Enhancement of parity and time invariance violation in the radium atom

There are several factors that lead to a huge enhancement of parity and time invariance violating effects in the Ra atom: very close electronic levels of opposite parity, the large nuclear charge $Z,$ and the collective nature of $T,P$-odd nuclear moments. Experiments with radium may be used to measure its nuclear anapole, magnetic quadrupole, and Schiff moments. Such measurements provide information about parity and time invariance violating nuclear forces and electron-nucleon interactions.