Abstract

The clustering aspects in alpha-conjugate nuclear system 20Ne has been investigated comparatively within microscopic and macroscopic approaches of relativistic mean field theory (RMFT) and quantum mechanical fragmentation theory (QMFT), respectively. For the ground state of 20Ne, the matter density distribution calculated within RMFT, depict the trigonal bipyramidal structure of 5α’s and within QMFT, the equivalent α+16O cluster configuration is highly preformed. For excited state corresponding to experimental available energy, the QMFT results show that in addition to α+16O clusters, other xα-type clusters (x is an integer) are also preformed but in addition np-xα type (n, p are neutron and proton, respectively) 10B clusters are having relatively more preformation probability, due to the decreased pairing strength in liquid drop energies at higher temperature. These results are in line with RMFT calculations for intrinsic excited state which show two equal sized fragments, probably 10B clusters.

Highlights

  • The production of characteristic x-rays following the impact of photons, electrons, or protons has been extensively studied

  • Experimental results of L-subshell X-ray production cross sections induced by the impact of several ions heavier than protons were compiled in order to propose possible scaling laws

  • + L1O3 + L1O2 + L2N1 + L2O4) is recommended, based on a different reduced velocity parameter ξ. These results appear to be useful for all the studied projectile-target combinations covered in this work, supporting the idea that more theoretical studies in this direction should be done

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Summary

Introduction

The production of characteristic x-rays following the impact of photons, electrons, or protons has been extensively studied. The collision with heavier ions produces other phenomena that do not occur in the other cases. The creation of molecules with a short life, the capture of electrons from the target atom by the projectile, and stronger multiple ionizations of the target atom, are only a few examples. The ionization cross sections are higher than those induced by protons. There is interest in using x-ray production by heavy ion impact for analytical applications [6, 12]. Journal of Nuclear Physics, Material Sciences, Radiation and Applications Vol-4, No-1, August 2016 pp.

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