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The soft X-rays emitted in the 6-8.5 AA range from dense plasmas produced in solid aluminium targets by ultrashort laser pulses have been analyzed. Lines resulting from lithium-like, helium-like and hydrogen-like ion transitions were identified. The intensity ratio of the Al XI transition 1s2p2 2D-1s22p 2p with respect to the Al XII resonance line decreases when the pulse duration varies from 15 to 50 ps. Various plasma parameters T, Tz and nc were estimated in both cases.
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Tuilier et al. (1977) studied this question.
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