Speakers
Prof.
Alexander Derbin
(Petersburg Nuclear Physics Institute)
Mr.
Evgeniy Unzhakov
(Petersburg Nuclear Physics Institute)
Description
Yu.M. Gavrilyuk$^1$, A.M. Gangapshev$^1$, A.V. Derbin$^2$, I.S. Drachnev$^2$, V.V. Kazalov$^1$, V.V.Kuzminov$^1$, V.N. Muratova$^2$, S.I. Panasenko$^1$, S.S. Ratkevich$^1$, D.A. Tekueva$^1$, E.V.Unzhakov$^2$, S.P. Yakimenko$^1$
$^1$Institute for Nuclear Research RAS, Moscow, Russia
$^2$NRC "Kurchatov Institute" Petersburg Nuclear Physics Inst., Gatchina, Russia
A search for solar axions using resonant absorption by $^{83}\rm{Kr}$ nuclei is continued with the krypton proportional counter at the Baksan Neutrino Observatory. The absorption should lead to the excitation of lower nuclear energy level of $^{83}\rm{Kr}$: $A + ^{83}\rm{Kr} \rightarrow ^{83}\rm{Kr}^*\rightarrow ^{83}\rm{Kr} + \gamma~ \rm{(8.41 keV)}$. The obtained model independent upper limit on the combination of isoscalar and isovector axion-nucleon couplings $|g_3-g_0|\leq 8.4\times 10^{-7} $ allows to set a new upper limit on the hadronic (KSVZ) axion mass of $m_{A}\leq 65 $ eV ($95\%$ C.L.) with the generally accepted values $S$=0.5 and $z$=0.56. The resonant absorption of the Primakoff solar axions constrains on the axion–photon coupling and axion mass $|g_{A\gamma}\times m_A| \leq 6.3\times 10^{-17}$ that corresponds to the upper limit on KSVZ axion mass $m_{A}\leq 14.3$ eV. For solar axions produced by Compton and bremsstrahlung like processes the limit on axion-electron coupling and KSVZ axion mass are $|g_{Ae}\times m_A| \leq 1.8 \times 10^{-9}$~eV and $m_A \leq 98$ eV, correspondingly (all at 95$\%$ C.L.).
Primary authors
Prof.
Alexander Derbin
(Petersburg Nuclear Physics Institute)
Mr.
Evgeniy Unzhakov
(Petersburg Nuclear Physics Institute)
