A certain β-decay process has three components, with maximum energies 0.672, 0.536, and 0.256 MeV. The first component has two coincident γ rays: 0.468 and 0.316MeV, which are also coincident on each other. the second component has coincident γ's of 0.604, 0.308, 0.136, 0.468, 0.612, 0.296, and 0.316MeV. The third β component is in coincidence with all of the above, plus 0.885, 0.589, 0.416, and 0.280MeV. Use this information to construct a decay scheme and find the mass difference between the nuclear ground states.