Search for 14.4 keV solar axions using a proportional Kr counter

The search for axions with an energy of 14.4 keV, arising in the nuclear M1 transition of the $^{57}$Fe isotope in the Sun, was performed using the axioelectric effect in Kr atoms. A gas proportional counter in a low-background setup located in the underground laboratory of the BNO INR RAS was used for the search. As a result, a new upper limit was established for the product of the coupling constant of an axion with an electron and the effective coupling constant with nucleons: $|g_{Ae}g_{AN}^{eff}|\le 3.2\cdot10^{-16}$ for 90% confidence level.