期刊
出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2003.06.001
关键词
coincidence Doppler spectroscopy; positron annihilation; defect identification
We present a simple, high-performance, high-resolution, two-dimensional Doppler broadening spectrometer for positron annihilation experiments. We used a combination of two germanium detectors and a Digital Signal Processor unit as photon detection system. The coincidence circuit and data acquisition circuit are provided by a home-built system. We have investigated the background contributions, resolution and stability. (C) 2003 Elsevier B.V. All rights reserved.
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