The results of measurements performed using UCN storing method are in good agreement. The latest most accurate measurements of the neutron decay asymmetry and neutron lifetime measurements by storage method are in agreement within the Standard Model. However, there is a significant discrepancy at 3.6σ (1% of decay probability) level with beam method experiment. This article discusses the possible causes of discrepancy in the measurements of the neutron lifetime with beam method experiment. The most probable cause, apparently, is the loss of protons in beam method experiment during storage in a magnetic trap due to charge exchange collisions of protons with the residual gas. The proton becomes neutral and leaves the trap, which leads to a decrease in the number of registered protons, i.e. to a decrease in the probability of neutron decay or to an increase in the measured neutron lifetime.

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The paper is devoted to the study of precipitation regions of high-energy electrons injected by a point source moving in near-Earth space along an elliptical orbit. The precipitation regions are constructed on the basis of numerical integration of an ordinary differential equations describing the motion of electrons in a dipole magnetic field. The influence of some parameters of the source orbit on the structure of precipitation regions is considered. They are eccentricity, focal parameter, incline angle to the selected axis in the plane of the geographic equator and the energy of injected electrons. The difference between the obtained regions and the precipitation regions formed for the motion of a point source along circular near-Earth orbit is discussed.