Experimental study on an all gas-phase iodine laser using microwave discharge of Cl2/He as a Cl atoms source.
Microwave discharge of a Cl2/He mixture as a simple, clean and efficient Cl atom generator was used for an all gas-phase iodine laser study. Sufficient NCl(a1Delta) was produced through the reaction of HN3+2Cl-->NCl(a1Delta)+HCl+N2. The energy transfer reaction of I(2P3/2)+NCl(a1Delta)-->I(2P1/2)+NCl(X3Sigma) was observed. A population inversion was observed directly by using a 1315 nm tunable diode laser by scanning the entire line shape of the (3,4) hyperfine transition of iodine, and a small signal gain of 5x10(-5) cm-1 was obtained.
Experimental study on supersonic all gas-phase iodine laser driven by NF3/D2/DCl/CF3I combustion
A supersonic all gas-phase iodine laser driven by NF3/D2/DCl/CF3I combustion has been experimentally studied. the gain signals of I(2P3/2,F=4)← I(2P1/2,F=3) at 1315.246nm and I(2P3/2,F=3)← I(2P1/2,F=3) at 1315.222nm were observed with an intensity of 3x10-5cm-1 and 1x10-5cm-1 respectively. The small signal gain of I(2P3/2,F=4)← I(2P1/2,F=3) at different location relative to HN3 injector along the flow direction also was obtained. The experimental results indicate that the AGIL driven by NF3/D2/DCl/CF3I combustion is feasible.
A theoretical description of the radiative decay processes (b 1Σ+, a 1Δ)→X 3Σ− in NF
A recently developed methodology based on the Breit–Pauli approximation and the symbolic matrix element method is used to consider the spin‐forbidden radiative decay processes, b 1Σ+→X 3Σ− and a 1Δ→X 3Σ− in NF. We report nonrelativistic potential energy curves for the b 1Σ+, a 1Δ, and X 3Σ− states and geometry dependent spin‐forbidden transition moments, μ∥ ≡μ0(b 1Σ+0+, X 3Σ−0+), μ⊥ ≡−μ−1(b1Σ+0+, X3Σ−1), and μ1(a 1Δ2, X 3Σ−1) based on large scale MCSCF/CI wave functions (∼5–9×104 CSF’s). Mean values for μ∥, μ⊥, and μ1(a 1Δ2, X 3Σ−1) corresponding to v=0 harmonic oscillator functions are found to be 0.181×10−2, 0.467×10−3, and 0.278×10−3 a.u., respectively. The mean value of the ratio μ∥/ μ⊥ is found to be, 〈μ∥〉0,0/ 〈μ⊥〉0,0 ∼3.87. These results are in good agreement with the available experimental data.