to four partitions of the energy range: four-fold, and five-fold partitions capture coarse trends in the spectrum, and 10-fold and 20-fold splits capture the finer features. We add a physically meaningful value, the energy value E of the peak µ(E) i.e. Argmax( µ(E)), which is commonly known as the white line energy, as an additional feature to assist with fitting and interpretability. In summary, our feature map transforms a single spectrum of 100 values of µ(E) into 157 multiscale features.