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- From: mtymp15@staff.tc.umn.edu (David Hutton)
- Subject: Re: Mary Jane, Tobacco, & cigarettes (was FUCK NICOTINE)
- Message-ID: <mtymp15.727907204@staff.tc.umn.edu>
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- Organization: University of Minnesota
- References: <1jcc8kINNn7u@titan.ucs.umass.edu> <1993Jan24.143415.6349@news.cs.indiana.edu>
- Distribution: usa
- Date: Sun, 24 Jan 1993 20:26:44 GMT
- Lines: 30
-
- In <1993Jan24.143415.6349@news.cs.indiana.edu> "Paul Hager" <hagerp@cs.indiana.edu> writes:
-
- >A quibble -- the stated half-life of Po210 in the article was
- >just over 20 years. According to "Chart of the Nuclides" published
- >by Knolls Atomic Power Laboratory, the half-life of Po210 is
- >138.38 days. I should also point out the Po210 throws out so
- >many alphas that Polonium metal samples are bathed in the blue
- >glow of Cerenkov radiation even when sitting in ambient air.
- >Po210 is in the last part of the decay chain from U238 that ends
- >with: Pb210 -> beta -> Bi210 -> beta -> Po210 -> alpha -> Pb206.
-
- polonium:
-
- A rare radioactive metallic element of group VIA of the periodic table; a.n.
- 84; r.a.m. 210; r.d. 9.32; m.p. 254! C; b.p. 962! C. The element occurs in
- uranium ores to an extent of about 100 micrograms per 1000 kilograms. It has
- over 30 isotopes, more than any other element. The longest-lived isotope is
- polonium-209 (half-life 102 years). Polonium has attracted attention as a
- possible heat source for spacecraft as the energy released as it decays is
- 1.4 x 10^5 J kg^-1 s^-1. It was discovered by Marie Curie in 1898 in a sample
- of pitchblende,
-
- [from: A Concise Dictionary of Chemistry, Oxford Paperback Reference, c.1990]
-
-
- --
- The movement of the Tao consists in Returning. =-=-=-=-=-=-=-=-=-=-=-=-=-
- The use of the Tao consists in softness. -mtymp15@staff.tc.umn.edu-
- All things under heaven are born of the corporeal; =-=-=-=-=-=-=-=-=-=-=-=-=-
- The corporeal is born of the Incorporeal.
-