Electric quadrupole moments of radioactive Pt isotopes |
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Authors: | R. Eder E. Hagn E. Zech |
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Affiliation: | (1) Physik-Department, Technische Universität, D-8046 Garching, FRG |
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Abstract: | Nuclear orientation experiments were performed on189Pt (I=3/2–; T1/2=11 h),191pt (I=3/2–; T1/2=2.8 d) and195mpt=3/2–; T1/2=4.0 d) in an Os single crystal at temperatures down to 10 mK. Preliminary results for the quadrupole splitting o=e2qQ/h are +48 (9), +39 (6), and –87 (12) MHz for189ptOs,191ptOs, and195mptOs, respectively. Preliminary results for the quadrupole moments are –0.8 (4), –0.6 (3), and +1.4 (7) b for189pt,191pt, and195mpt, respectively. In addition, the quadrupole subresonance structure of189pt and191pt in Fe was measured with quadrupole-interaction resolved NMR-ON spectroscopy. The results for the magnetic hyperfine splitting M=¦gNBHF/h¦ and Q are:189ptFe: M=277.9 (1) MHz; Q=+1.39 (5) MHz.191ptFe: M=320.17 (3) MHZ; Q=+1.39 (3) MHz. The ratio of the quadrupole moments of191pt and189pt is deduced to be Q (191Pt/Ql89pt)=+1.00 (4). The negative quadrupole moments of189pt and191pt indicate a predominantly oblate shape of the ground states. |
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