ThuliumV1, Main, Exploration, bibRecord, 001671

Blue laser cooling transitions in Tm I

Identifieur interne : 001671 ( Main/Exploration ); précédent : 001670; suivant : 001672

Blue laser cooling transitions in Tm I

Auteurs : N. Kolacheysky [Russie] ; A. Akimov [Russie] ; I. Tolstikhina [Russie] ; K. Chebakov [Russie] ; A. Sokolov [Russie] ; P. Rodionov [Russie] ; S. Kanorski [Russie] ; V. Sorokin [Russie]

Source :

Applied physics. B, Lasers and optics : (Print) [ 0946-2171 ] ; 2007.

RBID : Pascal:08-0061178

Descripteurs français

Pascal (Inist)
- Refroidissement par laser, Faisceau atomique, Laser bleu, Horloge atomique, Spectrométrie absorption, Etat fondamental, Domaine temps ns, Structure fine, Spectrométrie saturation, Structure hyperfine, Transition dipolaire magnétique, Lanthanide Atome, Thulium 169, Thulium Atome, 3270C, 3280P, Tm, 3280F, 0630F.

English descriptors

KwdEn :
- Absorption spectroscopy, Atomic beams, Atomic clocks, Blue laser, Fine structure, Ground states, Hyperfine structure, Laser cooling, Magnetic dipole transition, Rare earths Atoms, Saturation spectroscopy, Thulium 169, Thulium Atoms, ns range.

Abstract

We have studied possible candidates for laser cooling transitions in 109Tm in the spectral region of 41U-42U nm. By means of saturation absorption spectroscopy, we have measured the hyperfine structure and rates of two nearly closed cycling transitions from the ground state 4 f¹³6s² (²F₀) (J_g = 7/2) to upper states 4f¹²(3H5)5d3/26s2(Je = 9/2) at 410.6 nm and 4f¹²(³F₄)5d_5/26s²(J_e = 9/2) at 420.4 nm and evaluated the life times of the excited levels as 15.9(8) ns and 48(6)ns, respectively. Decay rates from these levels to neighboring opposite-parity levels are evaluated by means of Hartree-Fock calculations. We conclude that the strong transition at 410.6 nm has an optical leak rate of less then 2 x 10^-5 and can be used for efficient laser cooling of ¹⁶⁹Tm from a thermal atomic beam. The hyperfine structure of two other even-parity levels, which can be excited from the ground state at 409.5 nm and 418.9 nm, is also measured by the same technique. In addition, we give a calculated value of 7(2) s^-1 for the rate of magnetic-dipole transition at 1.14 μm between the fine structure levels (Jg = 7/2) ↔ (J'_g = 5/2) of the ground state which can be considered as a candidate for applications in atomic clocks.

Affiliations:

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Absorption spectroscopy</term>
<term>Atomic beams</term>
<term>Atomic clocks</term>
<term>Blue laser</term>
<term>Fine structure</term>
<term>Ground states</term>
<term>Hyperfine structure</term>
<term>Laser cooling</term>
<term>Magnetic dipole transition</term>
<term>Rare earths Atoms</term>
<term>Saturation spectroscopy</term>
<term>Thulium 169</term>
<term>Thulium Atoms</term>
<term>ns range</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Refroidissement par laser</term>
<term>Faisceau atomique</term>
<term>Laser bleu</term>
<term>Horloge atomique</term>
<term>Spectrométrie absorption</term>
<term>Etat fondamental</term>
<term>Domaine temps ns</term>
<term>Structure fine</term>
<term>Spectrométrie saturation</term>
<term>Structure hyperfine</term>
<term>Transition dipolaire magnétique</term>
<term>Lanthanide Atome</term>
<term>Thulium 169</term>
<term>Thulium Atome</term>
<term>3270C</term>
<term>3280P</term>
<term>Tm</term>
<term>3280F</term>
<term>0630F</term>
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<front><div type="abstract" xml:lang="en">We have studied possible candidates for laser cooling transitions in 109Tm in the spectral region of 41U-42U nm. By means of saturation absorption spectroscopy, we have measured the hyperfine structure and rates of two nearly closed cycling transitions from the ground state 4 f<sup>13</sup>
6s<sup>2</sup>
 (<sup>2</sup>
F<sub>0</sub>
) (J<sub>g</sub>
 = 7/2) to upper states 4f<sup>12</sup>
(3H5)5d3/26s2(Je = 9/2) at 410.6 nm and 4f<sup>12</sup>
(<sup>3</sup>
F<sub>4</sub>
)5d<sub>5/2</sub>
6s<sup>2</sup>
(J<sub>e</sub>
 = 9/2) at 420.4 nm and evaluated the life times of the excited levels as 15.9(8) ns and 48(6)ns, respectively. Decay rates from these levels to neighboring opposite-parity levels are evaluated by means of Hartree-Fock calculations. We conclude that the strong transition at 410.6 nm has an optical leak rate of less then 2 x 10<sup>-5</sup>
 and can be used for efficient laser cooling of <sup>169</sup>
Tm from a thermal atomic beam. The hyperfine structure of two other even-parity levels, which can be excited from the ground state at 409.5 nm and 418.9 nm, is also measured by the same technique. In addition, we give a calculated value of 7(2) s<sup>-1</sup>
 for the rate of magnetic-dipole transition at 1.14 μm between the fine structure levels (Jg = 7/2) ↔ (J'<sub>g</sub>
 = 5/2) of the ground state which can be considered as a candidate for applications in atomic clocks.</div>
</front>
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<name sortKey="Kanorski, S" sort="Kanorski, S" uniqKey="Kanorski S" first="S." last="Kanorski">S. Kanorski</name>
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<name sortKey="Sokolov, A" sort="Sokolov, A" uniqKey="Sokolov A" first="A." last="Sokolov">A. Sokolov</name>
<name sortKey="Sorokin, V" sort="Sorokin, V" uniqKey="Sorokin V" first="V." last="Sorokin">V. Sorokin</name>
<name sortKey="Tolstikhina, I" sort="Tolstikhina, I" uniqKey="Tolstikhina I" first="I." last="Tolstikhina">I. Tolstikhina</name>
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Blue laser cooling transitions in Tm I

Blue laser cooling transitions in Tm I

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