Combined method for detecting and positioning high energy radiation

A combined method for detecting and positioning high energy radiation, comprising the following steps:

• arranging scintillation crystals for capturing high energy radiation into a square array;
• assembling a plurality of photomultiplier tubes (PMTs) with different sizes into a combined array, wherein, the PMTs comprise 4 larger-sized PMTs and 1 smaller-sized PMT;
• the larger-sized PMTs are arranged in quadrangular symmetry;
• the smaller-sized PMT is located at center of the 4 larger-sized PMTs;
• forming a combined high energy radiation detector by directly bonding the scintillation crystal array and the combined PMT array or bonding a photoconductive material between the scintillation crystal array and the combined PMT array with an optical adhesive;
• generating scintillation light when high energy radiation is incident into the scintillation crystal array of the combined high energy radiation detector;
• amplifying the scintillation light by the combined PMT array to form electrical pulse signals;
• amplifying and decoding the electrical pulse signals;
• and obtaining position coordinates in the scintillation crystal array of the high energy radiation through a weight distribution of the electrical pulse signals in the combined PMT array;
• wherein the electrical pulse signals are decoded according to the following method:
• an X-axis direction position coordinate of the high energy radiation in the scintillation crystal array is calculated by dividing a total intensity sum of the electrical pulse signals of all the PMTs in the X-axis direction by a total intensity sum of the electrical pulse signals of all the PMTs;
• a Y-axis direction position coordinate of the high energy radiation in the scintillation crystal array is calculated by dividing a total intensity sum of the electrical pulse signals of all the PMTs in the Y-axis direction by the total intensity sum of the electrical pulse signals of all the PMTs;
• energy of the high energy radiation is calculated by adding up intensities of the electrical pulse signals of all the PMTs.