| DATE: |
2006-10-26 14:30 - 16:30 |
| PLACE: |
University of Tsukuba, Reserch Facility Center for Science and Technology, 3F, conference room |
| TITLE: |
The 14th Tsukuba Seminar on Unstable Nuclei |
| CONTACT: |
A. Ozawa ozawa tac.tsukuba.ac.jp |
| SPEAKER: |
Prof. Wolfgang Mittig (GANIL) |
| LANGUAGE: |
English |
| ABSTRACT: |
In a first part, recent results using the SPEG-time-of-flight method for mass measurements are presented for very neutron-rich nuclei situated around neutron numbers N=20 and N=28. Seven masses have been measured for the first time, and the precision of 36 masses has been significantly improved. These results are used to investigate the evolution of the odd-even staggering of binding energies with neutron number. Especial attention is paid to the evolution of shell closure N=28 when approaching the neutron dripline. Changes in shell structure are observed around N=28 for P and S isotopes but not for Si isotopes. This could be interpreted
as the persistence of shell closure N=28 or as the result of a very sudden change in deformation arising at N=28 for 42Si. In a second part, present developments of the active target MAYA will be shown, illustrated by the measurement of unbound states in nuclei beyond the dripline. |
|
