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The origin of heavy elements in the solar system

The origin of heavy elements in the solar system. Location of peaks indicates n-capture along valley of stability ? s-process. s-only isotopes are above p-process level ? s-process. (Pagel, Fig 6.8). each process contribution is a mix of many events !. The sites of the s-process.

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the s-process

80 Br, t 1/2 =17 min, 92 % ( b - ) , 8 % ( b + ). p-p r ocess. proton number. 85 Kr, t 1/2 =11 a. 79 Se, t 1/2 =65 ka. r-process. 64 Cu, t 1/2 =12 h, 40 % ( b - ) , 60 % ( b + ). 63 Ni, t 1/2 =100 a. neutron number. s-only. (from Rene Reifarth). the s-process. Zr. Y. Sr. (n, g ).

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The origin of heavy elements in the solar system

the s-process