DETECTION OF ANOMALOUS SELF-REVERSAL OF EMISSION-LINES OF A LASER-PLASMA FORMED ON THE SURFACE OF A SOLID TARGET IN A NORMAL ATMOSPHERE

Anomalous self-reversal of the aluminium emission lines 396.1 and 394. 4 nm was detected experimentally, The lines emitted by the hotter regi ons of a laser plasma ban the surface of an aluminium target did not c oincide with the absorption lines of the same atoms in colder regions of the plasma plume. Consequently, the centre of a dip isr the emissio n lints, resulting from self-absorption, was not at the line centre, A qualitative explanation of the effect was based on a shock-wave-induc ed Stark shift of an emission line of a hot plasma region.