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Excitation functions and isomeric ratios in the reaction130Te (α,xpyn) for α-particle energies between 15 and 37 MeV

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The130Te(α,n)133Xe,130Te(α,p)133I,130Te(α,pn)132I and130Te(α, αn)129Te excitation functions for alpha particle energies between 14.7 and 36.5 MeV are presented. Excitation functions for the last three reactions are measured for the first time and more consistent results for (α, n) are obtained. The isomeric ratios for the (α n), (α, pn) and (α, αn) reactions were deduced. Calculations based on different theoretical models of equilibrium and preequilibrium decay are compared with the experimental results and discussed. Acceptable presentation of the energy behavior of the measured isomeric ratios was obtained when higher angular momentum depletion for preequilibrium emitted particles was included. The absolute values of the isomeric ratios however remain overestimated.

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Authors and Affiliations

  1. Atomic Physics Department, Faculty of Physics, Sofia University, Blvd. “Anton Ivanov” 5, 1126, Sofia, Bulgaria

    A. Kirov, N. Nenoff & D. Kolev

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  1. A. Kirov
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  2. N. Nenoff
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  3. D. Kolev
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Additional information

We want to express our gratitude to Prof. Ts. Vylov and Dr. V. Brudanin (Dubna) who supplied us with measurement equipment, to Dr. Chr. Necheva for taking part in the experiments, to the “U-200” cyclotron staff and to the direction of the Laboratory of Nuclear Reactions (JINR) for making the irradiation possible and to Dr. E. Dobreva (Sofia) for fruitful discussion of the experimental method. We wish to express our gratitude also to Prof. M. Uhl and the NEA data bank for making the computer code STAPRE available to us and to Prof. J. Ernst (Bonn) for fruitful discussions. This project has been completed with the financial support of the Committee for Science at the Council of Ministers under contract No. 644.

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Kirov, A., Nenoff, N. & Kolev, D. Excitation functions and isomeric ratios in the reaction130Te (α,xpyn) for α-particle energies between 15 and 37 MeV. Z. Physik A - Hadrons and Nuclei 341, 443–452 (1992). https://doi.org/10.1007/BF01301388

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