Abstract
199mHg was produced and mass separated at the ISOLDE facility (CERN). Nuclear orientation achieved by optical pumping via the resonance line 6s 2 1 S 0→6s6p 3 P 1,λ=2537Å was monitored by means of the anisotropy of theγ-radiation emitted in the cascade199mHg(I=13/2+)
199*Hg(I=5/2−)199Hg(I=1/2−).
Maximum anisotropies of 35% (2,8%) were found in the M4 (E2) transition. A Zeeman scanning of the3 P 1 state yielded the positions ofF=13/2 and theF=15/2 hfs components relative to the reference isotope204Hg at 15.13 (15) GHz and −2.86 (15) GHz respectively. Isotopic shift and the quadrupole interaction constant were deduced from these values using the knownA factor.δv 199m/2O4=v 2O4−v 199m=12.20 (16) GHzB=−0.86 (25) GHz.
From theB factor the spectroscopic quadrupolment was calculated asQ s =1.54 (44) barn.
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This publication comprises part of the thesis of J. Bonn.
The authors acknowledge the permanent help and hospitality of the CERN Nuclear Chemistry group. This work was sponsored by the “Bundesministerium für Forschung und Technologie”.
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Bonn, J., Huber, G., Kluge, H.J. et al. Orientation of199mHg by optical pumping detected by γ-radiation anisotropy. Z Physik A 272, 375–380 (1975). https://doi.org/10.1007/BF01440864
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DOI: https://doi.org/10.1007/BF01440864