hiː spˈɛnt sˈɛvɹəl jˈɪɹz ɐbɹˈɔːd, dˌuːɪŋ hɪz ɹᵻsˈɜːtʃ ˈɔːlsoʊ æt jˌuːnɪvˈɜːsᵻɾi ʌv ʃᵻkˈɑːɡoʊ nˈaɪntiːnhˈʌndɹɪd fˈɪfti nˈaɪn sˈɪksti, sˈɜːn nˈaɪntiːnhˈʌndɹɪd sˈɪksti fˈoːɹ sˈɪksti fˈaɪv, ˌɛmˌaɪtˈiː nˈaɪntiːnhˈʌndɹɪd sˈɪksti fˈaɪv sˈɪksti sˈɪks, ˈɪnstɪtˌʌt dˈɛs hˈɔːts ɪtˈuːdz sˌaɪəntɪfˈiːks nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi ˈeɪɾi wˈʌn, jˌuːnɪvɚsɪtˈeɪ pɪˈɛɹ ˈɛt mɚɹˈiː kjˈʊɹɹi nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi θɹˈiː ˈeɪɾi fˈoːɹ.
He spent several years abroad, doing his research also at University of Chicago (1959–60), CERN (1964–65), MIT (1965–66), Institut des Hautes Études Scientifiques (1980–81), Université Pierre et Marie Curie (1983–84).