| Experiments at CERN | |
| Title | Study of the effect of shell stabilization of the collective isovector valence-shell excitations along the N=80 isotonic chain |
| Author(s) | Gladnishki, K A ; Blazhev, A A ; Kruecken, R ; Coquard, L ; Bloch, T P ; Wadsworth, R ; Danchev, M T ; Jenkins, D G ; Kroell, T ; Leske, J |
| Experiment | IS496 |
| Greybook | See IS496 experiment |
| Approved | 02 December 2009 |
| Status | Finished |
| Collaboration | ISOLDE |
| Accelerator | CERN ISOLDE |
| Abstract | It is proposed to initiate an experimental program to study the quadrupole-collective isovector valence-shell excitations the so-called mixed-symmetry states (MSSs) of unstable nuclei from the N = 80 isotonic chain. The main aim of this program is to investigate the microscopic mechanism which leads to a concentration or a fragmentation of the MSSs, an effect dubbed $\textit{shell stabilization}$ of MSSs. This will be achieved by identification of MSSs of the unstable nuclei $^{140}$Nd and $^{142}$Sm. The MSSs of these nuclei will be identified experimentally by measuring their relative populations with respect to the population of the first 2$^{+}$ states in inverse kinematics Coulomb excitation (CE) reactions on light targets. As a first step of this program we apply for a beam time for the radioactive $^{140}$Nd and $^{142}$Sm beams at beam energy of 2.85 MeV/u. These beams will be used to determine the absolute B(E2;2$_{1}^{+} \rightarrow$ 0$_{1}^{+}$) values for $^{140}$Nd and $^{142}$Sm in Coulomb excitation reaction on a $^{48}$Ti target. |
| Related document(s) | CERN-INTC-2009-024 (INTC-P-268) |
Record created 2010-01-12, last modified 2025-04-01