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We have measured the lifetime of the 5s5p ^3P_2 metastable state of strontiumatoms by magneto-optically trapping the decayed atoms to the ground state,which allowed sensitive detection of the rare decay events. We found that theblackbody radiation-induced decay was the dominant decay channel for the stateat T = 300 K. The lifetime was determined to be 500^{+280}_{-130} s in thelimit of zero temperature.Comment: 4 pages, 3 figures, submitted to Physical Review Letter

physical review letters

Lifetime Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>P</mml:mi><mml:mn>2</mml:mn><mml:none /><mml:mprescripts /><mml:none /><mml:mn>3</mml:mn></mml:mmultiscripts></mml:math>Metastable State of Strontium Atoms

Lifetime Measurement of theP23Metastable State of Strontium Atoms