Be7 or Be-9 is produce by tertiary fission?

[Lester Slaback <Lester.Slaback@NIST.GOV>]

Been gone for a few days, and have not seen a response to the question on
tertiary fission producing Be-7 or Be-9.  I do not know the answer but I
would GUESS that the production fraction would be on the order of that for
producing tritium, e.g., 1 E-4, simply on the basis of guessing that the
production via tertiary fission of all light Z isotopes are probably
similar[except for issues like the N magic numbers, e.g., He-4].
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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