THE LOW-TEMPERATURE QUADRUPOLE ORIENTATION OF RU-103 IN RUTHENIUM
The quadrupole frequency vQ=e2qQ/h of103Ru (Z=44, N=59) in a ruthenium single crystal has been measured using the technique of low temperature quadrupole orientation to be vQ(103Ru Ru)=-14.7(5) MHz. Temperatures below 2 mK were reached in this experiment using a PrNi5 demagnetization stage attached...
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| Format: | Journal article |
| Language: | English |
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Kluwer Academic Publishers
1986
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| Summary: | The quadrupole frequency vQ=e2qQ/h of103Ru (Z=44, N=59) in a ruthenium single crystal has been measured using the technique of low temperature quadrupole orientation to be vQ(103Ru Ru)=-14.7(5) MHz. Temperatures below 2 mK were reached in this experiment using a PrNi5 demagnetization stage attached to a3He-4He dilution refrigerator. Using the measured magnitude of the Ru Ru electric field gradient (EFG) at low temperatures |eq(Ru Ru)|=1.02(3)×1017 V.cm-2 [1] and adopting the sign of eq(Ru Ru) to be negative from systematics, this result yields a value for the ground-state electric quadrupole moment of103Ru of Q(103Ru)=+0.59(2) b. This moment may be interpreted using the weak coupling model of de-Shalit [2]. A Korringa constant for103Ru Ru of CK=39(6) Ks was measured in this experiment. Taking advantage of a small iridium contamination of the ruthenium single crystal, the quadrupole moment of the192Ir ground state was determined to be Q(192Ir)=+2.12(25) b. The sign of the Ir Ru electric field gradient was found to be negative as a result of this work. © 1986 J.C. Baltzer A.G., Scientific Publishing Company. |
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