On a way of further investigation of solar flares riched in helium 3

Experimental data on solar flares riched in 3He are discussed. It is noted that within the framework of the model of 3He heating it is possible to explain the major part of the experimental data. On the basis of the data on soft X-ray radiation the estimations of the total thermal energy for solar flares are obtained. It is shown that energy necessary for the model of 3He preheating does not contradict the observed characteristics of soft X-ray radiation. A number of the observed data indicates that flares riched in 3He occur in regions with the closed magnetic field configuration. Experiments on investigation of the isotope composition dependence on the flare latitude in the Sun. A number of the flare properties riched in 3He requiring further investigation: presence of hard X-ray burst, presence of presages in soft X radiation, relation with the solar wind structure, specific geometry of an optical flare and the dependence of isotope composition on flare latitude are pointed out