Abstract
A new method for a 4-stage depth of interaction (DOI) detector was proposed. The 4-stage DOI detector is constructed with two kinds of Gd2SiO5:Ce (GSO) crystals doped with different amount Ce, 0.5mol% and 1.5mol%. The amount of Ce in GSO determines the scintillation decay time constant and it is 60ns for the 0.5mol% GSO and 35ns for 1.5mol% GSO. This difference led to introduce pulse shape discrimination, which would distinguish between two kinds event data from respective GSOs and sort them into two groups. By independently applying Anger-type position arithmetic to the data of each group, two 2-dimensional histograms are obtained. The crystal of interaction can be identified on these histograms in which only 0.5% or 1.5mol% GSO crystal elements are expressed. To evaluate this method, we constructed the 4-stage DOI detector by alternately stacking 1.5mol% GSO crystal stages and 0.5mol% stages. The result of 137Cs gamma ray beam scanning measurement proved that the DOI detector had enough accuracy in crystal identification.
Original language | English |
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Pages | 1099-1103 |
Number of pages | 5 |
Publication status | Published - 2001 |
Externally published | Yes |
Event | 2001 IEEE Nuclear Science Symposium Conference Record - San Diege, CA, United States Duration: 2001 Nov 4 → 2001 Nov 10 |
Conference
Conference | 2001 IEEE Nuclear Science Symposium Conference Record |
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Country/Territory | United States |
City | San Diege, CA |
Period | 01/11/4 → 01/11/10 |
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging