Re: Am-Be source

[Joel Baumbaugh <baumbaug@nosc.mil>]

	Its sort of interesting that my Sept. 1960 RHHB lists a 4.43 gamma for
C-12 (with a T 1/2 of 1.8 E -4 seconds Doppler broadening) and my Jan. 1970
RHHB does not list any gamma at all...That's progress for you...
 
	Joel Baumbaugh
	SSC-SD

At 02:48 PM 1/23/98 -0600, you wrote:
>Ninni Jacobs wrote:
>
>>Carbon-12 does not emit a gamma, unless you mean the excited state of
>>Carbon-13.
>>But I dont think there is a gamma ray associated with that reaction.
>>I think the 4.4 MeV is divided between the neutron and the recoil nucleus.
>>(see Page 123 and 124 of Cember).
>
>The alpha + beryllium reaction leaves the carbon-12 nucleus in the 2+
>excited state. The 2+ excited state of carbon is 4.44 MeV above the ground
>state of carbon-12 (for example, see the Table of the Isotopes, published
>by Wiley). This excited state of carbon-12 converts to the ground state of
>carbon-12 by emitting a 4.44-MeV gamma. Thus, all 9Be(alpha,n) sources
>(PuBe, AmBe, RaBe, etc.) are accompanied by 4.44 MeV gammas.
>
>"Shlala gashle" (Zulu greeting, meaning "Stay safe")
>mike (mcnaught@LANL.GOV)
>
>
>
>
Joel T. Baumbaugh, MPH, MHP
baumbaug@nosc.mil / baumbaug@spawar.navy.mil
Radiation Safety Officer
SSC-San Diego, CA. USA

	NOTE:	The contents of this message have not been reviewed, nor approved by
the Federal Government, the U.S. Navy, my bosses or my wife...