Measurement of parity admixtures in nuclear forces in180Hf,181Ta and203Tl |
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Authors: | Eckart Kuphal |
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Affiliation: | 1. Institut für Technische Kernphysik der Technischen Hochschule Darmstadt, Germany
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Abstract: | The parity mixing in nuclear states was studied by measuring the circular polarizationP of the γ-radiation emitted from unpolarized nuclei. The analyzer was a “radial transmission magnet” of high symmetry. With 4 NaI scintillation counters and the current integration method 4 independent results were obtained simultaneously. The polarimeter efficiency was determined via the Quadratic Compton effect. Studies of the polarized bremsstrahlung with170Tm,177Lu and198Au sources served as tests for the calculated corrections due to the bremsstrahlung effect. Our results for the circular polarization are:P=?(2.0±0.4) · 10?3 for the 501 keV transition in180Hf,p=+(1±4) · 10?6 for the 482 keV transition in181Ta andP=+(1±7) · 10?6 for the 279 keV transition in203Tl. Thus, in the case of180Hf, the existence of the parity mixing in nuclear states was confirmed. |
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