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.
Energy transfer from chloroimidogen (a1.DELTA.) to iodine atoms
Mixtures of CH 2 I 2 and ClN 3 are photolyzed at 193 nm to produce iodine atoms and NCl(a 1 A3), respectively. The collisional excitation of the iodine atoms to the 5 2 P 1/2 state is readily observed from the time profile of chemiluminescence from this species. From a steady-state treatment of the intensities, the rate constant for the specific energy-transfer process (i.e., the excitation of the I 2 P 1/2 state) is determined to be k=(1.8±0.3) X 10 -11 cm 3 s -1
An analysis of patients discharged from a hospital‐based glaucoma case‐finding clinic over a 3‐year period
Purpose:  To analyse the false positive referrals by community optometrists to a glaucoma case‐finding clinic over a 3‐year period.