[**B96**]{} n.1,2 (1980) 159

Д.Н. Абдурашитов [*и др.*]{}, Препр. ИЯИ РАН, 861/94, Москва (1994)

F.V. Tkachov, arXiv:physics/0604127.

A.V. Lokhov, F.V. Tkachov, P.S. Trukhanov, NIM **A686** (2012) 162, arXiv:1111.4835

О.В. Казаченко, частное сообщение

Figure captions and some text in English {#sec:eng .unnumbered}
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This is a proposal of very simple measurement so mostly it is described in the abstract. In addition let us comment figures.

Fig.1 - red line is an upper limit on mixing of the experiment due to statistics of 10$^{12}$ events.

Fig.2 - the normalized spectrum of tritium electrons in case of m$_s$=3 keV and U$^2$=0.1 is presented; magenta line is pure spectrum without sterile neutrino S$_l$; blue line is the same one but reduced by 0.9 factor; red line is pure sterile neutrino spectrum S$_s$ reduced by 0.1; black line is mixed one S=0.9xS$_l$ + 0.1xS$_s$.

Fig.3 - the difference (S$_l$ - S) is shown; we derive a J as the (S$_l$ - S) being integrated over some energy range; for the purpose of this work we chooze the range to be 10 to 18 keV. In this case J is a measure of distortion.

Note: in real measurement we obtain the S only; no information about 