Superheavy Nuclei in the Quark-Meson-Coupling Model

Jirina Stone,Anthony Thomas,Pierre Guichon

doi:10.1051/epjconf/201716300057

Jirina Stone, Anthony Thomas + Show 1 more

Open Access

https://doi.org/10.1051/epjconf/201716300057

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Abstract

We present a selection of the first results obtained in a comprehensive calculation of ground state properties of even-even superheavy nuclei in the region of 96 < Z < 136 and 118 < N < 320 from the Quark-Meson-Coupling model (QMC). Ground state binding energies, the neutron and proton number dependence of quadrupole deformations and Q$_\alpha$ values are reported for even-even nuclei with 100 < Z < 136 and compared with available experimental data and predictions of macro-microscopic models. Predictions of properties of nuclei, including Q$_\alpha$ values, relevant for planning future experiments are presented.

Highlights

One of the main difficulties in solving the nuclear manybody problem is to incorporate nuclear medium effects into the calculation
We have presented the first results of the application of the QMCπ model to superheavy nuclei
Having in mind that the model is dependent on only four, well constrained variable parameters with a clear physical meaning, it is encouraging to observe that predictions for ground state binding energies, axially symmetrical shapes, regions of shell closure and Qα values are in good agreement with experimental data where available

Summary

Introduction

One of the main difficulties in solving the nuclear manybody problem is to incorporate nuclear medium effects into the calculation. One particular area of interest concerns the transuranic superheavy nuclei, where one may hope to discover new chemical elements, not existing in nature but synthesized in the laboratory Theoretical predictions guiding such experiments are of major interest, especially information about spherical and deformed shell closures and related islands of stability. By analogy with electromagnetic polarizabilities, the coefficient d, calculated in terms of the nucleon internal structure, is known as the “scalar polarizability” [1] The appearance of this term in the nucleon effective mass is sufficient to lead to nuclear saturation. This demonstrates a clear link between the internal structure of the nucleon and fundamental properties of atomic nuclei.

Method of calculation

Binding energies and shapes

Qα values

Findings

Summary and conclusions