Parity Nonconservation in Ytterbium

为了提高低动量传递时温伯格角值的精度和违反宇称的核偶极矩的测定，将进行灵敏的宇称混合测量。实验将利用所预测的原子镱的大宇称混合效应。对一系列同位素宇称混合的测量将有可能从根本上消除在提取温伯格角时原子理论的不确定性，这种不确定性是由于缺乏对同位素间中子分布变化的了解而造成的。

9877046BudkerA sensitive parity mixing measurement aimed at improving the precision on the value of the Weinberg angle at low momentum transfer and determinations of parity-violating nuclear anapole moments will be performed. The experiments will exploit the predicted large parity mixing effects in atomic ytterbium. Measurements of parity mixing for a series of isotopes will make it possible to essentially eliminate atomic theory uncertainty in extracting the Weinberg angle, which will be due to lack of knowledge of changes in nuclear neutron distributions from isotope to isotope.