论文标题
核中具有八度核变形及其在分子中的CP侵略作用的核磁矩矩
Enhanced Magnetic Quadrupole Moments in Nuclei with Octupole Deformation and their CP-violating effects in molecules
论文作者
论文摘要
具有八极变形的核具有非零的电八极矩，电动偶极矩（EDM），Schiff矩和磁性四极矩（MQM），并在固有框架中与细胞核旋转。在实验室框架中具有明确角度动量的状态下，这些时刻是由于平等（P）和时间逆转不变性（T）保护所禁止的，这意味着由于核旋转而导致的期望值消失了。然而，具有八极变形的核具有与平均旋转状态相同的双重旋转状态的双重旋转，并由t，p-odd核力量混合。这种混合产生了沿核自旋的核轴的方向，并且在实验室框架中存在所有固有框架中的所有矩（前提是核自旋I足够大，可以允许这种时刻）。这种机制产生了增强的T，P侵入核矩。这种增强也发生在核中，具有柔软的八极振动模式。在以前的工作中已经计算了这种核中的Schiff力矩。在本文中，我们考虑了具有核旋转$ i \ geq 1 $的同位素出现的磁性四极力矩。核MQM和电子之间的磁相互作用会产生原子EDM和T，P抗核自旋 - 分子轴相互作用常数，用于具有非零电子角动量的电子状态的分子。这些常数的测量可用于测试CP侵略理论，并在原子，分子和固态实验中寻找轴突暗物质。潜在的候选核包括153EU，161dy，221fr，223fr，223rra，223rn，225ac，227ac，229th，229pa，233u和235u。随后，我们考虑了含有这些核的分子（EUO，EUN+，RAF，ACO，ACN+，ACF+，THO和THO和THF+）。
Nuclei with an octupole deformation have a non-zero electric octupole moment, electric dipole moment (EDM), Schiff moment and magnetic quadrupole moment (MQM) in the intrinsic frame which rotates with the nucleus. In a state with definite angular momentum in the laboratory frame, these moments are forbidden by parity (P) and time reversal invariance (T) conservation, meaning their expectation values vanish due to nuclear rotation. However, nuclei with an octupole deformation have doublets of close opposite parity rotational states with the same spin, which are mixed by T,P-odd nuclear forces. This mixing produces the orientation of the nuclear axis along nuclear spin and all moments existing in the intrinsic frame appear in the laboratory frame (provided the nuclear spin I is sufficiently large to allow such moment). Such a mechanism produces enhanced T,P-violating nuclear moments. This enhancement also takes place in nuclei with a soft octupole vibration mode. Schiff moments in such nuclei have been calculated in previous works. In the present paper we consider the magnetic quadrupole moment which appears in isotopes with nuclear spin $I \geq 1$. Magnetic interaction between the nuclear MQM and electrons produces an atomic EDM and T,P-violating nuclear spin - molecular axis interaction constants for molecules in electronic states with non-zero electron angular momentum. Measurements of these constants may be used to test CP-violation theories and search for axion dark matter in atomic, molecular and solid state experiments. Potential candidate nuclei include 153Eu, 161Dy, 221Fr, 223Fr, 223Ra, 223Rn, 225Ac, 227Ac, 229Th, 229Pa, 233U and 235U. We subsequently consider molecules containing these nuclei (EuO, EuN+, RaF, AcO, AcN+, AcF+, ThO and ThF+).
