J-dependence of the isotope shift in Gd I 4f
7 5d
2 6s(a
11
F) |
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Authors: | H -D Kronfeldt G Klemz |
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Institution: | 1. Optisches Institut, Technische Universit?t Berlin, Strasse des 17. Juni 135, W-1000, Berlin 12, Germany
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Abstract: | TheJ-dependence of the isotope shift in the terma 11 F of 4f 7 5d 2 6s between six stable Gd isotopes was found to be represented by these parameter values (in MHz):z 5d (160?158)=19.4(1.8),z 5d (160?157)=37.2(1.0),z 5d (160?156)=42.4(1.7),z 5d (160?155)=49.1(2.0),z 5d (160?154)=59.0(2.0). The normalization with the corresponding changes in the mean-square nuclear charge-radiiδ〈r 2〉 yields values which are almost constant, mean value:z 5d /δ〈r 2〉=134(14) MHZ/fm2. This indicates a second order IS interaction of the magnetic and the field shift operator. |
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Keywords: | |
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