M. A. Jafarizadeh, N. Fouladi, H. Sabri, B. Rashidian Maleki
The spectral statistics of nucleus undergo through the major forms of radioactive decay ({\alpha},{\beta}^- and {\beta}^+(or EC)) and also stable nucleus is investigated. Sequences prepared by 2^+levels (for even mass nuclei) and (1/2)^+ levels (for odd mass nuclei) with using all the available empirical data. With the help of MLE method in the NNSD-based statistics, the chaoticity parameter is estimated for each class of nuclei. The ML-based estimated values propose a deviation to regular dynamics for stable nuclei relative to unstable ones. Also, in addition to more regular dynamics exhibited by nuclei undergo through {\beta}^--decay, nuclei transmitted through {\alpha} decay explore less regular dynamics in compare to other decay modes.
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http://arxiv.org/abs/1202.6252
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