The Lead Radius Experiment PREX
Conference
·
OSTI ID:1994971
The PREX experiment at Jefferson Lab has measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from 208Pb at an energy of 1.06 GeV and a scattering angle of 5?. Since the Z0 boson couples mainly to neutrons, this asymmetry provides a clean measurement of the neutron RMS radius Rn of the lead nucleus. In addition to being a fundamental test of nuclear models, a precise measurement of Rn pins down the density dependence of the symmetry energy of neutron rich nuclear matter, which has impacts on neutron star structure, heavy ion collisions, and atomic parity violation experiments. The results from the first measurements performed in 2010 will be presented. Prospects for follow-up experiments with 208Pb and 48Ca will be discussed.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1994971
- Report Number(s):
- JLAB-PHY-11-1599; DOE/OR/23177-6967
- Country of Publication:
- United States
- Language:
- English
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