To study the behavior of converging shock waves, Robert Serber devised the RaLa Experiment, which used the short-lived radioisotope lanthanum-140, a potent source of gamma radiation.
Para estudar o comportamento das ondas de choque converxentes, Robert Serber ideou o experimento RaLa, que utilizaba o radioisótopo de curta vida lantano-140, unha potente fonte de radiación gamma.