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RE: Y-90

To: radsafe@list.vanderbilt.edu
Subject: RE: Y-90
From: "Brian Keele" <bdkeele@HOTMAIL.COM>
Date: Thu, 14 Feb 2002 08:49:22 -0800
Reply-To: "Brian Keele" <bdkeele@HOTMAIL.COM>
Sender: owner-radsafe@list.vanderbilt.edu

Jack,

Sr-90 decays by a pure beta emission to Y-90 at the ground state which decays by a pure beta emission with a 64 hour half-life. I can assure you that from analyzing numerous of multi-curie samples which contain Sr-90, there are no detectable gamma-rays emitted, other than from bremmstrahlung.

Y-90m is produced by irradiation of stable Y, which is comprised of Y-89. Y-90m has a few easily detectable gamma-rays and has a half-life of 3.19 hours. I can also assure you that the gamma-rays of Y-90m are readily detectable.

Brian Keele.

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