Re: Thorium X-Rays from U-238

["Dr. Peter Hill" <p.hill@fz-juelich.de>]

Decay of nuclear levels by internal conversion (e.g. 2+ ->0+ transition of the ground state rotational band in Th-234 : 50 keV). Transition energy not sufficient to ionize K shell electrons.



Peter 



At 19:08 21.10.04, Peter.Vernig@MED.VA.GOV wrote:

>Can anybody tell me why the list of radiation from U-238 says "Th L X-Rays"

>instead of just "Th X-Rays".  This is from the old [1970] Rad Health

>handbook.  I don't see why both K and L shell electrons should not be self

>ionized by alpha particles.  I looked through the isotopes of U and it seems

>many of the even mass number isotopes say "Th L X-Rays" if they are alpha

>emitters and many of the odd mass numbered isotopes say "Th X-Rays".

>

>Any opinions in this e-mail are solely those of the author, and are not

>represented as those of the VA Eastern Colorado HCS, the Dept. of Veterans

>Affairs, or the US Government.

>

>Peter G. Vernig, Radiation Safety Officer, VA Eastern Colorado Health Care

>System, 1055 Clermont St. Denver, CO 80220, peter.vernig@med.va.gov, Phone=

>303.399.8020 x2447; Fax = 303.393.5026, alternate fax, 303.393.5248

>

>"...whatever is true, whatever is noble, whatever is lovely, whatever is

>admirable, if anything is found to be excellent or praiseworthy, let your

>mind dwell on these things."

>

>Paul of Tarsus

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============================

Dr. Peter Hill

Forschungszentrum Jülich GmbH

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