Search for solar axions by Primakoff effect with the full dataset of the CDEX-1B Experiment

We present the first limit on $g_{A\gamma }$ coupling constant using the Bragg-Primakoff conversion based on an exposure of 1107.5 kg days of data from the CDEX-1B experiment at the China Jinping Underground Laboratory. The data are consistent with the null signal hypothesis, and no excess signals are observed. Limits of the coupling $g_{A\gamma }<2.08\times {10}^{-9}$ GeV${}^{-1}$ (95% C.L.) are derived for axions with mass up to 100 eV/$c^2$. Within the hadronic model of KSVZ, our results exclude axion mass $>5.3\mathrm{e}\mathrm{V}\mathrm{/}{c}^2$ at 95% C.L.