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It is known that viruses and cosmic rays make a decisive contribution to the evolution of
biological species on Earth, participating in their transformation at the genetic level, largely
determining the processes of selection [1].
Nuclear reactions involving primary cosmic radiation and atmospheric ions can lead to the
formation of secondary neutrons. The density of the background neutron flux near the Earth's
surface is 4×10-3 neutron/cm2×s [2]. While neutrons are considered as a risk factor for humans
at high latitudes [3, 4] and some health problems are registered among aircraft crews [5] there is
lack of studies about neutron interaction with biological objects at the level of the near earth
surface.
This work is conducted to the mechanism study of the cosmogenic neutron radiation effect
on the mutagenesis of biological objects on the example of rice cultures and the Oyster
mushroom.
The first stage of our study was to irradiate rice seeds of different varieties with neutrons
with E=4.1 MeV to obtain dose of 50 Gy. Irradiation was conducted at the electrostatic generator
EG-5 in the FLNP, JINR. Rice was provided by the Zhakhaev Kazakh Rice Research Institute
within the framework of the project BR10765056. The effect of the dose on the physiological
activity of the studied rice crops has been established. The next stage of the study is to irradiate
mushroom samples and to compare irradiation effects on the two different biological objects.
The study was funded by the Plenipotentiary Representative of the Government of the Poland
Republic in JINR within the framework of the Poland-JINR Cooperation Projects PPPB/120-
25/1128/2022, PPPB/120-26/1128/2022 and JINR-Serbia Cooperation Program Order 178 items
7 and 8, JINR-Belarus Cooperation Program, Order 529, paragraphs 22 and 23
[1] M.V.Ragulskaya (2019), Sun and biosphere, Radiotekhnika, 170 p.
[2] N.A.Vlasov (1982), Atomic Energy, 52(2), 87-91
[3] K.Kojo, et al. (2005), Occup.Environ.Med., 62, 488-493.
[4] G.P.Hammer, et al. (2009), Radiat.Prot.Dosim, 136, 232-239.
[5] R.Aspholm, et al. (1999), Occup.Environ.Med., 41(6), 486-491.
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