The fusion of ^11Li with ^208Pb
Abstract
We studied the fusion of ^11Li with ^208Pb at TRIUMF. The intensity of the ^11Li beam (chopped) was 1000 p/s and the beam on-target time was 114 hours. The stacked foil technique was used to step the beam energies from 40 to 29 MeV (Ec.m. = 27-38 MeV) throughout the array. The α-decay of the stopped EVRs was detected in a α-detector array at each beam energy in the beam-off period. The geometrical efficiency of detection of the decay α-particles has been calculated to be 0.4. To verify this, we measured the evaporation residue yield for the well-known ^7Li + ^209Bi reaction. We have previously measured the evaporation residue cross sections when ^9Li, the ^11Li core, fuses with ^208Pb. We also have done HIVAP calculations of what we might expect for evaporation residue cross sections if ^11Li were to fuse with ^208Pb rather than breakup. The At isotope patterns observed on-line are not those observed for the ^9Li + ^208Pb reaction but are consistent for expectations of complete fusion.
- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 2012
- Bibcode:
- 2012APS..DNP.NE005L