Abstract
The lifetime of the 331.3 keV 0 +2 state in100Zr has been measured at the gas-filled recoil separator for fission products JOSEF. By observing the delayed coincidences between theβ-particles populating the level and theE0 conversion electrons from its decay into the ground state, a half-life of 3.37±0.30 ns has been obtained. From the measured lifetime and the relative intensities of the 0 +2 →0 +1 and 0 +2 →2 +1 transitions, values of 0.493±0.015 for theE0 strength parameterρ, and of 16 single particle units forB(E2,2 +1 → 0 +2 ) have been deduced. The enhanced nature of theE0 transitions suggests mixing of the 0 +1 and 0 +2 states which may be estimated by comparing the experimentalB(E2) values for the 2 +1 →0 +1 and 2 +1 →0 +2 transitions with the predictions of the asymmetric VMI model.
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The authors wish to thank Prof. R.K. Sheline, Prof. O.W.B. Schult and Dr. H. Toki for many fruitful discussions. They also express their thanks to Mr. W. Tenten, Mr. J.W. Borgs, Mr. I.A. Jeglorz and Mr. R. Seidemann for their assistance during the experiment.
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Khan, T.A., Lauppe, W.D., Sistemich, K. et al. Lifetime of the 331.3 keV 0 +2 state in100Zr. Z Physik A 284, 313–317 (1978). https://doi.org/10.1007/BF01406804
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DOI: https://doi.org/10.1007/BF01406804