Interaction of light beams propagating in 2S, 2P atomic hydrogen ; II generation of periodicities.

Summary form only given. Suppose that a long cell contains low pressure hydrogen at a temperature of 10 000 K. This hydrogen is atomic, neutral A beam having a continuous spectrum in the far UV pumps atoms to the 2P state. If the intensity is strong, the spectrum is shifted of a spectral element before a full absorption on the Ly alpha line, so that new atoms are excited and the shift is permanent (run phase). During this frequency shift, the absorption lines sweep the spectrum, producing lines whose width is the final frequency shift. The obtained wide, weak lines are not detectable. On the contrary, if the intensity at the Ly alpha line is low, the full absorption close to the Ly alpha line does not produce enough 2P hydrogen, so that the frequency shift stops (stop phase). All absorption lines are strongly written in the spectrum. However, some 2P or 2S (metastable) hydrogen is produced by the decay of high states pumped by other Lyman lines, so that it remains a slow redshifting effect during the stop phase. If the low intensity results from a previous absorption, the Ly alpha line may be reached by frequencies which were not absorbed. The fast redshift restarts (run phase) until other absorption lines written in the spectrum, in particular the Ly beta and Ly gamma lines, are shifted to the Ly alpha frequency. The corresponding frequency shifts, relative to the Ly alpha line are z = 3*0.062 and 4*0.062 respectively. Consequently, we obtain an absorption spectrum in which a periodicity 0.062 of redshifts appears. This run-stop process continues until it does not remain hydrogen or UV light. A stop phase requires a longer path than a run phase, so that there is a large probability that the process ends during a stop phase, producing finally absolute redshifts multiple of 0.062