"Zeroing" of Magnetic Resonance signals and Amplitude Noises caused by frequency emission fluctuations when Pumping atoms with D2 - line in Magnetometers and gas-cell frequency Standards

Based on experimental investigations, a role of D₂ -line\´s cyclic transitions is shown in occurrence of "zeroing" signals and noise (AAN, FM-AM) and "zeroing" points displacement in cells with wall-coating when using lamp pumping. Such a phenomenon is considered as a behaviour of S_z ⁽⁰⁾ and S_x ⁽⁰⁾ signals in the Zeeman\´s structure of the hyperfine F=I+J state for various alkali atoms (¹³³Cs,⁸⁷Rb,³⁹K,⁴¹K). It is shown, in particular, that FM-AM conversion disappears and SNR increase at the point of zeroing the first derivative of resonance signal. It is proposed to use a zeroing point for laser\´s frequency stabilization as well as for contactless measurement and stabilization of temperature as regards the operating gas itself in the absorption cell.