Effect of iodine on the laser power of a Cd(II) 441.6-nm line in a positive-column He-Cd+laser

It has been shown that a small amount of iodine added to the He-Cd+ laser discharge increases the laser power of a Cd(II) 441.6- nm line by 30-40 percent and also the electron temperature by a few percent, while the electron density is not changed considerably.