Sealed radioactive sources

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EXERTUS® CIRCA / RID-SE4P Source Holder
&
EXERTUS® CIRCA / RID-SE4P TIP 65cmm

Selenium 75 (Se-75)




 

The successful use of gamma radiography depends on the ability to provide sufficient radiation to penetrate the weld and produce an image of acceptable resolution and contrast on the processed radiographic film.


Isotopes with low gamma energies don’t give a good quality due to the inability to penetrate the object being imaged but well Se-75 which Gamma Spectrum is from 66 keV to 401 keV, with two lines of high intensity at 136 keV and 265 keV.
The resultant average energy of 217 keV is lower than the 353 keV for Ir-192. This means that the Se-75 give better image quality compare to Ir-192 due to less energy.

Double Capsule containing the isotope as pressed selenium powder. The capsules are tested to comply with Special Form Certification, also fully accredited by the IAEA.


1

Reloading per year with a source of 100 Ci

55

Dose rate in μSv/hr/GBq at 1 meter

119,8

Se-75 Half-life in days

217

Gamma spectrum in keV


Se-75 Capsule type

SR-17 Capsule

SR-18 Capsule

GS-M11 Capsule

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GS-M12 Capsule