β-Decay of Light Neutron-Rich Nuclei

The β-decay of neutron-rich carbon, nitrogen and fluorine isotopes have been systematically studied using the OXBASH Shell Model. In the psd, spsd and spsdpf model space, we use the WBP interaction to calculate the half-lives and neutron emission probabilities of neutron-rich carbon and nitrogen isotopes, respectively. With the USD (W) and CW interactions, we calculate the half-lives and neutron emission probabilities of neutron-rich fluorine isotope in the sd model space, respectively. The calculated half-lives and neutron emission probabilities reproduce recent experimental data very well. It seems to show that the particles of the neutron-rich carbon and nitrogen isotopes are mainly excited in the spsd space. The β-decay of ²¹N to the neutron bound states in ²¹O is mostly the first forbidden transition which makes the neutron emission probability increase. The theoretical calculation of β-decay of ²⁵F to ²⁵Ne with CW interaction shows that CW interaction is better than USD interaction.