>>11496531not sure what type of measurement for dose you are looking for, since there are different types of radioactive doses.
but physically, here is how a pure mathematician like me would calculate:
suppose you have a chunk of radioactive material that gives off X particles per second and each particle has on average Y energy. you have a human weighing M kg in the room, and the solid angle of the human from the point of view of the material takes up R steradians. suppose the absorption probability is 0<A<1, the probability of a particle being absorbed if it passes through the human.
the human has XR/(4?) particles pass through it every second, which means AXR/(4?) are absorbed by it's body. this leads to YAXR/(4?) energy being deposited into it's body every second.
if the human stays in the position for T seconds, it will have TYAXR/(4?M) energy absorbed per kg of mass by the end of the experience.
I'm pretty sure energy absorbed per unit mass is a radiation dose measurement, if I remember anything.
if you have 2 chunks of material, just do the formula twice and add em. if you have a whole wall or non-point source, integrate this formula similar to integrating gravity equations for non-point mass. lastly, integrate if any of the variables like A, X, R change over time - a scenario where a human is walking around the room and it's solid angle is changing with time.
