To him who, in the love of nature, finds occasion to investigate, say, the nuclear properties of europium‐152, nature offers a variety of approaches. The two lowest states have half‐lives of 13 years and 9.3 hours, so their decay properties can be conveniently studied. Further, these states live long enough to be subjected to atomic‐beam, isotope‐shift, isomer‐shift, mass‐spectrometer, and cross‐section experiments, and some such studies have been reported. Higher levels inEu152can be studied via neutron capture gamma rays and neutron resonances. They can also be studied through reactions, such asEu151(d,p),Eu153(d,t),orSm149(&agr;,p).