Longitudinal field muon spin relaxation measurement and evidence for a new muonium defect site in type Ia diamond

Hyperfine Interactions 120/121, 579-583 (1999)

Longitudinal field muon spin relaxation (LF-µSR) measurements and evidence for a new muonium defect site in type Ia diamond

J.M. Baker^a
I.Z. Machi^b
S.H. Connell^b
K. Bharuth-Ram^c
J.E. Butler^d
S.F.J. Cox^e
C.G. Fischer^b
T. Jestadt^a
P. Murphy^a
R.W.N. Nilen^b
J.P.F. Sellschop^b

^aPhysics Department, Clarendon Laboratory, Parks Road, Oxford, OX13PU, UK

^bSRCNS, University of the Witwatersrand, PO Wits, Johannesburg 2050, South Africa

^cPhysics Department, University of Durban-Westville, Durban 4000, South Africa

^dNaval Research Laboratory, Washington, DC, USA

^eISIS Facility, Rutherford Appleton Laboratory, Didcot, Oxon OX11 0QX, UK

A new configuration for muonium, with hyperfine interaction parameters of less than axial symmetry, in nitrogen rich diamond is identified in Longitudinal Field Muon Spin Relaxation (LF-µSR) measurements. The TF-µSR measurements on the same sample show that almost the entire strength of the new configuration is accounted for by a ``missing fraction'', typically seen in nitrogen rich type Ia diamond. The ``missing fraction'' is therefore the result of a T2 relaxation. This is consistent with muon trapping at or in some nitrogen related defect(s) followed by electron capture at random times.

Link to the Hyperfine Interaction abstract

Thomas Jestädt, 1999. Back to publications.