A magnetic lens spectrometer for electron-gamma and electron-electron directional correlation measurements
作者： W.L. Croft , B.-G. Pettersson , J.H. Hamilton
DOI: 10.1016/0029-554X(65)90480-5
关键词: Physics 、 Electron 、 Lens (optics) 、 Particle detector 、 Detector 、 Magnetic lens 、 Spectrometer 、 Electron spectrometer 、 Proportional counter 、 Optics
摘要: Abstract A magnetic lens spectrometer has been adapted for electron-gamma and electron-electron directional correlation measurements. One electron channel momentum selection provided by a medium short spectrometer. The is iron-free with the exception of two steel end plates which decouple already weak field in from detector movable gamma or detector. source sits outside accessable through 180° to Directional correlations electrons gamma-rays have carried out using NaI(Tl) an anthracene scintillation detector, respectively. special holder was designed work. Electron energies down 20 keV measured lens. proportional counter may be used lower energies. maximum energy ≈ 5 MeV. mean emission angle chosen 13.5°. resolution can then varied 1 per cent corresponding transmission 0.4 1.5 cent.
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