=Date and Place=
Dec.11th(Tue.) 13:30~ at RIBF Hall
(Center for Nuclear Study, The University of Tokyo)
"First mass measurements of 55-57Ca"
An occurrence of magic number in exotic nuclei was first discovered at the beginning of this century and a lot of nuclear physicists are interested in this topic as an important feature of exotic nuclei. To discuss this topic, the atomic masses around and beyond the interested nucleus are essential physical quantities.
The TOF-Brhotechnique is one of the powerful tools to extend atomic mass database to extreamlyexotic nuclei. By using this method combined with BigRIPS-SHARAQ system we have done direct mass measurements of Ca isotopes beyond the N=34 magic number, and recently confirmed a shell closure of neutrons in 54Ca.
In this talk, I will introduce details of the performed experiment and discuss the results. as well as a future plan of TOF-Brhomass measurements by SHARAQ.