This document consists of
4
AY
Copy No.
_of_
15
5
pages
Series, AEC-A
—g-E-eENCLOSURE I
UNIVERSITY OF CALIFORNIA
LOS ALAMOS SCIENTIFIC LABORATORY
(Contract W-7#05-ENG-36 )
P, O. BOX 1663
LOS ALAMOS, NEW MEXICO
April 15, 1955
In Reply
Refer To:
Dir-~-1037
Brig. General K, E. Fields
Director of Military Application
U. S, Atomic Energy Commission
Washington 25, D.
Dear General
C,
Fields:
Your letter of April 8, 1955 inquires as to the status of
our present understanding and Prospects with respect to so-called
"elean" weapons,
.
&
“Enviro
‘
the fission debris would, of course, be accompanied
by other material made radioactive by neutron capture, but
unless the materials surrounding the bomb were rather carefully
chosen for the purpose, the fission debris would still constitute
the major source of residual radioactivity.
RESTRICTED DATA
This document contains restricted data as
defined in the Atomic Energy Act of 1954,
Its transmittal or the disclosure of its
contents in any manner to an unauthorized
person is prohibited.
-~l-
Enclosure I