國立臺灣大學物理系所Jan, G.J.G.J.JanO'Yang, J.Y.J.Y.O'YangTseng, P.K.P.K.TsengLiaw, H.B.H.B.LiawYoung, C.S.C.S.Young2006-09-272018-06-282006-09-272018-06-281971-10http://ntur.lib.ntu.edu.tw//handle/246246/2006092712003069599In this report we describe a new automatic angular correlation measurement method for gamma-ray pairs arising from positron annihilation. An arm of a goniometer used in the angular correlation experiment is programmed to sweep an arc of certain angle continuously. The angular displacement of the moving arm is converted to D. C. voltage and fed to ADC of a multichannel analyzer as a sampling signal. The coincidence pulses of two gamma rays serve as sampling commands and are stored in the multichannel analyzer as a function of the sampling D.C. signal, e.g., the angular displacement of the goniometer arm. The method makes one possible to set up inexpensive reliable measuremet system. With minor modification it can also be applied to other experiments.application/pdf149269 bytesapplication/pdfzh-TWjournal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/2006092712003069599/1/062.pdf