• Nuclei in the vicinity of `island of inversion' through the fusion reaction

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    • Keywords


      Nuclear structure; measured $E_{\gamma}$; $\gamma-\gamma$-coin; 𝛾-ray polarization; coincidence angular anisotropy; 34,35P deduced high-spin levels; $J^{\pi}; comparison with shell model predictions.

    • Abstract


      The level structures of $N \sim 19$ nuclei such as 32,34P have been investigated using the 18O(18O,xnyp) and 18O(16O,xnyp) reactions at an incident beam energy of about 34 MeV. The de-exciting 𝛾-transitions were recorded using an array of clover detectors. These detectors have the dual advantage of higher efficiency at $E_{\gamma} \geq 2$ MeV, and are capable of providing information on the linear polarization of the observed 𝛾-transitions. These polarization measurements when coupled with the angular correlations help us to assign uniquely the spin parity for the observed levels. The experimental results have been compared with the predictions of the spherical shell model. The shell-model calculations are able to reproduce the observed energy levels to a reasonable degree. However, the observed transition probabilities are not reproduced by the calculations. Hence there is a need to re-visit these calculations using more detailed and microscopic effective interactions.

    • Author Affiliations


      S S Ghugre1

      1. UGC-DAE CSR, Kolkata Centre, Sector III, LB-8, Bidhan Nagar, Kolkata 700 098, India
    • Dates

  • Pramana – Journal of Physics | News

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