Searches for axioelectric effect of solar axions with BGO-scintillator and BGO-bolometer detectors

TL;DR

This paper reports a search for solar axions using BGO detectors, setting a new model-independent limit on axion coupling constants based on axioelectric absorption at 5.5 MeV.

Contribution

The study provides the first experimental limit on axion-nucleon and axion-electron couplings from solar axion searches with BGO detectors.

Findings

Set a limit of |g_{Ae}×g_{AN}^3|<1.9×10^{-10} at 90% C.L.

Used BGO scintillator and bolometer detectors for axion detection.

Constrained axion models by providing new bounds on coupling constants.

Abstract

A search for axioelectric absorption of 5.5 MeV solar axions produced in the $p + d \rightarrow {^3\rm{He}}+\gamma~(5.5~ \rm{MeV})$ reaction has been performed with a BGO detectors. A model-independent limit on the product of axion-nucleon $g_{AN}^3$ and axion-electron $g_{Ae}$ coupling constants has been obtained: $| g_{Ae}\times g_{AN}^3|< 1.9\times 10^{-10}$ for 90\% C.L..