What is a "count" of radiation



G-M survey meter
Source: Steve Sugarman, REAC/TS
  • Radiation energy detected by some devices is registered as a "count."
  • Devices detect only a percent of the total energy (radioactive decays or disintegrations) released by radioactive material.
    • Efficiency: the percentage of the total radiation energy released that is detected by a device
  • Appropriate "efficiency" conversion factors can be used to
    • Determine the actual number of disintegrations per second or minute (DPS or DPM)
    • Actual disintegrations per unit of time are measured in units of curies or becquerels
  • Example
    • [CPM] divided by [efficiency] equals DPM
    • Example: 100 CPM at 20% efficiency = 100/0.2 = 500 DPM

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

Popular Posts

  • Tbilisi- Georgia world tour
    The climate in Tbilisi ranges from humid and subtropical to mild and continental, although the evenings can be chilly throughout the year. I...
  • Robotic Surgery for Prostate Cancer
    Dr. Michael Stifelman provides an overview of  robotic surgery for prostate cancer  in this video interview. Robotic Surgery for Prostat...
  • Trek to kingdom in Bhutan
    The hermetic kingdom of Bhutan, which has a population of just 700,000, is regarded with reverence by discerning travellers in search of spi...
  • KIDNEY STONE TREATMENT
    Treatment of a kidney stone that is causing obstruction depends upon the size and location of the stone, as well as your pain and ability ...
  • The Procedure Lumbar Puncture / Spinal Tap
    An LP takes about 30 minutes. The doctor carefully inserts a thin needle below the spinal cord — between the bones of the lower spine (verte...
  • Famagusta Venetian Walls-North Cyprus
    The original plan of the town was laid out by the Lusignans,  but when the Venetians took over in 1489 they completely renovated the enclosi...
  • Prague Castle Gardens
    Prague Castle Gardens Gardens were founded in 1534. Nice view of Prague Castle, quiet place for refresh. There are these gardens: The Royal ...
  • Repayment structure : Mortgage types
    Table loan This is the most common type of home loan. You can choose a term up to 30 years with most lenders. Most of your early repayments ...
  • What are some of the potential uses of cardiac MRI?
    Once certain limitations are overcome - and that day seems to be rapidly approaching - the uses of cardiac MRI will greatly increase. M...
  • Avoiding Exposure in Pregnancy
    No law or professional standard requires that radiologists determine in advance whether a patient of childbearing-age is pregnant [1]. Howe...