Phys. Rev. A 69, 032503 (2004) [9 pages]Lifetime measurement of the metastable 3d 2D5∕2 state in the 40Ca+ ion using the shelving technique on a few-ion stringReceived 20 November 2003; published 16 March 2004 We present a measurement of the lifetime of the metastable 3d 2D5∕2 state in the 40Ca+ ion, using the so-called shelving technique on a string of five Doppler laser-cooled ions in a linear Paul trap. A detailed account of the data analysis is given, and systematic effects due to unwanted excitation processes and collisions with background gas atoms are discussed and estimated. From a total of 6805 shelving events, we obtain a lifetime τ=1149±14(stat.)±4(sys.)ms, a result which is in agreement with the most recent measurements. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.69.032503
DOI:
10.1103/PhysRevA.69.032503
PACS:
32.70.Cs, 95.30.Ky, 42.50.Lc, 32.80.Pj
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