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Excitation transfer between excited levels of He (n = 3, 4) by dye laser pumping

K. Fukuda, S. Oku, Naoki Yasumaru

Published Jan 1, 1979• 0 citations

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STIMULATED EMISSION BASED ON TWO-STEP HYBRID RESONANCE $A^{1}\Sigma_{u}^{+}$ OR $B^{1}\Pi_{u}$ STATE OF $Na.^{*}$

L. J. Qin, Z. G. Wang, K. C. Zhang +1 more

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peac

Excitation transfer between excited levels of He (n = 3, 4) by dye laser pumping

K. Fukuda, S. Oku, Naoki Yasumaru

Published Jan 1, 1979• 0 citations

OpenAlex

Related papers

Study of excitation transfers by dye laser pumping

Raymond J. Vetter, Roland M. Damaschini, J. Cahen +1 more

Journal of Physics B Atomic and Molecular PhysicsAug 21, 19756 citations

Transfer excitation energy between n=5 levels in He I

S. A. Bagaev, O. V. Oginets, Valerii B Smirnov +2 more

Optics and SpectroscopySep 1, 19770 citations

ENERGY TRANSFER IN COLLISIONS BETWEEN TWO EXCITED CESIUM ATOMS

SHEN YI-FAN, LI WAN-XING, 新疆大学物理系,乌鲁木齐830046

Cesium molecules are pumped by a CW dye laser. Some of the excited molecules then pre-dissociate or collisionally transfer excitation to produce excited atoms at the 5D and 6P levels. The cross sections (in units of 10-14cm2) for the excitation transfer process Cs(6P)+Cs(5D) →Cs(7DJ)+Cs(6S)for J being 5/2 and 3/2 are 5. 4 ± 50% and 4. 9 ± 50%, respectively. The cross sections (in units of 10-14cm2) for the excitation transfer out of the 7D doublet [i. e. , Cs(7DJ)+Cs(6S) →states other than Cs(7D)] for J being 5/2 and 3/2 are 1. 6 ±50% and 0. 34±50%, respectively. To obtain these cross sections, the intensities of 7D and 5D fluorescence emissions and the 6P atom density are measured by using the absorption equivalent width technique. The results are discussed in eomparison with those of other experiments.Cesium molecules are pumped by a CW dye laser. Some of the excited molecules then pre-dissociate or collisionally transfer excitation to produce excited atoms at the 5D and 6P levels. The cross sections (in units of 10-14cm2) for the excitation transfer process Cs(6P)+Cs(5D) →Cs(7DJ)+Cs(6S)for J being 5/2 and 3/2 are 5. 4 ± 50% and 4. 9 ± 50%, respectively. The cross sections (in units of 10-14cm2) for the excitation transfer out of the 7D doublet [i. e. , Cs(7DJ)+Cs(6S) →states other than Cs(7D)] for J being 5/2 and 3/2 are 1. 6 ±50% and 0. 34±50%, respectively. To obtain these cross sections, the intensities of 7D and 5D fluorescence emissions and the 6P atom density are measured by using the absorption equivalent width technique. The results are discussed in eomparison with those of other experiments.

Acta Physica SinicaJan 1, 19931 citation

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Jingbo Wang, James Williams, A. T. Stelbovics +2 more

Jan 1, 19930 citations

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STIMULATED EMISSION BASED ON TWO-STEP HYBRID RESONANCE $A^{1}\Sigma_{u}^{+}$ OR $B^{1}\Pi_{u}$ STATE OF $Na.^{*}$ STIMULATED EMISSION BASED ON TWO-STEP HYBRID RESONANCE $A^{1}\Sigma_{u}^{+}$ OR $B^{1}\Pi_{u}$ STATE OF $Na.^{*}$

L. J. Qin, Z. G. Wang, K. C. Zhang +1 more

The first step of the hybrid excitation in the experiment was achieved by using a pulse broadband ($\\sim$200 {\\AA}) dye laser beam through a heat pipe oven. But the total covered pumping wavelength region from 4600 {\\AA} to 6800 {\\AA} the populated upper electronic state in $Na_{2}$ should be either $A^{\\prime}\\Sigma_{u}$ or $B^{\\prime}\\Pi_{u}$ state. The excited sodium dimers $Na_{2}^{\\ast}$ transfered their energy to sodium atoms Na by near resonace collisions and the Na then would populate up the 3P level from ground state 3s. The Na were consequentely pumped up to 4D, 5D, 5S or 6S level from 3P by using a narrowband dye laser pumped by the same $N_{2}$ laser. The infrared stimulated radiation corresponding to the transitions of 4D-4P(2.34 $\\mu$ m). 5D-4P(5.02 $\\mu$ m), 5S-4P(3.42 $\\mu$ m) and 6S-5P(7.52 $\\mu$ m) with cascade stimulated emission from 4P to 4S (2.20 $\\mu$ m) and from 5P to 5S (5.43 $\\mu$ m) were then obtained, Furthermore the dependence of the output energy on the pumping wavelengthes was measured and discussed.The first step of the hybrid excitation in the experiment was achieved by using a pulse broadband ($\\sim$200 {\\AA}) dye laser beam through a heat pipe oven. But the total covered pumping wavelength region from 4600 {\\AA} to 6800 {\\AA} the populated upper electronic state in $Na_{2}$ should be either $A^{\\prime}\\Sigma_{u}$ or $B^{\\prime}\\Pi_{u}$ state. The excited sodium dimers $Na_{2}^{\\ast}$ transfered their energy to sodium atoms Na by near resonace collisions and the Na then would populate up the 3P level from ground state 3s. The Na were consequentely pumped up to 4D, 5D, 5S or 6S level from 3P by using a narrowband dye laser pumped by the same $N_{2}$ laser. The infrared stimulated radiation corresponding to the transitions of 4D-4P(2.34 $\\mu$m). 5D-4P(5.02$\\mu$m), 5S-4P(3.42 $\\mu$m) and 6S-5P(7.52 $\\mu$m) with cascade stimulated emission from 4P to 4S (2.20 $\\mu$m) and from 5P to 5S (5.43 $\\mu$m) were then obtained, Furthermore the dependence of the output energy on the pumping wavelengthes was measured and discussed.

Jan 1, 19850 citations

STIMULATED EMISSION BASED ON TWO-STEP HYBRID RESONANCE

A^{1}\Sigma_{u}^{+}

B^{1}\Pi_{u}

STATE OF

Na.^{*}

Na_{2}

should be either

A^{\\prime}\\Sigma_{u}

B^{\\prime}\\Pi_{u}

state. The excited sodium dimers

Na_{2}^{\\ast}

transfered their energy to sodium atoms Na by near resonace collisions and the Na then would populate up the 3P level from ground state 3s. The Na were consequentely pumped up to 4D, 5D, 5S or 6S level from 3P by using a narrowband dye laser pumped by the same

N_{2}

laser. The infrared stimulated radiation corresponding to the transitions of 4D-4P(2.34

\\mu

m). 5D-4P(5.02

\\mu

m), 5S-4P(3.42

\\mu

m) and 6S-5P(7.52

\\mu

m) with cascade stimulated emission from 4P to 4S (2.20

\\mu

m) and from 5P to 5S (5.43

\\mu

m) were then obtained, Furthermore the dependence of the output energy on the pumping wavelengthes was measured and discussed.