Dobaczewski J, Engel J
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Phys Rev Lett. 2005 Jun 17;94(23):232502. doi: 10.1103/PhysRevLett.94.232502. Epub 2005 Jun 13.
We present a comprehensive mean-field calculation of the Schiff moment of the nucleus 225Ra, the quantity that determines the static electric-dipole moment of the corresponding atom if time-reversal (T) invariance is violated in the nucleus. The calculation breaks all possible intrinsic symmetries of the nuclear mean field and includes, in particular, both exchange and direct terms from the full finite-range T-violating nucleon-nucleon interaction, and the effects of short-range correlations. The resulting Schiff moment, which depends on three unknown T-violating pion-nucleon coupling constants, is much larger than in 199Hg, the isotope with the best current experimental limit on its atomic electric-dipole moment.
我们给出了对原子核(^{225}Ra)的席夫矩的全面平均场计算，若原子核中时间反演（(T)）不变性被破坏，该物理量决定了相应原子的静态电偶极矩。该计算打破了核平均场所有可能的内禀对称性，特别包括了来自完整有限程(T)破坏核子 - 核子相互作用的交换项和直接项，以及短程关联效应。所得的席夫矩取决于三个未知的(T)破坏π介子 - 核子耦合常数，比(^{199}Hg)中的大得多，(^{199}Hg)是目前其原子电偶极矩实验限制最佳的同位素。
