BULK: Re: [ RadSafe ] Can tritium produce bremsstrahlung?

[John R Johnson]

Tom et al

Yes, what you're missing is that the photon energy is as high as the
electron energy. That's what I was pointing out in my post yesterday and why
we were able to measure C-14, Pm-147, etc  in workers lungs. See below

John

8. 	MEASUREMENT OF 147Pm IN VIVO USING PHOSWICH DETECTORS
	J.R. Johnson
	AECL-5854 (1977).

9. 	WHOLE BODY RETENTION FOLLOWING AN INTRAVENOUS INJECTION OF 75Se AS
	SELENOMETHIONINE
	J.R. Johnson
	AECL-5868, Health Physics 33, (1977) 250-251.

69.	THE MEASUREMENT OF LOW ENERGY BETA PARTICLE EMITTING RADIONUCLIDES IN
THE LUNG USING 	PHOSWICH DETECTORS
	J. R. Johnson, E. S. Lamothe, and G. H. Kramer
	Radiation Protection Dosimetry, Vol. 20, No. 4 (1987) 267-269.

80.	LUNG RETENTION AND CLEARANCE CLASSIFICATION OF A 14C-CONTAINING AEROSOL
PRODUCED DURING RE-	TUBING OF A NUCLEAR REACTOR
	J. R. Johnson
	Health Physics, Vol. 57, Number 4 (October 1989) 645-647.

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl]On
Behalf Of Tom Harrison
Sent: February 22, 2006 1:07 PM
To: brees at lanl.gov; stiegli1 at msu.edu; radsafe at radlab.nl
Subject: BULK: Re: [ RadSafe ] Can tritium produce bremsstrahlung?




wait a minute Gang... I may be very wrong as many times I am, but  the
peak internsity energy for spectral  beta emitters like H-3 is not the
18.6 kev end point energy , but rather the 18.6/3 peak energy for the
betas, or about 6 kev..... then you gott'a  convolute the bremmstrahlung
energy spectrum onto this peak meaning that in the final analysis you'd
be looking for 1-2 kev X-rays peak, which is less than the
bremmstrahlung
X-rays you would get off an X-ray tube ... unless the H-3 source is
well into the curie(excuse the oldie but goodie  units)  activity range,
the chances of detecting 1-2 kev X-rays with any probe are probably
pretty remote..... am I missing something here ???

Tom Harrison, Ph.D.
University of North Texas
Denton, TX
HarrisoT at adaf.admin.unt.edu




Thomas G. Harrison, Ph.D.
Radiation Safety Officer
Room 245 ESaT Bldg
UNT
tel:      (940)565-3282
page:  (817)824-9349






>>> Brian Rees <brees at lanl.gov> 2/21/2006 4:03 PM >>>
Oh rats, my favorite source of winning beer will be gone.  Most folks
will
bet that you can't, but go find a tritium exit sign.  Any time you get

10^11 or 10^12 things occurring every second even low probability
things
happen.  It's not a stupid question at all, just go try it.

Brian Rees



At 12:04 PM 2/21/2006, Jon Stieglitz wrote:
>Could someone please tell me if a beta pancake is able to detect
tritium in
>any amounts?  I have heard from reputable sources that it can.
Obviously
>the beta is too weak to be detected so as I understand it, the only
way
>would be to detect the bremsstrahlung radiation.  Is tritium
energetic
>enough to produce bremsstrahlung?  Can anyone tell me how much would
be
>needed?  I apologize if this is a stupid question but nobody has
totally
>answered the question to my satisfaction.
>
>
>
>
>
>J. Stieglitz
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