Rotational motion of triaxially deformed nuclei studied by microscopic angular-momentum-projection method II: Chiral doublet band

TL;DR

This paper uses a microscopic angular-momentum projection method to study chiral doublet bands in triaxially deformed nuclei, demonstrating their natural emergence and characteristic transition properties without core assumptions.

Contribution

It introduces a fully microscopic framework to analyze chiral doublet bands, confirming their properties align with phenomenological models.

Findings

Chiral doublet bands appear naturally in microscopic calculations.

The transition probabilities match phenomenological model predictions.

The method applies to nuclei like $^{128}$Cs and $^{104}$Rh.

Abstract

In the sequel of the present study, we have investigated the rotational motion of triaxially deformed nucleus by using the microscopic framework of angular-momentum projection. The Woods-Saxon potential and the schematic separable-type interaction are employed as a microscopic Hamiltonian. As the first example nuclear wobbling motion was studied in detail in the part~I of the series. This second part reports on another interesting rotational mode, chiral doublet bands: two prototype examples, $^{128}$Cs and $^{104}$Rh, are investigated. It is demonstrated that the doublet bands naturally appear as a result of the calculation in this fully microscopic framework without any kind of core, and they have the characteristic properties of the $B(E2)$ and $B(M1)$ transition probabilities, which are expected from the phenomenological triaxial particle-rotor coupling model.