X-ray detector, Al window 32mm x 2.5mm

Scintillation Probe Type 44A  ,
The sodium iodide crystal (32 mm dia by 2.5mm thick) is mounted on the front surface of the probe to facilitate monitoring of large contaminated areas. It is suitable for a range of energies from approximately 15keV to 250keV. It is also beta sensitive for energies above 500keV.

Diameter  ,50mm  ,Length  ,180mm. Aluminum window weight 14mg cm^-2.
Sensitivity  ,3.8, 1.6 & , 1.4 counts s^-1  ,for 1Bq cm^-2  ,(2.7 x 10-⁵uCi cm^-2) of  ,¹²⁵I,^99mTc,  ,⁵⁷Co respectively.
Background  ,4-8 counts s^-1  ,depending on locale