Angular distribution and linear polarization of the gamma rays from oriented 56Co nuclei |
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| Affiliation: | 1. R4P (Reflection and Research on Resistance to Pesticides) Network, Unité Mixte de Recherche (UMR) Biologie et Gestion des Risques en Agriculture (BIOGER), Institut National de la Recherche Agronomique (INRA), 78850 Thiverval-Grignon, France;1. Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong, China;2. Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL, USA;1. Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran;2. Department of Medical Physics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran;1. School of Life Sciences, East China Normal University, Shanghai, 200241, China;2. Department of Aquaculture, College of Marine Sciences, Hainan University, Haikou, Hainan, 570228, China;3. School of Biological Sciences, Flinders University, Adelaide, SA, 5001, Australia;1. Brazilian Agricultural Research Corporation - Embrapa Environment, Ministry of Livestock and Food Supply, Jaguariúna, SP, Brazil;2. Université du Québec à Rimouski, Département de Biologie, Chimie et Géographie, G5L3A1, Rimouski, QC, Canada;3. Laboratory of Animal Welfare and Avian Pathology, Faculty of Agronomy and Veterinary Medicine, University of Brasília, Brasília, DF, Brazil;4. Nacional Institute for Space Research, São José dos Campos, SP, Brazil;5. São Paulo State University, São José dos Campos, SP, Brazil;6. Federal University of Lavras, Department of Agricultural Engineering, Lavras, MG, Brazil;7. São Paulo State University, Aquaculture Center – CAUNESP, Jaboticabal, SP, Brazil;1. Dept. of Geography and Institute for CyberScience, Geoinformatics and Earth Observation Laboratory, The Pennsylvania State University, University Park, PA, United States;2. Computational Sciences and Engineering Division, Geographic Information Science and Technology Group, Oak Ridge National Laboratory, Oak Ridge, TN, United States;3. Center for Social Complexity, Krasnow Institute for Advanced Study, George Mason University, Fairfax, VA, United States;4. Research Application Laboratory, National Center for Atmospheric Research, Boulder, CO, United States |
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| Abstract: | Measurements are reported on the beta-gamma and gamma-gamma coincident radiation observed in the decay of 56Co and on the angular distribution and linear polarization of the gamma rays emitted by oriented 56Co nuclei. Discrepancies between various proposed decay schemes have been removed by means of coincidence measurements (performed at room temperature). Experiments with oriented nuclei (using low temperature techniques) gave information about the multipole order of the gamma rays, the mixing ratio of two multipoles and the electric or magnetic character of the transitions. As a result, evidence is presented for a decay scheme of 56Co and for spin and parity assignments to the excited levels in 56Fe (see fig. 10). A possible theoretical interpretation of some of these levels is discussed. A review is given of the data available from other experiments. |
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