# Rotational excitations in near neutron-drip line nuclei: the birth and death of particle-bound rotational bands and the extension of nuclear landscape beyond spin zero neutron drip line

## TL;DR

This paper uncovers mechanisms in rotating neutron-rich nuclei that enable the formation and disappearance of particle-bound rotational bands, extending the nuclear landscape beyond the neutron drip line.

## Contribution

It introduces new rotational mechanisms involving Coriolis interactions that explain the birth and death of particle-bound bands near the neutron drip line.

## Key findings

- Strong Coriolis interaction can bind unbound nucleonic states at high angular momentum.
- Particle-bound rotational bands can form beyond the neutron drip line due to rotation.
- Rotational effects can cause the disappearance of bound bands at high spins.

## Abstract

Two new mechanisms active in rotating nuclei located in the vicinity of neutron drip line have been discovered. Strong Coriolis interaction acting on high-$j$ orbitals transforms particle-unbound (resonance) nucleonic configurations into particle-bound ones with increasing angular momentum. The point of the transition manifests the birth of particle-bound rotational bands. Alternative possibility of the transition from particle-bound to resonance rotational band (the death of particle-bound rotational bands) with increasing spin also exists but it is less frequent in the calculations. The birth of particle-bound rotational bands provides a mechanism for the extension of nuclear landscape to neutron numbers which are larger than those of the neutron drip line in non-rotating nuclei.