 Creutz encountered several members of the faculty at the University of Wisconsin , including Julian Mack , Ragnar Rollefson , Raymond Herb , Eugene Wigner and Gregory Breit . Mack gave Creutz a research project to do in his junior year . Creutz remained at Wisconsin as a graduate student after receiving his Bachelor of Science ( B.S. ) degree in 1936 , working for Herb upgrading the departmental Van de Graaff generator from 300 to 600 keV . With this done , the question became what to do with it , and Breit suggested that it had previously been observed that high @-@ energy gamma rays were produced when lithium was bombarded with protons at 440 keV . Creutz therefore wrote his 1939 Doctor of Philosophy ( Ph.D. ) thesis on Resonance Scattering of Protons by Lithium , under Breit 's supervision . Creutz married Lela Rollefson , a mathematics student at Wisconsin , and the sister of Ragnar Rollefson , on September 13 , 1937 . The couple had three children , two sons , Michael and Carl , and a daughter , Ann Jo . 
 Creutz encountered several members of the faculty at the University of Wisconsin , including Julian Mack , Ragnar Rollefson , Raymond Herb , Eugene Wigner and Gregory Breit . Mack gave Creutz a research project to do in his junior year . Creutz remained at Wisconsin as a graduate student after receiving his Bachelor of Science ( B.S. ) degree in 1936 , working for Herb upgrading the departmental Van de Graaff generator from 300 to 600 keV . With this done , the question became what to do with it , and Breit suggested that it <a href='been_done' title='1'><mark>had</mark></a> previously been observed that high @-@ energy gamma rays <a href='uninflect' title='2'><mark>were</mark></a> produced when lithium was bombarded with protons at 440 keV . Creutz therefore wrote his 1939 Doctor of Philosophy ( Ph.D. ) thesis on Resonance Scattering of Protons by Lithium , under Breit <a href='null_genetive' title='3'><mark>'s</mark></a>supervision . Creutz married Lela Rollefson , a mathematics student at Wisconsin , and the sister of Ragnar Rollefson , on September 13 , 1937 . The couple had three children , two sons , Michael and Carl , and a daughter , Ann Jo . 
Creutz encountered several members of da faculty at the University of Wisconsin , including Julian Mack , Ragnar Rollefson , Raymond Herb , bham Wigner and Gregory Breit . Mack gave Creutz a research project to do in his junior year . Creutz remained at Wisconsin as a graduate student after receiving his Bachelor of Science ( B.S. ) degree in 1936 , workin for Herb upgrading the departmental Van de Graaff generator from 300 to 600 keV . w this done , tdaquestion became wht to do with it , and Breit suggested dat it done previously been observed that high @-@ energy gamma rays was produced when lithium was bombarded witwidotons at 440 keV . Creutz therefore wrote his 1939 Doctor of Philosophy ( Ph.D. ) thesis on Resonance Scattering of Protons by Lithium , under Breit  supervision . Creutz married Lela Rollefson , a mathematics student at Wisconsin , and thdaister of Ragnar Rollefson , on September 13 , 1937 . Thedauple had three children , two sons , Michael and Carl , and a daughter , Ann Jo .