| Autor: |
C. Bauer, P. Gippner, W. Rudolph, K. Hohmuth |
| Rok vydání: |
1981 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research. 191:373-378 |
| ISSN: |
0167-5087 |
| DOI: |
10.1016/0029-554x(81)91031-4 |
| Popis: |
The 12 C(p , γ) 13 N reaction near the 457 keV, Γ = 36 keV resonance was used to investigate simultaneously carbon layers on the surface and at the interfaces of solids. The large resonance width and depth dependent proton energy within a thick target lead to the emission of γ-ray quanta whose energies are also depth dependent. Using a large volume Ge(Li) detector clearly separated γ-ray peaks corresponding to the carbon layers at different depths were obtained. The shape of the cross section in the vicinity of the 457 keV resonance was calculated by means of the one-level formula of R-matrix theory. Using this calculated resonance shape and a thin carbon target as a reference standard, counts were converted to absolute quantities of carbon atoms per cm2. Our results show that this reaction can be applied to determine carbon depth profiles by a single measurement without change of incident energy. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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