Has the half-life of an isotope ever been accurately predicted before it could be measured? The half lives of many radioactive isotopes have been measured directly. But are their half-lives known to be a function of their composition?

In other words, can someone say "given an atom with this many protons, neutrons and electrons, and given the known strengths and ranges of the various forces at play inside an atom, we can quantify how unstable such an atom would be by saying that a collection of them would have a half-life of X"? 

Has such a prediction ever been made about an isotope before people had encountered it, then later borne out by experiment?
A quick perusal of the post-WWII literature (particularly Glenn Seaborg) pulls up papers like The New Element Californium (Atomic Number 98) where comparisons of the observed alpha decay half life are said to be in line with predictions. Such predictions follow along from papers such as Systematics of Alpha-Radioactivity.

So, yes, it would seem that predictions of radioactive half lives were part and parcel of the creation of new elements in the laboratory.