Details
| Original language | English |
|---|---|
| Pages (from-to) | 19-27 |
| Number of pages | 9 |
| Journal | Zeitschrift für Physik B Condensed Matter and Quanta |
| Volume | 30 |
| Issue number | 1 |
| Publication status | Published - Mar 1978 |
| Externally published | Yes |
Abstract
Neutron activated20F nuclei (T1/2=11 s) in CaF2 serve for two purposes: first they produce well defined point defects by their (n, γ)-production mechanism, second, they act as probes to detect the properties of these defects in a β- and γ-ray detected nuclear magnetic resonance experiment. Below about 70 K an interstitial defect is observed due to a quadrupolar splitting of the20F-NMR line. The defect induced electric field gradient is oriented along the 〈111〉-axis of the crystal and causes a quadrupole coupling constant e2qQ/h=-2.0(1) MHz at the20F site. The defect anneals above 70 K with an Arrhenius like temperature dependence corresponding to an activation energy EM=0.17(4) eV.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Zeitschrift für Physik B Condensed Matter and Quanta, Vol. 30, No. 1, 03.1978, p. 19-27.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Structure and annealing of (n, γ)-Induced point defects in CaF2
AU - Stöckmann, H. J.
AU - Dubbers, D.
AU - Grupp, M.
AU - Grupp, H.
AU - Ackermann, H.
AU - Heitjans, P.
PY - 1978/3
Y1 - 1978/3
N2 - Neutron activated20F nuclei (T1/2=11 s) in CaF2 serve for two purposes: first they produce well defined point defects by their (n, γ)-production mechanism, second, they act as probes to detect the properties of these defects in a β- and γ-ray detected nuclear magnetic resonance experiment. Below about 70 K an interstitial defect is observed due to a quadrupolar splitting of the20F-NMR line. The defect induced electric field gradient is oriented along the 〈111〉-axis of the crystal and causes a quadrupole coupling constant e2qQ/h=-2.0(1) MHz at the20F site. The defect anneals above 70 K with an Arrhenius like temperature dependence corresponding to an activation energy EM=0.17(4) eV.
AB - Neutron activated20F nuclei (T1/2=11 s) in CaF2 serve for two purposes: first they produce well defined point defects by their (n, γ)-production mechanism, second, they act as probes to detect the properties of these defects in a β- and γ-ray detected nuclear magnetic resonance experiment. Below about 70 K an interstitial defect is observed due to a quadrupolar splitting of the20F-NMR line. The defect induced electric field gradient is oriented along the 〈111〉-axis of the crystal and causes a quadrupole coupling constant e2qQ/h=-2.0(1) MHz at the20F site. The defect anneals above 70 K with an Arrhenius like temperature dependence corresponding to an activation energy EM=0.17(4) eV.
UR - http://www.scopus.com/inward/record.url?scp=33750301265&partnerID=8YFLogxK
U2 - 10.1007/BF01323665
DO - 10.1007/BF01323665
M3 - Article
AN - SCOPUS:33750301265
VL - 30
SP - 19
EP - 27
JO - Zeitschrift für Physik B Condensed Matter and Quanta
JF - Zeitschrift für Physik B Condensed Matter and Quanta
SN - 0340-224X
IS - 1
ER -