Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Soviet Journal of Quantum Electronics

Simple method for determination of stimulated emission cross section of2P1/2(F=3)→2P3/2(F'=4) transition in atomic iodine

V. I. Babkin, S V Kuznetsova, Aleksandr I Maslov

Published Mar 31, 1978• 6 citations
Publisher

Abstract

It is shown that the stimulated emission cross section σ 3—4 of the 2 P 1/2 ( F =3)→ 2 P 3/2 ( F' =4) transition in iodine can be determined without allowance of the influence of chemical reactions on the population inversion and mixing of sublevels with the ground 2 P 3/2 and excited 2 P 1/2 states of iodine. A report is given of measurements of the σ 3—4 cross section as a function of the pressure of CF 3 I, n -C 3 F 7 I, and i -C 3 F 7 I vapors and of He, Ne, Ar, and Xe inert gases. The collisional (impact) widths of the transition profile and of the coefficients of collisional broadening by these gases are obtained. A comparison is made with the theory and with the results of published investigations.

DOI
10.1070/qe1978v008n03abeh009995

Related papers

Collision-induced I(52P1/2–52P3/2) radiative transition

L S Ershov, V Yu Zalesskiĭ

An investigation was made of the dependences of the initial I(5 2 P 1/2 )→I(5 2 P 3/2 )+ hν ( λ = 1315nm) luminescence signal on the pressure and nature of the buffer gases. Atoms of I in the 5 2 P 1/2 state were formed, in initial concentrations of (0.5–3) × 10 16 cm −3 , as a result of photolysis of CF 3 I (0.01 atm) by the fourth harmonic of a Q -switched neodymium laser ( E ∼0.6 J, τ ∼2 × 10 −3 sec). The I(5 2 P 1/2 ) luminescence was recorded by a germanium photodiode whose time constant was (3–4) × 10 −7 sec. When CF 3 I was diluted with Ar, Xe, and SF 6 buffer gases, the intensity of the luminescence of the I(5 2 P 1/2 ) atoms increased because of an increase in the probability of the 5 2 P 1/2 →5 2 P 3/2 transition as a result of collisions of the iodine atoms with the atoms or molecules of the buffer gases. The dependence of the probability of the investigated transition on the nature and pressure of the buffer gases was determined in the pressure range ∼0–1 atm. Estimates were obtained of the oscillator strengths corresponding to the matrix elements of the induced electric dipole moment due to the deformation of the electron shells of the iodine atoms in collisions.

Soviet Journal of Quantum Electronics•May 31, 1978•7 citations

Dynamics of self-interaction of neodymium laser radiation in II–VI semiconductors

Anatoly A. Borshch, М. С. Бродин, N N Krupa

An investigation was made of the dependences of the initial I(5 2 P 1/2 )→I(5 2 P 3/2 )+ hν ( λ = 1315nm) luminescence signal on the pressure and nature of the buffer gases. Atoms of I in the 5 2 P 1/2 state were formed, in initial concentrations of (0.5–3)×10 16 cm −3 , as a result of photolysis of CF 3 I (0.01 atm) by the fourth harmonic of a Q -switched neodymium laser ( E ∼0.6 J, τ ∼2×10 −3 sec). The I(5 2 P 1/2 ) luminescence was recorded by a germanium photodiode whose time constant was (3–4)×10 −7 sec. When CF 3 I was diluted with Ar, Xe, and SF 6 buffer gases, the intensity of the luminescence of the I(5 2 P 1/2 ) atoms increased because of an increase in the probability of the 5 2 P 1/2 →5 2 P 3/2 transition as a result of collisions of the iodine atoms with the atoms or molecules of the buffer gases. The dependence of the probability of the investigated transition on the nature and pressure of the buffer gases was determined in the pressure range ∼0–1 atm. Estimates were obtained of the oscillator strengths corresponding to the matrix elements of the induced electric dipole moment due to the deformation of the electron shells of the iodine atoms in collisions.

Soviet Journal of Quantum Electronics•May 31, 1978•0 citations

Coherence Transfer between the 2P1/2 and 2P3/2 States in Potassium, Induced in Collisions with Noble Gas Atoms and with Molecules

B. Niewitecka, L. Krause

The transfer of coherence accompanying 42P1/2 → 42P3/2 transfer of excitation induced in collisions between 42P1/2 potassium atoms and noble gas atoms as well as some simple molecules, was studied in a series of sensitized fluorescence experiments. Mixtures of potassium vapor at 6 × 10−7 Torr with the various buffer gases were irradiated with circularly polarized D1(σ+) light and the relative intensities of the σ+ and σ− fractions of both the D1 and D2 fluorescent components were determined in relation to the pressures of the buffer gases. The experiments yielded the following cross sections for coherence transfer: K–He:1.7 Å2; K–Ne :0.8 Å2; K–Ar < 0.5 Å2; K–H2 :3.5 Å2; K–CH4 :7.0 Å2; K–CD4:7.7 Å2.

