Abstract
Gamma-ray anisotropies were measured for the206Bi radioisotope oriented at low temperature in iron and gadolinium hosts. Multipole mixing ratios for 20 gamma transitions in206Pb nucleus have been deduced, 12 of them for the first time. Several of these data could be compared with predictions of the shell model including the residual interaction of P2-type. Such comparison indicated that interpretation of the present experimental results needed a more developed theoretical description of the206Pb nucleus. A first evidence of orientation of the206Bi nuclei in gadolinium was obtained. Considerable attenuation of several gamma-ray anisotropies due to the 2200 keV isomeric state in206Pb has been found and corresponding attenuation factors G2= =0·71(6) and 0·63(6) have been deduced for iron and gadolinium hosts, respectively.
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Malinský, P., Šimečková, E., Čížek, P. et al. Low temperature nuclear orientation of206Bi in gadolinium and iron hosts. Czech J Phys 41, 138–148 (1991). https://doi.org/10.1007/BF01598133
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DOI: https://doi.org/10.1007/BF01598133