These observations suggest that neutrons and protons

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Unformatted text preview: observations suggest that neutrons and protons form into groups or shells, analogous to electron shells, which become closed when Z or N reaches a magic number. 64 Atomic/Nuclear Models C hap . 3 are commonly called magic numbers. Other nuclear properties are also found to change a bruptl y when N or Z becomes magic. For example, 1 gO , 2 oCa , 1 5oSn. ^Pb, and several other isotopes w it h magic TV or Z are observed to have abnormally high natural abundances. Similarly, the readiness with which a n eutron is absorbed by a nucleus with a magic number of neutrons is much less t ha n for isotopes w it h one more or one less n eutron . These obse...
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This note was uploaded on 01/22/2014 for the course NUC E 301 taught by Professor Kim,seungjin during the Fall '08 term at Pennsylvania State University, University Park.

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