Science: v.1-v.219Moses King, 1967 |
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Page 1238
... lead has been used to analyze certain works of art . The basis of the method is the detection of radioactive lead - 210 , which decays with a 22 - year half - life when it is unsupported by its long - lived precursor , radium - 226 ...
... lead has been used to analyze certain works of art . The basis of the method is the detection of radioactive lead - 210 , which decays with a 22 - year half - life when it is unsupported by its long - lived precursor , radium - 226 ...
Page 1239
... lead have been removed ( used later for a gravimetric lead analysis ) and the radium - bearing solution has been purified , radium is eventually car- ried on a minute precipitate of BaSO4 ( ~ 0.1 mg of barium ) which is mounted on a ...
... lead have been removed ( used later for a gravimetric lead analysis ) and the radium - bearing solution has been purified , radium is eventually car- ried on a minute precipitate of BaSO4 ( ~ 0.1 mg of barium ) which is mounted on a ...
Page 1240
... lead - 210 con- centrations , from essentially zero to nearly 200 disintegrations per minute per gram of lead , precludes one use of Eq . 1 , wherein one must assume that the original uranium concentra- tions in lead ores are reasonably ...
... lead - 210 con- centrations , from essentially zero to nearly 200 disintegrations per minute per gram of lead , precludes one use of Eq . 1 , wherein one must assume that the original uranium concentra- tions in lead ores are reasonably ...
Contents
Vol 155 No 3765 | 951 |
International Biological Program | 957 |
E M Williams | 974 |
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