RE: Be-7 production

[Rosen_Jerry <rosen@radsafe.pitt.edu>]

Does anyone know how much Be7 or Be-9 is produce by tertiary fission?

-----Original Message-----
From: Lester Slaback [mailto:Lester.Slaback@NIST.GOV]
Sent: Wednesday, January 26, 2000 11:05 AM
To: Multiple recipients of list
Subject: Be-7 production


As those involved with accelerators know Be-7 is made via a
photo-spallation reaction off light Z elements (O,N,C), and can be the
dominant radionuclide around high energy facilities.  The threshold for
this is around 30 MeV, so I doubt that there is a significant production in
reactors (at least via this mode).

Disclaimer:  the above are the personal musings of the author, and do not
represent any past, present, or future position of NIST, the U.S.
government,
or anyone else who might think that they are in a position of authority. 
Lester Slaback, Jr.  [Lester.Slaback@NIST.GOV] 
NBSR Health Physics 
Center for Neutron Research 
NIST
100 Bureau Dr.  STOP 3543 
Gaithersburg, MD  20899-3543 
301 975-5810 voice
301 921-9847 fax
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