THE 2P(5)3L CONFIGURATIONS OF HIGHLY STRIPPED NE-LIKE IONS - POSSIBILITY OF X-RAY LASER-EMISSION

The 2p(5)3l (l = 0, 1, 2) singlet configurations of highly stripped Ne -like ions from Ar8+ to Kr26+ have been calculated using time-dependen t coupled Hartree-Fock theory, and their transition schemes are analyz ed. Many of these lines are observed from laser-produced plasmas of th e respective atoms and are useful for high-temperature plasma diagnost ics and in stellar opacity projects. The data are very useful for unde rstanding and modeling of laser action at short wavelengths, particula rly in the X-ray region. The lasing action usually occurs from transit ions with the levels 2p(5)3p-->2p(5)3s. Transition energies, oscillato r strengths, and dipolar and quadrupolar transition probabilities have been estimated for all the excitations studied. Results agree well wi th experimental and theoretical data wherever available.