Jump to Content

Collection Guide
Collection Title:
Collection Number:
Get Items:
Emilio Segrè correspondence with Cornelis Bakker, 1931-1946.
BANC MSS 2015/211 box 1
Collection Overview


Emilio Segrè correspondence with Cornelis Bakker, 1931-1946


Segrè, Emilio, creator, correspondent.


Bakker, Cornelis Jan, 1904-1960, correspondent.


Università degli studi di Roma "La Sapienza", Dipartimento di Fisica.


Contains 78 mostly typescript letters of correspondence between two prominent physicists, Emilio Segrè and Cornelis Bakker, covering the time period from August 4, 1931 to July 15, 1946. Sixty-three of the letters are from Segrè to Bakker and are signed. Fourteen of the letters are unsigned carbon copy replies to Segrè from Bakker. The letters span a large part of Segrè's career from his first teaching post in Italy at the Istituto di Roma to his time at Los Alamos working on the atomic bomb to his later work at the Lawrence Berkeley Laboratory. The letters contain references to many prominent physicists and their work as well as occasional pen-and-ink added notes including formulas and equations. Much of the correspondence deals with potential collaboration and discussions with Bakker on subjects of mutual interest. Physicists and scientists mentioned in the letters include Enrico Fermi, Pieter Zeeman, Edoardo Amaldi, Franco Rasetti, Samuel Goudsmit, Orso Corbino, Oscar D'Agostino, and Ernest O. Lawrence, several of whom later came to be known colloquially as the "Via Panisperna Boys."


1931 (issued)


n-us--- -- n-us-ca -- e-it--- -- e-ne---
Segrè, Emilio -- Correspondence
Bakker, Cornelis Jan -- 1904-1960 -- Correspondence
Fermi, Enrico -- 1901-1954
Zeeman, Pieter -- 1865-1943
Amaldi, Edoardo
Rasetti, Franco -- 1901-2001
Goudsmit, Samuel A. (Samuel Abraham) -- 1902-1978
Corbino, O. M. (Orso Mario) -- 1876-
D'Agostino, Oscar
Lawrence, Ernest Orlando -- 1901-1958
Majorana, Ettore
Manhattan Project (U.S.)
Lawrence Berkeley Laboratory.
Università degli studi di Roma "La Sapienza". -- Dipartimento di Fisica.
Nuclear physicists -- Correspondence
Physicists -- Italy -- Correspondence
Physicists -- Netherlands -- Correspondence
Jewish scientists -- Correspondence
Nuclear physics
Atomic bomb
Cyclotrons -- California -- Berkeley
Via Panisperna (Rome, Italy)


Emilio Segrè correspondence with Cornelis Bakker, 1931-1946, BANC MSS 2015/211, The Bancroft Library, University of California, Berkeley.
Gift of Fausta Segrè Walsby ; 2016.
Related collection: Emilio Segrè papers (BANC MSS 78/72 cp).
Related collection: Emilio Segrè letters to Kenkichiro Koizumi (BANC MSS 2013/55).
In English and German.
Emilio Gino Segrè (January 30, 1905-April 22, 1989) was an Italian physicist and Nobel laureate who discovered the elements technetium and astatine, and the antiproton, a sub-atomic antiparticle, for which he was awarded the Nobel Prize in Physics in 1959.
Cornelis Jan Bakker (March 11,1904-April 23, 1960) was a Dutch physicist and a founder of the European Organization for Nuclear Research known as CERN. Bakker studied physics at the University of Amsterdam under Pieter Zeeman and was a member of the Royal Netherlands Academy of Sciences.
The "Via Panisperna Boys" was a group of young scientists led by Enrico Fermi at the Istituto di Roma, La Sapienza. The other members of the group were Emilio Segrè, Edoardo Amaldi, Oscar D'Agostino, Ettore Majorana, Bruno Pontecorvo, and Franco Rasetti. All of them were physicists, except for D'Agostino who was a chemist. In 1934, they made the famous discovery of slow neutrons which later made possible the nuclear reactor, and then the construction of the atomic bomb.

Physical Description:

0.2 (1




BANC MSS 2015/211 box 1