An ensemble of nuclei at low temperature, subject to a hyperfine interaction, spontaneously orients. If these are radioactive nuclei, how will this affect the radiation they emit? This is exploited by a method called Low-Temperature Nuclear Orientation (LTNO).
In the video, a LTNO experiment on a NdNi-sample is discussed. Figure out how the radiation pattern produced by this nuclear ensemble looks like, and determine from this the type of hyperfine interaction felt by these nuclei. Fill out your answer in the form underneath