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Cluster decay of 112−122Ba isotopes from ground state and as an excited compound system

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Abstract

The decay properties of various even–even isotopes of barium in the range 112 ≤A ≤ 122 is studied by modifying the Coulomb and proximity potential model for both the ground and excited state decays, using recent mass tables. Most of the values predicted for ground state decays are within the experimental limit for measurements (T 1/2 < 1030 s). The minimum T 1/2 value refers to doubly magic or nearly doubly magic Sn (Z= 50) as the daughter nuclei. A comparison of log 10(T 1/2) value reveals that the exotic cluster decay process slows down due to the presence of excess neutrons in the parent nuclei. The half-lives are also computed using the Universal formula for cluster decay (UNIV) of Poenaru et al and the Universal decay law (UDL) of Qi et al, and are compared with CPPM values and found to be in good agreement. A comparison of half-life for ground and excited systems reveals that probability of decay increases with a rise in temperature or otherwise, inclusion of excitation energy decreases the T 1/2 values.

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  1. School of Pure and Applied Physics, Kannur University, Swami Anandatheertha Campus, Payyanur, 670 327, India

    K P SANTHOSH, P V SUBHA & B PRIYANKA

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  1. K P SANTHOSH
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Correspondence to K P SANTHOSH.

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SANTHOSH, K.P., SUBHA, P.V. & PRIYANKA, B. Cluster decay of 112−122Ba isotopes from ground state and as an excited compound system. Pramana - J Phys 86, 819–836 (2016). https://doi.org/10.1007/s12043-015-1084-7

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