Experimental and theoretical study of the3dD2–level lifetimes ofCa+40

Autor:	Marianna Safronova, Hartmut Häffner, C. Roos, Christoph Becher, C. Russo, A. Kreuter, G.P.T. Lancaster, Ferdinand Schmidt-Kaler, A.B. Mundt, W. Hänsel, Rainer Blatt
Rok vydání:	2005
Předmět:	Physics Ab initio 01 natural sciences Atomic and Molecular Physics and Optics Charged particle 010305 fluids & plasmas 3. Good health Ion Atomic theory Ab initio quantum chemistry methods Excited state Metastability 0103 physical sciences Atomic physics 010306 general physics Excitation
Zdroj:	Physical Review A. 71
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.71.032504
Popis:	We report measurements of the lifetimes of the 3d {sup 2}D{sub 5/2} and 3d {sup 2}D{sub 3/2} metastable states of a single laser-cooled {sup 40}Ca{sup +} ion in a linear Paul trap. We introduce a measurement technique based on high-efficiency quantum state detection after coherent excitation to the D{sub 5/2} state or incoherent shelving in the D{sub 3/2} state, and subsequent free, unperturbed spontaneous decay. The result for the natural lifetime of the D{sub 5/2} state of 1168(9) ms agrees excellently with the most precise published value. The lifetime of the D{sub 3/2} state is measured with a single ion and yields 1176(11) ms which improves the statistical uncertainty of previous results by a factor of four. We compare these experimental lifetimes to high-precision ab initio all order calculations [D{sub 3/2} state: 1196(11) ms; D{sub 5/2} state: 1165(11) ms] and find a very good agreement. These calculations represent an excellent test of high-precision atomic theory and will serve as a benchmark for the study of parity nonconservation in Ba{sup +} which has similar atomic structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::125a1eb324b7ee4b5ef73e20740b37e8 https://doi.org/10.1103/physreva.71.032504 Zobrazit plný text záznamu