ScienceJohn Michels (Journalist) 1949 |
From inside the book
Results 1-3 of 81
Page 11
... RADIATION FROM A RADIOACTIVE SAMPLE In the case of the collimated beam ( Fig . 2 ) a certain fraction of the radiation , represented by A , is trans- mitted through the absorber without scattering regard- less of the position of the ...
... RADIATION FROM A RADIOACTIVE SAMPLE In the case of the collimated beam ( Fig . 2 ) a certain fraction of the radiation , represented by A , is trans- mitted through the absorber without scattering regard- less of the position of the ...
Page 12
... radiation , and degree of collimation of the beam . Under some conditions a minimum in the counting rate may occur ... radiation at the counter window was less than the diameter of the win- Scattered Cm radiation- BI G.M. Tube Scattered ...
... radiation , and degree of collimation of the beam . Under some conditions a minimum in the counting rate may occur ... radiation at the counter window was less than the diameter of the win- Scattered Cm radiation- BI G.M. Tube Scattered ...
Page 146
... radiation were absorbed by a 2 mm - lead shield . In this way only the known penetrating y - components of the known radio- active bodies ( uranium , thorium , their decay products , and potassium ) could reach the counter . In most ...
... radiation were absorbed by a 2 mm - lead shield . In this way only the known penetrating y - components of the known radio- active bodies ( uranium , thorium , their decay products , and potassium ) could reach the counter . In most ...
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