Abrupt changes in alpha decay systematics as a manifestation of collective nuclear modes

Abstract

An abrupt change in $\alpha$ decay systematics around the N=126 neutron shell closure is discussed. It is explained as a sudden hindrance of the clustering of the nucleons that eventually form the $\alpha$ particle. This is because the clustering induced by the pairing mode acting upon the four nucleons is inhibited if the configuration space does not allow a proper manifestation of the pairing collectivity.

6 pages, 3 figures, submitted to Phys. Rev. C, a few new references added

References in corpus (4)

• Universal decay law in charged-particle emission and exotic cluster radioactivity
• Microscopic mechanism of charged-particle radioactivity and generalization of the Geiger-Nuttall law
• Alpha-decay lifetimes semiempirical relationship including shell effects
• A novel manifestation of $\alpha$-clustering: new '$\alpha$ + ${}^{208}$Pb' states in ${}^{212}$Po revealed by their enhanced E1 decays

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• New $\alpha$-Emitting Isotope ${}^{214}$U and Abnormal Enhancement of $\alpha$-Particle Clustering in Lightest Uranium Isotopes
• Alpha Decay in the Complex Energy Shell Model
• Empirical pairing gaps, shell effects, and di-neutron spatial correlation in neutron-rich nuclei
• Alpha decay as a probe for the structure of neutron-deficient nuclei
• $N=Z$ nuclei: A laboratory for neutron-proton collective mode
• Global calculations on the microscopic energies and nuclear deformations: Isospin dependence of the spin-orbit coupling
• $\alpha$ Decay Half-life Estimation and Uncertainty Analysis
• Recent progress in configuration-interaction shell model
• $\alpha$ knockout reaction as a new probe for $\alpha$ formation in $\alpha$-decay nuclei
• Odd-even staggering in neutron drip line nuclei
• The single-particle unit for alpha decay
• Localisation and alpha radioactivity