Tbqen - Panasonic PT-DZ12000U Operating Instructions Manual

6CEN
The
exposure rate in R/hr at one foot for x-ray and gam m a
radiation point sources with energies between 60 KeV
and 2 MeV.
R/hr at 1 foot
where; C =
E = photon energy in MeV
N = abundance of that photon expressed as a
decim al
exam ple:
Change the % to decim als for the equation.
W e need to sum the photon energy tim es their
abundances.
R/hr at 1 foot (~30 cm ) = 6 x 5 x (0.296x0.29 +
0.308x0.2968 + 0.317x0.8285 + 0.468x0.481)
R/hr at 1 foot (~30 cm ) = 30x(0.0858 + 0.0914 + 0.2626
+ 0.2251)
R/hr at 1 foot (~30 cm ) = 30 x 0.6649 = 19.9 R/hr
6CEN and 1.6TBqEN
equation can be used to calculate the
curies of radioactive m aterial
A 5 Curie Ir-192 source which has gam m a
energies and abundances of 0.296 MeV at
29%, 0.308 MeV at 29.68%, 0.317 MeV at
82.85%, and 0.468 MeV at 48.1%.
= 6CEN
64