Project supported by the National Natural Science Foundation of China(Grant Nos.11175171 and 11105139)
For the proper interpretation of the experimental data produced in slow positron beam technique, the positron implantation properties are studied carefully using the latest Geant4 code. The simulated backscattering co...
Project supported by the National Natural Science Foundation of China(Grant Nos.11175171 and 11105139)
We make a gradient correction to a new local density approximation form of positron-electron correlation. The positron lifetimes and affinities are then probed by using these two approximation forms based on three ele...
Supported by the National Natural Science Foundation of China(Nos.11175171,10835006,11105139 and 10975133)
A digital three-detector positron lifetime spectrometer was developed.It consists of a DRS4 waveform digitizing board and three La Br3scintillation detectors coupled to XP2020Q photomultiplier tubes.DRS4 waveform digi...
Supported by National Natural Science Foundation of China(11175171,10835006,11105139,10975133)
A new simple digital positron lifetime spectrometer has been developed. It includes a DRS4 waveform digitizing board and two scintillation detectors based on the XP2020Q photomultiplier tubes and LaBr3 scintillators. ...