005,
	doi = {10.1088/0953-4075/38/2/023},
	url = {https://doi.org/10.1088/0953-4075/38/2/023},
	year = 2005,
	month = {jan},
	publisher = {{IOP} Publishing},
	volume = {38},
	number = {2},
	pages = {S321--S332},
	author = {Kilian Singer and Markus Reetz-Lamour and Thomas Amthor and Simon Fölling and Michaela Tscherneck and Matthias Weidemüller},
	title = {Spectroscopy of an ultracold Rydberg gas and signatures of Rydberg{\textendash}Rydberg interactions},
	journal = {Journal of Physics B: Atomic, Molecular and Optical Physics},
	abstract = {We report on experiments on Rydberg–Rydberg interaction-induced effects in a gas of 87Rb Rydberg atoms. A compact setup for two-photon continuous-wave excitation of high-lying Rydberg states out of an ultracold atomic gas is presented. The performance of the apparatus is characterized by high-resolution spectroscopy of Rydberg states. Signatures of interaction-induced effects are identified by qualitatively analysing the dependence of Rydberg excitation spectra on the intensity and the duration of the second-step laser excitation.}
}