We have measured the thermal- and slow-neutron fluxes of two systems: on the soil and over a water area (Lake Seliger) and on the soil and on a glacier (the Pamirs). The information obtained confirms that the contribution from the Earth's crust to the total flux of thermal and slow neutrons in the lower atmosphere is comparable with the contribution from cosmic rays. The main contribution from the Earth's crust as a source of neutrons of such energy is associated with natural radioactivity.
Research Institute of Nuclear Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
Science News of the Faculty of Physics, Lomonosov Moscow State University
This new information publication, which is intended to convey to the staff, students and graduate students, faculty colleagues and partners of the main achievements of scientists and scientific information on the events in the life of university physicists.