New limit on the mass of 9.4-keV solar axions emitted in an M1 transition in ${}^{83}$Kr nuclei

A search for resonant absorption of the solar axion by ${}^{83}\mathrm{K}\mathrm{r}$ nuclei was performed using the proportional counter installed inside the low-background setup at the Baksan Neutrino Observatory. The obtained model independent upper limit on the combination of isoscalar and isovector axion-nucleon couplings $\mathrm{\mid }{g}_3-g_0\mathrm{\mid }\le 1.69\times {10}^{-6}$ allowed us to set the new upper limit on the hadronic axion mass of $m_A\le 130$ eV (95% C.L.) with the generally accepted values $S$=0.5 and $z$=0.56.