Canadian Journal of Physics•Feb 15, 1973•6 citations

Characteristics of the stimulated emission from iodine atoms in pulsed magnetic fields

Белоусова Инна Михайловна, B D Bobrov, Valery M. Kiselev +1 more

An investigation was made of the influence of pulsed magnetic fields on the characteristics of the stimulated radiation resulting from the 2 P 1/2 – 2 P 3/2 transition in iodine atoms. It was found that pulsed magnetic fields could be used to modulate the gain and the output power of this iodine laser.

Soviet Journal of Quantum Electronics•Jun 30, 1974•6 citations

Hanle-effect studies on the (5p46s)P524 state of iodine

Lloyd G. Williams, David R. Crosley

Hanle-effect measurements have been made on the $(5{p}^{4}6s)^{4}P_{\frac{5}{2}}$ state of iodine, which is connected to the ground state via the 1830-\AA{} line. The atomic iodine is produced by thermal dissociation of ${\mathrm{I}}_{2}$, and is excited by unpolarized resonance radiation. Using the value of ${g}_{J}$ obtained by Keiss and Corliss from high-field Zeeman splittings, we find a radiative life-time of 57.9 \ifmmode\pm\else\textpm\fi{} 1.4 nsec (all errors quoted are 67% confidence limits). Neither coherence narrowing nor self-broadening is observed, and we place an upper limit of 200 ${\mathrm{\AA{}}}^{2}$ on the latter process. Cross sections for broadening of the Hanle effect by the rare gases are found to be (in ${\mathrm{\AA{}}}^{2}$): He: 9.8 \ifmmode\pm\else\textpm\fi{} 1.1; Ne: 19.5 \ifmmode\pm\else\textpm\fi{} 1.6; Ar: 37.6 \ifmmode\pm\else\textpm\fi{} 3.1; Kr: 38.7 \ifmmode\pm\else\textpm\fi{} 3.8; Xe: 49.2 \ifmmode\pm\else\textpm\fi{} 3.1. The relative values of these cross sections are seen to be in agreement with the predictions of a van der Waals interaction.

Physical Review A•Feb 1, 1974•10 citations

Sensitized Fluorescence in Vapors of Alkali Atoms. XIII. 62P1/2−62P3/2 Excitation Transfer in Rubidium, Induced in Collisions with Noble Gas Atoms

I. N. Siara, E. S. Hrycyshyn, L. Krause

The cross sections for excitation transfer between the 62P fine-structure substates in rubidium, induced in collisions with noble gas atoms, have been determined in a series of sensitized fluorescence experiments. Mixtures of rubidium vapor and noble gases at pressures varying in the range 0–5 Torr were irradiated with each component of the second 2P rubidium doublet in turn and the following cross sections for 2P mixing were obtained from measurements of sensitised-to-resonance fluorescent intensity ratios. Rb–He: Q12(2P1/2 → 2P3/2) = 29.3 Å2; Q21(2P1/2 ← 2P3/2) = 19.0 Å2. Rb–Ne: Q12 = 10.3 Å2; Q21 = 6.4 Å2. Rb–Ar: Q12 = 24.0 Å2; Q21 = 14.9 Å2. Rb–Kr: Q12 = 23.2 Å2; Q21 = 14.6 Å2. Rb–Xe: Q12 = 43.9 Å2; Q21 = 27.7 Å2 In their dependence on the magnitude of the fine-structure splitting, the values are consistent with previously determined cross sections for mixing in the first and third 2P doublets of alkali atoms.

