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Homework I - Ci to Bq and CPM to DPM

  1. Find the right decimal value

    1. 8.1 x 105 :Ci = _____ Ci

    2. 2.9 x 10-7 mCi _____ pCi

    3. 1.1 x 104 Ci = _____ :Ci

    4. 95 Ci to _____ nCi

    5. 71.5 mCi = _____ :Ci

    6. 54 MBq = _____ Bq

    7. 5 GBq = _____ MBq

    8. 5.2 x 102 MBq = _____ kBq

  2. A well counter collects counts for one minute and has a reading of 125695. If the efficiency of the well counter is 78% then what is the DPM value?



  3. A Co57 source (270 day T1/2) was calibrated on 5/18/06 with 0.87 :Ci. On 7/25/07. The source was placed in a well counter and it contained 510609 cpm. What is the well counter's efficiency?






  4. Convert Bq to Ci and Ci to Bq :

    1. 25 mCi = _____MBq

    2. 10 Ci = _____GBq

    3. 2.7 Ci = _____TBq

    4. 1.5 Ci = _____GBq

    5. 188.7 MBq = _____mCi

    6. 7400 kBq = _____ :Ci

    7. 7400 kBq = _____ mCi

    8. 555 GBq = _____ Ci

  5. Grays, Rads, Sievert, R, Rem

    1. 1.0 mR = _____ R

    2. 14.3 mSv = _____ mREM

    3. 95 Gy = _____ Rad

    4. 24.5 mRad = _____ Gy

    5. 41.5 x 104 Rem = _____ mSv

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