2. The photoelectric attenuation coefficient in lead at 150 keV is 620x10-28 m²/atom. Assuming that all this coefficient arises from the K electrons, calculate the energy transfer coefficient (in m-¹). Also, express in m²/kg. For lead, there are 2.907x1024 atom/kg, K electron binding energy = 88 keV in lead, density of lead = 11360 kg/m³.

2. The photoelectric attenuation coefficient in lead at 150 keV is 620x10-28 m²/atom. Assuming that all this coefficient arises from the K electrons, calculate the energy transfer coefficient (in m-¹). Also, express in m²/kg. For lead, there are 2.907x1024 atom/kg, K electron binding energy = 88 keV in lead, density of lead = 11360 kg/m³.