Francium is vanishingly rare and is found only as very small traces in some uranium minerals. It has never been isolated as the pure element. As it is so radioactive, any amount formed would decompose to other elements.
Actinium decays by b decay most of the time but about 1% of the decay is by a decay. The "daughter" element of this reaction, which used to be called actinium-K, is now recognized as 22387Fr - the longest-lived isotope of actinium with a half life of about 22 minutes.
its obvious when you put it like that i thought you meant copper peroxide which would give a dfferent reaction altogether, providing you can extract it from the core
you have to remember that radioactive materials are always in a state of oxidation, the higher the purity of material the higher the rate of oxidation, producing at least heat.this is one reason it is hard to hide radioactive materials because it has a higher heat index due to the oxidation and in any significant it would be easily detectable. If mixed the two elements would prouduce heat and light due to the repide oxidation/explode or become so hot so fast that it would burn everything around it at such a rapid rate it would be mind boggling and very hard to predict the ultimate outcome