Measurement of the B(E 2 ;2+ ->1+) of 8Li and comparisons to ab initio calculations
Abstract
Precise measurements of electromagnetic transition strengths in light nuclei can provide stringent tests of nuclear ab initio calculations. In the A=7 isobars, specifically 7Li and 7Be, the B(E2) transition strengths have been used to benchmark different ab initio calculations. We will continue testing by extending these measurements into the A=8 region and measure the first excited state in 8Li, in order to provide additional constraints to these ab initio models. These models can give us insight into the structural changes from 7Li to 8Li due to the addition of a neutron. We have performed a Coulomb excitation experiment to measure the B(E 2 2 + -> 1 +) transition strength in 8Li. The 8Li was produced and separated with TwinSol and the Coulomb excitation cross section was measured using particle-gamma coincidences. The preliminary B(E2) value will be presented and compared to ab initio calculations for 8Li, highlighting the structural evolution in Li isotopes due to higher neutron excess. The results of this experiment will also provide a test of the accuracy of available ab initio calculations in this light mass region.
This work has been supported by US NSF Grant No. PHY 14-19765 and no. PHY1401343 and DOE Grant Number DE-FG02-95ER-40934.- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..DNP.FN006H