What are becquerel rays?

Becquerel works with uranium and its compounds, they consist of a mixture of alpha, beta, and gamma rays

Becqerel rays are quickly established that a variety of uranium salts, whether phosphorescent or not, have the same property; proving that the radiation is an intrinsic characteristic of uranium. He referred to the emitted rays as 'uranic rays', and was able to show that they could electrify the air.