Yuri Ralchenko 2007 J. Phys. B: At. Mol. Opt. Phys. 40 F175 doi:10.1088/0953-4075/40/11/F01
Yuri Ralchenko
Show affiliationsThe magnetic-octupole (M3) and electric-quadrupole (E2) transitions between the ground state 3d101S0 and the lowest excited 3d94s(5/2, 1/2)J = 3 and J = 2 states in the Ni-like tungsten are shown to exhibit a strong dependence on electron density Ne in the range of values typical for tokamak plasmas. Remarkably, the total intensity of these overlapping lines remains almost constant, which may explain the strong emission in the 7.93 Å line observed in tokamak experiments (Neu R et al 1997 J. Phys. B: At. Mol. Opt. Phys. 30 5057). Utilization of the M3 and E2 line ratios for density diagnostics in high-spectral-resolution experiments is discussed as well.
32.70.Cs Oscillator strengths, lifetimes, transition moments
Issue 11 (14 June 2007)
Received 2 April 2007, in final form 5 April 2007
Published 23 May 2007
Yuri Ralchenko 2007 J. Phys. B: At. Mol. Opt. Phys. 40 F175
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