STUDY OF ANOMALOUS LASING BEHAVIOR ON THE 2 J=0-1 TRANSITIONS IN NE-LIKE-V

We present an experimental report on the recent observation of lasing at 26.1 and 30.4 nm on the 3p(1)S(0)-3s(3)P(1), [termed G(0-1)] and 3p (1)S(0)-3s(1)P(1) [termed E(0-1)] transitions in Ne-like V, in which t he normally weak G(0-1) transition was observed to lase more strongly than the E(0-1) transition. The experiment was performed on the Asteri x IV iodine laser with a prepulse 5.23 ns before the main pulse. At a target length of about 2.5 cm, it was found that, while the G(0-1) and E(0-1) lines have comparable intensities in V, the E(0-1) line domina tes spectra from Mn, Cr, Ti and Sc, which have adjacent nuclear charge s. It was also found that the two lasers in V also have different temp oral histories and spatial distributions. This is in contrast to the L ASNEX + XRASER simulation, which predicts virtually similar temporal a nd spatial behavior for the two transitions.