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Thread: Antimatter and matter

  1. #1 Antimatter and matter 
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    When matter and antimatter combine they release a lot of energy. So is this energy released in proportion with Einsteins relativity E=mc^2??
    And also when matter is there along with antimatter they cannot be stopped from releasing energy combining together.Then how do scientists preserve antimatter??


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  3. #2 Re: Antimatter and matter 
    Moderator Moderator Dishmaster's Avatar
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    Quote Originally Posted by kakarot
    When matter and antimatter combine they release a lot of energy. So is this energy released in proportion with Einsteins relativity E=mc^2??
    And also when matter is there along with antimatter they cannot be stopped from releasing energy combining together.Then how do scientists preserve antimatter??
    Yes, that's correct. The process is called pair annihilation (see: http://physics.pdx.edu/~egertonr/ph311-12/pair-p&a.htm and http://en.wikipedia.org/wiki/Electro...n_annihilation). Antimatter can be stored by magnetic confinement, if the antimatter is electrically charged.


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  4. #3  
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    Thanx a lot Dishmaster. This is a swell piece of information.
    And also I want to ask how is antimatter used in PET scanning??
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  5. #4  
    Moderator Moderator Janus's Avatar
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    Quote Originally Posted by kakarot
    And also I want to ask how is antimatter used in PET scanning??
    They use a radioactive tracer. The particular element decays by positron emission (where a proton decays to a neutron and positron). The emitted positron reacts with an electron and produces a pair of gamma rays, which are detected by the equipment and used to form the image.
    "Men are apt to mistake the strength of their feelings for the strength of their argument.
    The heated mind resents the chill touch & relentless scrutiny of logic"-W.E. Gladstone


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