NRA

Features of NRA

• Selective detection of light elements
• Isotope sensitive
• Tracer element distributions

Non - destructive quantitative hydrogen analysis

The nuclear reaction ¹⁵N + ¹H → ¹²C + ⁴He + γ , which exhibits a narrow resonance at an incident ¹⁵N energy, is used for Resonant Nuclear Reaction Analysis (RNRA). Standard-free hydrogen depth profiling is obtained by „moving“ the narrow resonance into depth at increasing incident energy, and detecting the emitted γ rays.

Properties

• typical incidence particle: ¹⁵N, 6.3 to 12 MeV
• beam spot: 1 - 100 mm²
• detection limit: 0.02 at%
• analysing depth: up to 5 μm (depends on the material)
• X-ray mirrors
• depth resolution: about 8 nm (Si), min. 1 nm (grazing incidence)
• sample: possibility of heating or cooling