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Unformatted text preview: iction of the stable isobar for A=31 based on shell model
31 Al 13 p 14 p 31 31 31 18 n 17 n 15 p 16 n 16 p 15 n Si P S As one goes from 31Al to 31Si to 31P, there is more stability (lower energy state) by converting a
neutron into a proton (β- decay). However, this is not true as you go from 31P to 31S, In fact,
S is made more stable by converting a proton into a neutron (β+ decay). Thus, 31P is
expected to be the stable nuclide for A=31....
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