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textbook:nrctextbook:chapter6 [2025-04-22 10:14]
Merja Herzig
textbook:nrctextbook:chapter6 [2025-05-07 12:01] (current)
Merja Herzig
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 +{{anchor:curie_ci}}
 ### ###
 Earlier //Curie// (Ci) was used as the activity unit. One Curie is  3.7×10<sup>10</sup> decays in second and thus Earlier //Curie// (Ci) was used as the activity unit. One Curie is  3.7×10<sup>10</sup> decays in second and thus
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 +{{anchor:dps}} 
 +{{anchor:dpm}}
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 Sometimes [[textbook:nrctextbook:chapter6#activity|activities]] are expressed as a dps unit, meaning disintegrations per second which are equal to activities presented as [[textbook:nrctextbook:chapter6#becquerel|Becquerels]]. In some instances, for example in [[textbook:nrctextbook:chapter12|liquid scintillation counting]], activity is also presented as //dpm// units (disintegrations per minute). One dpm is 1/60 dps or 16.7 mBq. Sometimes [[textbook:nrctextbook:chapter6#activity|activities]] are expressed as a dps unit, meaning disintegrations per second which are equal to activities presented as [[textbook:nrctextbook:chapter6#becquerel|Becquerels]]. In some instances, for example in [[textbook:nrctextbook:chapter12|liquid scintillation counting]], activity is also presented as //dpm// units (disintegrations per minute). One dpm is 1/60 dps or 16.7 mBq.
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 {{:textbook:nrctextbook:development_of_activities_no-equilibrium_fig_6_6.png |}} {{:textbook:nrctextbook:development_of_activities_no-equilibrium_fig_6_6.png |}}
 Figure VI.6. Development of activities in case of no radioactive equilibrium, in which the half-life of the parent nuclide (<sup>218</sup>Po, t<sub>½</sub> = 3 min) is shorter than that of the daughter (<sup>214</sup>Pb, t<sub>½</sub> = 26.8 min).  Figure VI.6. Development of activities in case of no radioactive equilibrium, in which the half-life of the parent nuclide (<sup>218</sup>Po, t<sub>½</sub> = 3 min) is shorter than that of the daughter (<sup>214</sup>Pb, t<sub>½</sub> = 26.8 min). 
-Left: activity on linear scale. Right: activity on logarithmic scale. Blue: <sup>218</sup>Po . Red: <sup>214</sup>Pb.  +Left: activity on linear scale. Right: activity on logarithmic scale. Blue: <sup>218</sup>Po . Red: <sup>214</sup>Pb. 
 +  
 +{{anchor:equilibria_in_natural_decay_chains}}
 ==== 6.7.4. Equilibria in natural decay chains ==== ==== 6.7.4. Equilibria in natural decay chains ====
 {{anchor:long_lived_radionuclides}} {{anchor:long_lived_radionuclides}}
textbook/nrctextbook/chapter6.1745309656.txt.gz · Last modified: 2025-04-22 10:14 by Merja Herzig