Gamma rays penetrating abilities

A variety of radioactive isotopes is available having gamma rays diller-ing in penetrating ability, and with half-lives varying from a few minutes to many years. Radioactive iodine with an 8 day half-life and radioactive bromine with a l -day half-life were used for most tests. Radiation from these isotopes passes easily through the walls of pipe found in the oil field. 

A further difference between isotope gamma rays and electrons is penetrating ability. As charged particles, electrons have short ranges in matter. Fig. 3 shows energy deposition curves for water irradiated with electrons of various energies. 

Penetrating Abilities of Alpha, Beta, and Gamma Rays... 

In Becquerel s experiment, nuclear radiation from the uranium compound penetrated the lightproof covering and exposed the film. Different types of nuolear radiation have different penetrating abilities. Nuclear radiation inoludes alpha partioles, beta partioles, and gamma rays. 

Alpha particles, beta particles, and gamma rays have different penetrating abilities and shielding requirements. 

How does the penetrating ability of gamma rays compare with that of alpha particles and beta particles ... 

The ability to detect neutron sources at long range (50 to 100 m) has clear applications for national security. Plutonium and other neutron-emitting sources produce penetrating radiation that can be difficult to conceal by shielding. A neutron detector mounted in a vehicle can be useful for search and interdiction as a complement to gamma-ray detectors. 

One advantage of using gamma irradiation-induced grafting rather than plasma treatment is the ability of the y-rays to modify the bulk of the sample by penetrating deep into the samples. Consequently, it is possible to maintain the surface functionality during the degradation of the polymer. 

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