Molecular rotational resonance (MRR) spectroscopy operates in the microwave region, detecting transitions between pure rotational energy levels. Combined with adiabatic cooling, MRR produces highly ...

Nuclear magnetic resonance (NMR) spectroscopy is a technique that detects the chemical environment of atomic nuclei by the absorption of radio-frequency electromagnetic radiation when in the ...

"This speed – alongside the weakening of Earth's magnetic field by around nine per cent in the past 170 years – could indicate an upcoming reversal," said Cooper.

Application to the Stern and Gerlach and magnetic resonance experiments. J. Phys. Radium 11, 255–265 (1950).