Luis Walter Alvarez was an American experimental physicist, inventor, and professor who was awarded the Nobel Prize in Physics in 1968 for his discovery of resonance states in particle physics using the hydrogen bubble chamber. In 2007 the American Journal of Physics commented, "Luis Alvarez was one of the most brilliant and productive experimental physicists of the twentieth century." The Nobel Prize in Physics 1968, announced October 30, 1968. Luis Alvarez, “for his decisive contributions to elementary particle physics, in particular the discovery of a large number of resonance states, made possible through his development of the technique of using hydrogen bubble chamber and data analysis”. Luis Alvarez: born 1911, San Francisco, CA, USA. Wiki link Data: the Nobel Foundation (CC0).