The probabilities of finding the muon in various states in synthetic single crystal and polycrystalline diamond were studied. In the IIa-type single-crystal sample at 150 K the contributions of the diamagnetic muon, `normal', and `anomalous' muonium were observed to be 1.5 %, 57 % and 8.1 %, respectively. The missing fraction of muon polarization was 33.4 %, which is approximately two times smaller than in the Ia-type natural diamond, and two or three times greater than in the IIa- and IIb-type natural diamonds. The muon spin relaxation rates at the `normal' and `anomalous' muonium states in the synthetic and natural samples of IIa- and IIb-type are similar.
@article{arxiv.1005.3898,
title = {Behaviour of muonium in synthetic diamond},
author = {T. N. Mamedov and V. D. Blank and V. N. Gorelkin and K. I. Gritsaj and M. S. Kuznetsov and S. A. Nosukhin and V. G. Ralchenko and A. V. Stoykov and R. Scheuermann and S. A. Terentiev},
journal= {arXiv preprint arXiv:1005.3898},
year = {2015}
}