K-forbidden allowed $ \beta$ transitions in heavy nuclei |
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Authors: | P C Sood O S K S Sastri and R K Jain |
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Institution: | (1) Department of Physics, Sri Sathya Sai University, 515 134 Prasanthinilayam (A.P), India;(2) Department of Physics, Sri Sathya Sai University, 560 067 Brindavan, Bangalore, India |
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Abstract: | The role of the band quantum number K in influencing the character of allowed transitions in heavy deformed nuclei is examined. The conditions for the occurrence of K -forbidden decays in this region are explored. Specific cases of “allowed” decays proceeding via
K = 2 to
K = 6 channels are presented to illustrate the phenomenon. The listed
K = 2 transitions, which by themselves contribute over 10% of all the presently known allowed transitions for A
228 nuclei, are seen to have an average , which is clearly outside the normal range for allowed transitions. It is concluded that, wherever the -connected states can be confidently labelled using the quantum numbers, the K -forbiddenness is in general as significant as that involving the other two (spin and parity) quantum numbers. |
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Keywords: | PACS" target="_blank">PACS 21 10 Re Collective levels 23 40 -s decay" target="_blank">gif" alt="$ \beta$" align="middle" border="0"> decay double decay" target="_blank">gif" alt="$ \beta$" align="middle" border="0"> decay electron and muon capture 27 90 +b " target="_blank">gif" alt="$\ensuremath A \geq 220$" align="middle" border="0"> |
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