Activity Calculation; Raysafe View - Fluke Biomedical RAYSAFE 452 Manual Del Usuario

Activity calculation

The approximate activity of detected nuclides can be calculated
from count rate, see Table 4 on page 12. For non-listed nuclides,
interpolate using the decay type and particle energy.
DECAY
RADIONUCLIDE
(E , MeV)
max
14 C β − (0.16)
Co β (0.32)
60 −
36 Cl β − (0.71)
Sr / Y β (0.55 / 2.28)
90 90 −
239 Pu α (5.16)
Am α (5.49)
241
Table 4. Conversion factors from count rate to activity.
Table 4 on page 12 is based on measurements made with 3 mm
distance between the instrument housing (without lid) and an Al plate
with a thin layer of radionuclide (wide area class 2 source according
to ISO 8769:2010). Under other measurement conditions, for example
different physical properties of the sample, such as thickness, size and
purity, these conversion factors may underestimate the activity.
Example: The instrument reads 20 cps (1200 cpm) above background
at a short distance from an Americium-241 containing particle. The
activity of the particle is at least 20 cps × 8 Bq/cps = 160 Bq (1200 cpm
× 8 dpm/cpm = 9600 dpm).
RaySafe 452 – Users Manual (EN)

RAYSAFE VIEW

TYPICAL ACTIVITY
PER COUNT RATE
(Bq/cps), (dpm/cpm)
17
6
4
3
8
Figure 10.
8
Use the USB cable provided with the instrument to connect to a
computer running RaySafe View.
RaySafe View includes:
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Download RaySafe View from www.flukebiomedical.com.
12
Connect instrument to RaySafe View.
Real-time display of readings.
Remote control of the instrument (change settings, store
measurements).
Import of measurements stored in the instrument.
Data analysis of rate log in waveform.
Possibility to save measurements on the computer.
Data export to Microsoft Excel and to csv files.