Optics and Spectroscopy

Constants of quenching of 5s 22 D 5/2, 3/2 CdII levels by argon

A. I. Mis’kevich, Xiaolin Zhao

Published Apr 1, 2002• 1 citation

Abstract

Constants of quenching of the CdII ion Beutler levels by argon were experimentally determined. Excited cadmium ions in the 5s 2 2 D 5/2, 3/2 states were produced by sputtering metal cadmium with alpha-particles at a temperature of 240°C. The quenching constants for the 5s 2 2 D 5/2 and 5s 2 2 D 3/2 CdII ion levels were found to be 1.3×10−10 and 1.8×10−10 cm3 s−1, respectively.

DOI: 10.1134/1.1473586

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Optics and Spectroscopy

Constants of quenching of 5s 22 D 5/2, 3/2 CdII levels by argon

A. I. Mis’kevich, Xiaolin Zhao

Published Apr 1, 2002• 1 citation

Publisher

Abstract

DOI: 10.1134/1.1473586

Related papers

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A. V. Karelin

Quantum ElectronicsApr 30, 20031 citation

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N. P. Penkin, T. P. Reďko

OptSpDec 1, 19840 citations

Alignment of Cd atoms by photoionization

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Collisional quenching and j -mixing rate constants for the 3D levels of Ca+

Martina Knoop, M. Vedel, F. Vedel

Collisional relaxation and fine-structure mixing rate constants have been measured for the metastable $D$ doublet ${(3D}_{3/2},$ ${3D}_{5/2})$ of ${\mathrm{Ca}}^{+}$ ions in the presence of different neutral gases completing a previous work. Experimental results are given for He, Ne, Ar, ${\mathrm{H}}_{2},$ ${\mathrm{N}}_{2},$ and ${\mathrm{CH}}_{4}.$ These data have been obtained with a cloud of approximately ${10}^{5}$ ${\mathrm{Ca}}^{+}$ ions stored in a Paul trap at kinetic energies of around 1 eV. The investigated levels were populated by direct excitation of the corresponding $4S\ensuremath{-}3D$ transitions. The involved time constants were determined from the temporal evolution of the fluorescence of one of the resonance transitions, following the optical pumping of the $P$ level from the $D$ component. Comparison of our data with other similar experimental and theoretical work is finally presented.Collisional relaxation and fine-structure mixing rate constants have been measured for the metastable $D$ doublet ${(3D}_{3/2},$ ${3D}_{5/2})$ of ${\mathrm{Ca}}^{+}$ ions in the presence of different neutral gases completing a previous work. Experimental results are given for He, Ne, Ar, ${\mathrm{H}}_{2},$ ${\mathrm{N}}_{2},$ and ${\mathrm{CH}}_{4}.$ These data have been obtained with a cloud of approximately ${10}^{5}$ ${\mathrm{Ca}}^{+}$ ions stored in a Paul trap at kinetic energies of around 1 eV. The investigated levels were populated by direct excitation of the corresponding $4S\ensuremath{-}3D$ transitions. The involved time constants were determined from the temporal evolution of the fluorescence of one of the resonance transitions, following the optical pumping of the $P$ level from the $D$ component. Comparison of our data with other similar experimental and theoretical work is finally presented.

Physical Review AJul 1, 199820 citations

The

^{2}D_{\frac{3}{2}}

and

^{2}D_{\frac{5}{2}}

excited states of the cadmium ion are produced through photoionization of cadmium atoms by a beam of Hei 584-\AA{} radiation. The presence of alignment in the ions is detected by measuring the degree of linear polarization

P

of the resulting emission. It is found that $P(^{2}D_{\frac{5}{2}}\ensuremath{\rightarrow}^{2}P_{\frac{3}{2}})=\ensuremath{-}0.052\ifmmode\pm\else\textpm\fi{}0.005$ for the 4416-\AA{} transition, and $P(^{2}D_{\frac{3}{2}}\ensuremath{\rightarrow}^{2}P_{\frac{3}{2}})=+0.12\ifmmode\pm\else\textpm\fi{}0.04$ for the 3536-\AA{} transition, demonstrating that both

^{2}D

fine-structure components are aligned. A simple calculation is presented which ignores anisotropic final-state interactions. This calculation correctly predicts the sign of the degree of polarization, but fails to reproduce the experimental results.

Collisional relaxation and fine-structure mixing rate constants have been measured for the metastable

D

doublet

{(3D}_{3/2},

{3D}_{5/2})

{\mathrm{Ca}}^{+}

ions in the presence of different neutral gases completing a previous work. Experimental results are given for He, Ne, Ar,

{\mathrm{H}}_{2},

{\mathrm{N}}_{2},

and

{\mathrm{CH}}_{4}.

These data have been obtained with a cloud of approximately

{10}^{5}

{\mathrm{Ca}}^{+}

ions stored in a Paul trap at kinetic energies of around 1 eV. The investigated levels were populated by direct excitation of the corresponding $4S\ensuremath{-}3D$ transitions. The involved time constants were determined from the temporal evolution of the fluorescence of one of the resonance transitions, following the optical pumping of the

P

level from the

D

component. Comparison of our data with other similar experimental and theoretical work is finally presented.