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- Organization: Chemistry, Carnegie Mellon, Pittsburgh, PA
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- Newsgroups: sci.chem
- Message-ID: <wfN4OFG00Uh7E6dIgo@andrew.cmu.edu>
- Date: Mon, 25 Jan 1993 14:59:13 -0500
- From: Paul Karol <pk03+@andrew.cmu.edu>
- Subject: Re: Technetium
- In-Reply-To: <1993Jan21.155538.19630@husc15.harvard.edu>
- Lines: 16
-
- Eric Blom writes...
-
- >The most stable isotope of Technetium has 43 protons and 55 neutrons, neither
- >of which complete shells, and neither of which pair spins. Adding and
- >subtracting neutrons puts Technetium father above or below the belt of
- >stability. Technetium was doomed, therefore, to eternal radioactivity.
-
- Then what would you predict for a system with 73 protons and 107
- neutrons? (Half-life > 10^13 years is observed.)
-
- Incidentally, all this chatter about Tc-steel is probably based on the
- use of Tc-99m, an abundant long-lived fission product.
-
- Paul J. Karol
- Nuclear Chemist
-
-