Abstract:
The resonant excitation of the 83Kr first excited nuclear level (E=9.4 keV) by solar axions whose fluxes depend on the axion–electron coupling constant gAe is sought. The γ- and X-ray photons and the conversion and Auger electrons from the excited-level relaxation are detected with a gas proportional counter of a low-background detector in the underground Baksan Neutrino Observatory (Institute for Nuclear Research, Russian Academy of Sciences). As a result, a new constraint |gAe(g3AN−g0AN)|≤1.50×10−17 (90% C.L.) has been obtained for the axion–electron and axion–nucleon coupling constants, which corresponds to new constraints on the axion mass mA≤320 eV and mA≤4.6 eV in the KSVZ and DFSZ axion models, respectively.
Citation:
Yu. M. Gavrilyuk, A. N. Gangapshev, A. V. Derbin, I. S. Drachnev, V. V. Kazalov, V. V. Kuzminov, M. S. Mikulich, V. N. Muratova, D. A. Tekueva, E. V. Unzhakov, S. P. Yakimenko, “New constraints on the axion–electron coupling constant for solar axions”, Pis'ma v Zh. Èksper. Teoret. Fiz., 116:1 (2022), 13–19; JETP Letters, 116:1 (2022), 11–17