We have tried to obtain the spectrum of internal bremsstrahlung photons which are released simultaneously with beta particles and neutrinos from the ⁹⁰Sr-⁹⁰Y source in secular equilibrium. Detector parameters of the 5.08 cm × 5.08 cm NaI(Tl) detector are determined using standard calibration sources. A detector response function is generated for a single-energy gamma photon using detector parameters and Monte Carlo method. The Singular Value Decomposition (SVD) method is used for stripping of the detector response function effects from the raw experimental spectrum. The stripped experimental data are compared with KUB theory and a different stripping method that we used our former work on the same isotope. There is a much better agreement between experimental and theoretical findings comparing the former experimental data.

我们试图获得内部致辐射光子的光谱，它们与⁹⁰ Sr- ^90中的β粒子和中微子同时释放长期平衡中的Y源。使用标准校准源确定5.08 cm×5.08 cm NaI（Tl）检测器的检测器参数。使用检测器参数和蒙特卡洛方法为单能伽马光子生成检测器响应函数。奇异值分解（SVD）方法用于从原始实验光谱中剥离检测器响应函数效应。将汽提的实验数据与KUB理论以及我们以前在相同同位素上使用的另一种汽提方法进行了比较。比较以前的实验数据，实验结果和理论发现之间有更好的一致性。