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The time and wavelength dependencies of luminescence resulted from 11 low-lying Cd II levels in He-Cd medium excited by 252 Cf fission fragments have been measured in the temperature range from 553 to 669 K and various buffer gas pressures (1.5-5 atm). The method used is based upon applying multichannel coincidence technique and single-photon spectrometry. The lifetime, pumping rate, and luminescence spectral line width data obtained for 325-and 441.6-nm transitions have been used to estimate lasing characteristics of He-Cd medium under optimal conditions.

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