Abstract
Relative conversion line intensities of the 127·37 keV E3 isomeric transition in134Cs have been measured for ten atomic subshells, using the (π/2) √13 beta-ray spectrometer. The multipolarity E3 + (0·07±0·04)% M4 was determined. Internal conversion coefficients were calculated in different physical approximations. Precise calculations were performed for two atomic models (non-relativistic Hartree-Fock-Slater and relativistic Hartree-Fock-Slater). Experimental data were found in agreement with tabulations of Hager and Seltzer and mentioned calculations. An upper limit for the γ-branching ratio γ(138·6 keV M4)/γ(127·37 keV E3) was found to be 0·2%. The measurement of the half-life of the isomeric state has been carried out with a NaJ(Tl) crystal. The result obtained isT 1/2 = (2·95 ± 0·02) h.
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The authors would like to thank Prof. U.Schmidt-Rohr for the interest in this work.
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Martin, B., Merkert, D. Internal conversion investigations for the 127·37 keV E3 transition in134Cs. Czech J Phys 23, 297–305 (1973). https://doi.org/10.1007/BF01587284
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DOI: https://doi.org/10.1007/BF01587284