Pairing and shell evolution in neutron rich nuclei

TL;DR

This paper investigates how pairing interactions influence shell structure and nuclear properties in neutron-rich nuclei, revealing new phenomena and providing model-independent predictions supported by theoretical calculations.

Contribution

It introduces a model-independent approach to study pairing effects on shell evolution and predicts new features in neutron-rich nuclei.

Findings

Pairing variation affects shell closures and erosion.

Observed reduction in 2+ state energies.

Slower increase in B(E2) values in neutron-rich nuclei.

Abstract

From the experimental data on odd-even staggering of masses, we have shown that variation of pairing as a function of neutron number plays an important role in many distinctive features like occurrence of new shell closures, shell erosion, anomalous reduction of the energy of the first 2+ state and slower increase in the B(E2, 2_{+}^{1} \rightarrow 0_{+}^{1}) in the neutron-rich even-even nuclei in different mass regions. New predictions have been made in a model independent way. Results of theoretical calculations support the phenomenological findings.