Abstract
Nuclear orientation and nuclear magnetic resonance experiments were performed on185, 187, 189Pt isotopes oriented in Fe and single crystal Zn at temperatures down to about 6 mK. The hyperfine splitting frequencies of185Pt and187Pt in iron were determined to be 164.9(2) and 261.1(2) MHz, respectively. With the hyperfine field of −126.1(2.5) T, the g-factors are deduced to be |g(185Pt)|=0.172(3) and |g(187Pt)|=0.272(5).
The spectroscopic quadrupole moment of187Pt was found to be negative with magnitude similar to that of189Pt, indicating a predominantly oblate ground state deformation for both isotopes. The spectroscopic quadrupole moment of185Pt was found to be positive, with the ratio Q(185Pt)/Q(189Pt)=−3.6(9), clearly indicating a change to prolate ground state deformation.
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R. Eder, E. Hagn and E. Zech, Phys Lett158B 371 (1985).
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Eder, R., Ashworth, C.J., Berkes, I. et al. Shape transition in light Pt isotopes: Magnetic moments and electric quadrupole moment ratios for185,187,189Pt. Hyperfine Interact 43, 469–472 (1988). https://doi.org/10.1007/BF02398326
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DOI: https://doi.org/10.1007/BF02398326