Résumé
A magnetically guided slow positron beam with variable energy up to 50 keV has been built in the positron laboratory of CERI (Orléans). The accelerator is coupled with a Doppler broadening spectrometer. A 4μm polycrystalline W foil is used to moderate the positrons. The speed selection of positrons is performed with a 90° elbow. An activity of about 6 μCi was measured on the sample holder with a conventional 60 mCi 22Na positron source of 6 mm in diameter. We measured the electron momentum distributions in the first micron of heavy ions (Pb, Ar) implanted n-type Ge. Different ion fluences are compared.
| langue originale | Anglais |
|---|---|
| Pages (de - à) | 523-525 |
| Nombre de pages | 3 |
| journal | Materials Science Forum |
| Volume | 363-365 |
| Les DOIs | |
| état | Publié - 1 janv. 2001 |
| Evénement | 12th International Conference on Positron Annihilation - Munchen, Allemagne Durée: 6 août 2000 → 12 août 2000 |
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