Arrange the following radiation according to their tissue damaging propey from maximum to minimum:: (A) g-rays> X-rays > b - rays > a- rays, (B) a- rays > b - rays > g-rays > X-rays, (C) a- rays > b - rays > X-rays > g-rays, (D) X-rays > g-rays >a- rays > b - rays
Answer is C. Tissue damaging propey of any radiation from any radioactive material is solely dependent on the ionizing effect. The decreasing order of the ionizing activity is as follows: alpha > b > x-ray > g. Alpha paicles haveapproximately four times the mass of a proton or neutron and approximately 8,000 times the mass of a betapaicle. Because of the large mass of the-alphapaicle, it has the highest ionizing power and the greatest ability to damage tissue. gamma and x rays, which are electromagnetic, indirectlyionizing radiation. These are indirectlyionizingbecause they are electrically neutral (as are all electromagnetic radiations) and do not interact with atomic electrons through coulombic forces.