Determination of the isotopic shift of the first resonance line in Cs(I) spectrum for the isotopes 131Cs, 132Cs,and 136Cs |
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Authors: | S Ullrich EW Otten |
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Institution: | I. Physikalisches Institut der Universität Heidelberg, 69 Heidelberg, W. Germany |
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Abstract: | The isotope shifts of the resonance line of 131Cs, 132Cs, and 136Cs with respect to 133Cs were determined by a new scanning technique to be , , . In accordance with results from other Cs isotopes and neighbouring elements they show the change 〈δr2〉 in the second radial moment of the nuclear charge distribution to be a factor of 5 to 10 smaller than expected from the model of uniform charge distribution. Integral isotope shifts over the isotopic chains of Xe, Cs, and Ba were analyzed in terms of collective models. Assuming an isotopic shift discrepancy of 0.5 for the nuclear volume shift it was possible to derive deformation parameters in quantitative agreement with those from B(E2) measurements. |
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Keywords: | Isotope shifts |
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