First Spectroscopy in 40Mg and the Implications for Structure Near the Dripline

by Heather Crawford (Lawrence Berkeley National Laboratory)

Tuesday 16 Feb 2021, 13:30 → 15:00 Asia/Tokyo

=Date and Place=

Feb. 16th(Tue.), 13:30~ via ZOOM meeting system

 

=Lecturer=

Dr. Heather Crawford

(Lawrence Berkeley National Laboratory)

 

=Title=

First Spectroscopy in 40Mg and the Implications  for Structure Near the Dripline

 

=Abstract=

The study of nuclei far from stability is one of the most active and challenging areas of nuclear structure physics.  One of the most exotic neutron-rich nuclei currently accessible to experiment is 40Mg, which lies at the intersection of the nucleon magic number N=28 and the drip line, and is expected to have a large prolate deformation similar to that observed in the neighboring lighter isotopes 32-38Mg.  In addition, the occupation of the weakly bound low-l p3/2 state may lead to the appearance of an extended neutron halo.  40Mg offers an exciting possibility and rare opportunity to investigate the coupling of weakly bound valence particles to a deformed core, and the influence of near threshold effects on collective rotational motion.  I will discuss the results of an experiment carried out at RIBF to study 40Mg, the unexpected excitation spectrum observed, and possible interpretations for the structure of this key nucleus. 

20210216RIBFsemiPoster-293.pdf