The so-called “island of inversion” is a region in the nuclear landscape where shell-structure changes are observed and in particular the magic neutron number at N=20 vanishes. For those nuclei at Z=10−12 and around N=20, the shell gap at N=20 quenches and pf-shell intruder configurations become important. We address the question how strong such configurations are for very neutron-rich but Z=9...
The magicity of N=20 in the vicinity of Ne, Na, and Mg isotopes vanishes due to pf-shell intruder configuration, which is called 'island of inversion' [1-3]. In recent years, shell evolution of Ne isotopes in this region is emerging topic of interest [4,5]. Nevertheless, there is no observed state of $^{33}$Ne.
It is only known that $^{33}$Ne is unbound nuclei [6] and the 1n separation...
A recent experiment suggests that the ground state of the neutron-unbound nucleus $^\text{26}$O could have a lifetime in the pico-second regime. This would constitute the first case of a radioactive
decay via neutron emission, if this value can be confirmed.
In Dezember 2016, the S20 experiment using a new measurement method to determine the decay lifetime
of the $^\text{26}$O ground state...
Details will be given on the current status of the analysis of the 8He(p, p alpha)4n experiment.
I will give a status report on the analysis of the SAMURAI09 experiment.
In July 2017, the SAMURAI37 experiment was performed with the purpose of measuring the multi-neutron decay of $^6$He and $^8$He after heavy-ion-induced electromagnetic excitation in complete kinematics to study the dipole response of these nuclei.
The combination of the neutron detectors NEBULA and NeuLAND at the SAMURAI setup and the high beam intensities available at RIBF made the...
we would like to propose an experiment to observe the preformed α particles using the quasi-free α-knockout reaction from α-decay nuclei.
I will report the status of the SAMURAI21 experiment that is dedicated for the observation of the unbound nuclei 27O and 28O. In the presentation, I also want to discuss a possible new measurement for 27O as described in the pre-proposal.
