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One of the main ingredients in nuclear structure studies using shell modelare the single-particle energy (spe). In order to obtain these valuesaccurately, experimental data is needed. The region around the doubly magicnuclide 100Sn is very interesting for nuclear studies in terms of structure,reaction and nuclear astrophysics. Experimental spectrum data for the 101Snisotope is required for nuclear shell model studies to be carried out in thisregion. Since there is not enough experimental data in the literature,different approaches are used for the obtaining spes for the region such asusing the hole excitation spectrum in 131Sn or using the lightest and closestisotope 107Sn which figures the model space orbitals. In this work, we haveperformed second order polynomial fits of the tree single-particle states s1/2,d3/2 and h11/2 in the light Sn isotopes up to 113Sn and 115Sn which are notdetermined yet experimentally. By an extrapolation toward light Sn isotopes, wecan obtain the excitation energies of all the single-particle states in 101Sn.Subsequently, neutron spes of the model space orbitals are defined. Shell modelcalculations for even and odd 102-107Sn isotopes are carried out using the newinteractions and the results are compared with the experimental data andresults obtained using the widely used interaction sn100pn.

Neutron Single-particle States in 101Sn by Polynomial Fits and Shell Model Calculations for Light Sn Isotopes