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Abstract:
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This work is aimed at the understanding of the dynamical behavior of hydrogen
in diamond. The investigation was carried out using Transverse Field muon Spin
Rotation (TF-SR) and the Longitudinal Field muon Spin Relaxation (LF-SR)
techniques. The chemical analogy between hydrogen (p+e-) and muonium (u+e-)
enabled the study of the indirect dynamical behavior of hydrogen in diamond.
The TF-SR and LF-SR measurements were carried out in an isotopically pure 13C
diamond in the temperature ranges 11 mK - 320 K and 10 K - 400 K, respectively.
In the TF-SR results, the Prompt Absolute Fraction (PAF) of both diamagnetic
and the paramagnetic states are temperature independent. The spin
relaxation rate for the state is non-zero and temperature independent,
while that of the Mux state is non-zero and temperature dependent. The
behavior of indicates that the u+d is immobile, while that of MuT indicates the
mobility in diamond. The LF-SR results provide hop rate and associated nuclear
hyperfine interaction parameters of the Mut state in diamond. |
