New progress in large-size CZT (Zn=10%) single crystal growth using MVB technique for room temperature radiation detectors

Using modified vertical Bridgman (MVB) technique, Yinnel has been successfully growing 3-inch-diameter CZT ingots with single crystal volume up to 300 cm³ per ingot. Using the "best" growth condition, Yinnel can reproducibly grow the CZT with high μτ(e) and μτ(h) products. Baltic Scientific Instruments (B.S.I.) has made six large-size (15×15×10 mm³) coplanar detectors, which showed the excellent spectrum resolution (<2%), the best resolution is 1.58%, and Brookhaven National Laboratory (BNL) has made the planar Frisch Grid detector (5×6×11 mm³) with the 1.2 % resolution (at 5°C) both detectors measured with Cs¹³⁷ at 662 keV.