Details
| Original language | English |
|---|---|
| Pages (from-to) | c6. 381-c6. 384 |
| Journal | Journal de physique. Colloque |
| Volume | 41 |
| Issue number | 7 |
| Publication status | Published - 1979 |
| Externally published | Yes |
| Event | Europhys Top Conf, 3rd, Lattice Defects in Ionic Cryst - Canterbury, Engl Duration: 17 Sept 1979 → 21 Sept 1979 |
Abstract
Single crystals of several alkaline earth fluorides were irradiated with thermal polarized neutrons at various temperatures. The neutron capture process **1**9F(n, gamma )**2**0F produces recoil displaced **2**0F ions (recoil energy: several hundred ev) and simultaneously some nearby point defects. These defects were studied by their influence on the **2**0F NMR spectrum monitored by the asymmetric beta -decay of the polarized **2**0F nuclei. In the cubic crystals CaF//2, SrF//2 and BaF//2 one annealing step was observed in the region of 60-100 K corresponding to an activation enthalpy of about 0. 2 ev. A second step occurs near 220 K, corresponding to about 0. 6 ev. In tetragonal MgF//2 two annealing steps were observed at 13 and 60 K corresponding to 0. 037 and 0. 17 ev, respectively.
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In: Journal de physique. Colloque, Vol. 41, No. 7, 1979, p. c6. 381-c6. 384.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - RADIATION INDUCED POINT DEFECTS IN CaF2, SrF2, BaF2 AND MgF2.
AU - Buttler, W.
AU - Stoeckmann, H. J.
AU - Fujara, F.
AU - Heitjans, P.
AU - Kiese, G.
AU - Ackermann, H.
AU - Bader, B.
AU - Doerr, K.
AU - Grupp, H.
AU - Lauter, H.
PY - 1979
Y1 - 1979
N2 - Single crystals of several alkaline earth fluorides were irradiated with thermal polarized neutrons at various temperatures. The neutron capture process **1**9F(n, gamma )**2**0F produces recoil displaced **2**0F ions (recoil energy: several hundred ev) and simultaneously some nearby point defects. These defects were studied by their influence on the **2**0F NMR spectrum monitored by the asymmetric beta -decay of the polarized **2**0F nuclei. In the cubic crystals CaF//2, SrF//2 and BaF//2 one annealing step was observed in the region of 60-100 K corresponding to an activation enthalpy of about 0. 2 ev. A second step occurs near 220 K, corresponding to about 0. 6 ev. In tetragonal MgF//2 two annealing steps were observed at 13 and 60 K corresponding to 0. 037 and 0. 17 ev, respectively.
AB - Single crystals of several alkaline earth fluorides were irradiated with thermal polarized neutrons at various temperatures. The neutron capture process **1**9F(n, gamma )**2**0F produces recoil displaced **2**0F ions (recoil energy: several hundred ev) and simultaneously some nearby point defects. These defects were studied by their influence on the **2**0F NMR spectrum monitored by the asymmetric beta -decay of the polarized **2**0F nuclei. In the cubic crystals CaF//2, SrF//2 and BaF//2 one annealing step was observed in the region of 60-100 K corresponding to an activation enthalpy of about 0. 2 ev. A second step occurs near 220 K, corresponding to about 0. 6 ev. In tetragonal MgF//2 two annealing steps were observed at 13 and 60 K corresponding to 0. 037 and 0. 17 ev, respectively.
UR - http://www.scopus.com/inward/record.url?scp=0018493870&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:0018493870
VL - 41
SP - c6. 381-c6. 384
JO - Journal de physique. Colloque
JF - Journal de physique. Colloque
SN - 0449-1947
IS - 7
T2 - Europhys Top Conf, 3rd, Lattice Defects in Ionic Cryst
Y2 - 17 September 1979 through 21 September 1979
ER -