[2] UNIV WITWATERSRAND, SCHONLAND RES CTR, ZA-2050 JOHANNESBURG, SOUTH AFRICA
[3] MAX PLANCK INST MET RES, INST PHYS, D-70569 STUTTGART, GERMANY
来源:
HYPERFINE INTERACTIONS
|
1997年
/
105卷
/
1-4期
关键词:
Material Research Society;
Natural Diamond;
Chemical Vapour Deposition Diamond;
Transverse Relaxation Rate;
Muonium State;
D O I:
10.1023/A:1012636312443
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
O56 [分子物理学、原子物理学];
学科分类号:
070203 ;
070304 ;
081704 ;
1406 ;
摘要:
Transverse-field mu SR spectroscopy was used to study the behaviour of positive muons implanted in polycrystalline chemical-vapour-deposited (CVD) diamond. Measurements were made at sample temperatures of 10 K, 100 K, and 300 K at a magnetic field of 7.5 mT to study the behaviour of the ''normal'' (isotropic) muonium state (Mu(T)) and the diamagnetic states (mu(d)) 10 K and 300 K at the so-called ''magic field'' of 407.25 mT to study the anomalous (bond-centred) muonium state (Mu(BC)) and mu(d). The absolute fractions of the muonium states in the CVD diamond are observed to be close to those in high-quality natural type-IIa single crystal diamond.