Search for: [Abstrakt = "We demonstrate photoionization spectroscopy in cold rubidium atoms trapped in a working magneto\-optical trap. Three\-photon ionization with two\-photon resonance proceeds along various channels, with the step\-by\-step 5S–5P–5D transition and with the two\-photon excitation of the 5D or 7S state. The processes are monitored by measuring ion signals which allow sensitive spectroscopy of weak transitions in a cold\-atom sample."]

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