Canadian Journal of Physics•Aug 15, 1972•19 citations
It is shown that the stimulated emission cross section σ 3—4 of the 2 P 1/2 ( F =3)→ 2 P 3/2 ( F' =4) transition in iodine can be determined without allowance of the influence of chemical reactions on the population inversion and mixing of sublevels with the ground 2 P 3/2 and excited 2 P 1/2 states of iodine. A report is given of measurements of the σ 3—4 cross section as a function of the pressure of CF 3 I, n -C 3 F 7 I, and i -C 3 F 7 I vapors and of He, Ne, Ar, and Xe inert gases. The collisional (impact) widths of the transition profile and of the coefficients of collisional broadening by these gases are obtained. A comparison is made with the theory and with the results of published investigations.
An investigation was made of the dependences of the initial I(5 2 P 1/2 )→I(5 2 P 3/2 )+ hν ( λ = 1315nm) luminescence signal on the pressure and nature of the buffer gases. Atoms of I in the 5 2 P 1/2 state were formed, in initial concentrations of (0.5–3) × 10 16 cm −3 , as a result of photolysis of CF 3 I (0.01 atm) by the fourth harmonic of a Q -switched neodymium laser ( E ∼0.6 J, τ ∼2 × 10 −3 sec). The I(5 2 P 1/2 ) luminescence was recorded by a germanium photodiode whose time constant was (3–4) × 10 −7 sec. When CF 3 I was diluted with Ar, Xe, and SF 6 buffer gases, the intensity of the luminescence of the I(5 2 P 1/2 ) atoms increased because of an increase in the probability of the 5 2 P 1/2 →5 2 P 3/2 transition as a result of collisions of the iodine atoms with the atoms or molecules of the buffer gases. The dependence of the probability of the investigated transition on the nature and pressure of the buffer gases was determined in the pressure range ∼0–1 atm. Estimates were obtained of the oscillator strengths corresponding to the matrix elements of the induced electric dipole moment due to the deformation of the electron shells of the iodine atoms in collisions.
An investigation was made of the dependences of the initial I(5 2 P 1/2 )→I(5 2 P 3/2 )+ hν ( λ = 1315nm) luminescence signal on the pressure and nature of the buffer gases. Atoms of I in the 5 2 P 1/2 state were formed, in initial concentrations of (0.5–3)×10 16 cm −3 , as a result of photolysis of CF 3 I (0.01 atm) by the fourth harmonic of a Q -switched neodymium laser ( E ∼0.6 J, τ ∼2×10 −3 sec). The I(5 2 P 1/2 ) luminescence was recorded by a germanium photodiode whose time constant was (3–4)×10 −7 sec. When CF 3 I was diluted with Ar, Xe, and SF 6 buffer gases, the intensity of the luminescence of the I(5 2 P 1/2 ) atoms increased because of an increase in the probability of the 5 2 P 1/2 →5 2 P 3/2 transition as a result of collisions of the iodine atoms with the atoms or molecules of the buffer gases. The dependence of the probability of the investigated transition on the nature and pressure of the buffer gases was determined in the pressure range ∼0–1 atm. Estimates were obtained of the oscillator strengths corresponding to the matrix elements of the induced electric dipole moment due to the deformation of the electron shells of the iodine atoms in collisions.
The transfer of coherence accompanying 42P1/2 → 42P3/2 transfer of excitation induced in collisions between 42P1/2 potassium atoms and noble gas atoms as well as some simple molecules, was studied in a series of sensitized fluorescence experiments. Mixtures of potassium vapor at 6 × 10−7 Torr with the various buffer gases were irradiated with circularly polarized D1(σ+) light and the relative intensities of the σ+ and σ− fractions of both the D1 and D2 fluorescent components were determined in relation to the pressures of the buffer gases. The experiments yielded the following cross sections for coherence transfer: K–He:1.7 Å2; K–Ne :0.8 Å2; K–Ar < 0.5 Å2; K–H2 :3.5 Å2; K–CH4 :7.0 Å2; K–CD4:7.7 Å2.
Hanle-effect measurements have been made on the (5p46s)4P52(5{p}^{4}6s)^{4}P_{\frac{5}{2}}(5p46s)4P25​​ state of iodine, which is connected to the ground state via the 1830-\AA{} line. The atomic iodine is produced by thermal dissociation of I2{\mathrm{I}}_{2}I2​, and is excited by unpolarized resonance radiation. Using the value of gJ{g}_{J}gJ​ obtained by Keiss and Corliss from high-field Zeeman splittings, we find a radiative life-time of 57.9 \ifmmode\pm\else\textpm\fi{} 1.4 nsec (all errors quoted are 67% confidence limits). Neither coherence narrowing nor self-broadening is observed, and we place an upper limit of 200 A˚2{\mathrm{\AA{}}}^{2}A˚2 on the latter process. Cross sections for broadening of the Hanle effect by the rare gases are found to be (in A˚2{\mathrm{\AA{}}}^{2}A˚2): He: 9.8 \ifmmode\pm\else\textpm\fi{} 1.1; Ne: 19.5 \ifmmode\pm\else\textpm\fi{} 1.6; Ar: 37.6 \ifmmode\pm\else\textpm\fi{} 3.1; Kr: 38.7 \ifmmode\pm\else\textpm\fi{} 3.8; Xe: 49.2 \ifmmode\pm\else\textpm\fi{} 3.1. The relative values of these cross sections are seen to be in agreement with the predictions of a van der Waals interaction.
The cross sections for excitation transfer between the 62P fine-structure substates in rubidium, induced in collisions with noble gas atoms, have been determined in a series of sensitized fluorescence experiments. Mixtures of rubidium vapor and noble gases at pressures varying in the range 0–5 Torr were irradiated with each component of the second 2P rubidium doublet in turn and the following cross sections for 2P mixing were obtained from measurements of sensitised-to-resonance fluorescent intensity ratios. Rb–He: Q12(2P1/2 → 2P3/2) = 29.3 Å2; Q21(2P1/2 ← 2P3/2) = 19.0 Å2. Rb–Ne: Q12 = 10.3 Å2; Q21 = 6.4 Å2. Rb–Ar: Q12 = 24.0 Å2; Q21 = 14.9 Å2. Rb–Kr: Q12 = 23.2 Å2; Q21 = 14.6 Å2. Rb–Xe: Q12 = 43.9 Å2; Q21 = 27.7 Å2 In their dependence on the magnitude of the fine-structure splitting, the values are consistent with previously determined cross sections for mixing in the first and third 2P doublets of alkali atoms.