Changes

Neutrons can be created as part of Beta decay.  There are three different types of beta decay - electron emission, electron capture, and positron emission (its theoretically possible to have positron capture too, but that isn't seen in nature).  The second and third types of beta decay convert a proton into a neutron.  In a PET scan one of: Carbon 11, Nitrogen 13, Oxygen 15, or Fluorine 18 is used.  When Carbon 11 undergoes beta decay via emission of a positron it becomes Boron 11 -- a proton has become a neutron. In situations where the atom is not energetic enough to emit a proton, you can have electron capture  such as Aluminum 26 becoming Magnesium 26. --[[User:Mtur|Mtur]] 17:26, 19 March 2007 (EDT)

Neutrons can be created as part of Beta decay.  There are three different types of beta decay - electron emission, electron capture, and positron emission (its theoretically possible to have positron capture too, but that isn't seen in nature).  The second and third types of beta decay convert a proton into a neutron.  In a PET scan one of: Carbon 11, Nitrogen 13, Oxygen 15, or Fluorine 18 is used.  When Carbon 11 undergoes beta decay via emission of a positron it becomes Boron 11 -- a proton has become a neutron. In situations where the atom is not energetic enough to emit a proton, you can have electron capture  such as Aluminum 26 becoming Magnesium 26. --[[User:Mtur|Mtur]] 17:26, 19 March 2007 (EDT)