| Autor: |
B.-G. Pettersson, J.H. Hamilton, W.L. Croft |
| Rok vydání: |
1965 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods. 32:93-106 |
| ISSN: |
0029-554X |
| DOI: |
10.1016/0029-554x(65)90480-5 |
| Popis: |
A magnetic lens spectrometer has been adapted for electron-gamma and electron-electron directional correlation measurements. One electron channel has magnetic momentum selection provided by a medium short magnetic lens spectrometer. The lens spectrometer is iron-free with the exception of two steel end plates which decouple the already weak magnetic field in the lens from the electron detector and from the movable gamma or electron detector. The source sits outside the magnetic field and is accessable through 180° to a movable detector. Directional correlations of electrons with gamma-rays or electrons have been carried out by using a NaI(Tl) detector or an anthracene scintillation detector, respectively. A special source holder was designed for the electron-electron work. Electron energies down to 20 keV have been measured in the lens. A proportional counter may be used to lower energies. The maximum lens energy is ≈ 5 MeV. The spectrometer mean emission angle was chosen to be 13.5°. The resolution can then be varied from 1 to 5 per cent with a corresponding transmission of 0.4 to 1.5 per cent. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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