The Relation Between the Alpha Ray Activities And Ranges of Radioactive Substanc
The Relation Between the Alpha Ray Activities And Ranges of Radioactive Substanc
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61 2O6 . O 0. 007 Mean A 72 The activity at the end of 206 days (Table VI) was found to be 0. 007; f this, o. Ooi was calculated to be due to remaining Rn and products; the balance, 0. 006, represents the constant activity of the minute amount of thorium present. The activities given in Table VI have been corrected for this constant thorium activity. The activity measurements were made in the a-ray electroscope previously described. 1 The active films were placed 6 . 5 cm. Below the charged ele...ctrode, thus allowing all rays to reach their full ranges. The activities of the films varied between one-half and one and one-half that of the standard film of uranium oxide. Sufficient potential, 500 to 600 volts, was used to insure practically complete saturation currents for the weak ionization measured.
Three other series of measurements like those represented by Table II were made with films made from two additional lots of radioactinium, 1 McCoy and Ashman, loc. Cit.
12 a-RAY ACTIVITIES each prepared and purified separately.
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To quickly assess the difficulty of the text, read a short excerpt:
61 2O6 . O 0. 007 Mean A 72 The activity at the end of 206 days (Table VI) was found to be 0. 007; f this, o. Ooi was calculated to be due to remaining Rn and products; the balance, 0. 006, represents the constant activity of the minute amount of thorium present. The activities given in Table VI have been corrected for this constant thorium activity. The activity measurements were made in the a-ray electroscope previously described. 1 The active films were placed 6 . 5 cm. Below the charged ele...ctrode, thus allowing all rays to reach their full ranges. The activities of the films varied between one-half and one and one-half that of the standard film of uranium oxide. Sufficient potential, 500 to 600 volts, was used to insure practically complete saturation currents for the weak ionization measured.
Three other series of measurements like those represented by Table II were made with films made from two additional lots of radioactinium, 1 McCoy and Ashman, loc. Cit.
12 a-RAY ACTIVITIES each prepared and purified separately.
What to read after The Relation Between the Alpha Ray Activities And Ranges of Radioactive Substanc?
You can find similar books in the "Read Also" column, or choose other free books by Edwin Daniel Leman to read onlineMoreLess
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