THIS IS A READ-ONLY ARCHIVE FROM THE SORABJI.COM MESSAGE BOARDS (1995-2016). |
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I can't but need to do something about this debate that was started on the internet. Blast! > About alpha decay: he's right that it's a helium >nucleus - two protons,two neutrons, reducing the >atomic number from 115 to 113. 113 would >presumably have a much shorter half-life. A >half-life of 1000 years before entering a chain >reaction that reduces 115 very quickly to much > smaller atoms means that the half life of the >atom is only 1000 years. > When measuring the half-life of an atom, you >take the shortest decay mode,not the longest. Mr. Versailles statement is only partially true, There are many different halflives in a typical unstable nucleus. An Alpha, (+,-)Beta, Gamma, Fission. Even though one half life may be shorter than the other, it does not mean that is the absolute decay route, it has a probability of decaying through any of the other decay routes. When particles shift states within an atomic nucleus they emit energy, and change state, resulting in a new half life. An analogy to this is when an electron in orbit about a nucleus changes state, it will emit energy in the form of a photon. And I DID quote the shortest decay mode...1000 years!. instead of Retuculi 115 Alpha half-life 8.2E+52 Years!. As a result of all this you must take ALL decay probabilities into account,not just the'shortest'. When all the decay probabilities are graphed out, you end up with which is called a 'Probability Distribution'. |
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All started with an educated comment in reply to my sending the following URL to a long-time internet friend. How was I to know that they are both heavily into Physics . . . . http://www2.aros.net/~lambo/reticulium115/reticulium.htm |
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"Don't sweat it. I was hardly charitable myself. And I get much worse directly (did I ever tell you about the white supremacist who wrote to complain that the Julie Brown song "'Cause I'm A Blonde" was anti-white?), especially from people who take exception to the song Plastic Jesus. Because my lyrics are linked from the Jesus Dance site, people think I wrote that site, too, and therefore I'm totally evil. A little playful physics fencing is nothing to worry about" |
I don't even have my bachelor's degree yet, and I don't know what it has to do with synchrotron light(i.e. an electron emitting a photon when you fuck with it), but I work at a synchrotron, and I sent the link to someone who can help. |
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