An Optimized Design of Single-Channel Beta-Gamma Coincidence Phoswich Detector by Geant4 Monte Carlo Simulations

Table 1

The coincidence detection efficiencies (𝜀_𝛽𝛾) of the different X-rays and gamma rays of xenon radioisotopes by Geant4 modeling.

Radioxenon	ROI limits, keV			𝜀𝛽𝛾, %
	𝑦-axis (CsI)	𝑥-axis (BC404)	ROI index
^133Xe	17.47–42.59	0–347.50	1	89.6 (87.2)
	67.80–98.73	0–396.50	2	72.5 (68.5)
	17.47–42.59	16.25–89.55	3	33.0 (32.6)
	17.47–42.59	239.03–396.504	4	8.8 (8.0)
	17.47–42.59	170.07–396.505	5	24.6 (22.9)
	17.47–42.59	16.25–161.90	6	60.2 (58.4)
^131mXe	17.47–42.59	96.99–161.90	7	78.0 (74.9)
^133mXe	17.47–42.59	170.07–239.03	8	69.6 (65.3)
^135Xe	226.58–275.47	0–908.0	9	72.9 (63.8)

Data in brackets is simulated with original PW5.