31. It involves mass rearing of insects in large factories and sterilising them with gamma radiation . 32. Nuclear logging was initially developed to measure the natural gamma radiation emitted by underground formations. 33. Could this go all the way to gamma radiation ? 34. The gamma radiation from positron annihilation consists of high energy photons, and is also ionizing. 35. From the levels of gamma radiation observed, astronomers knlast. 36. The gamma radiation may come from sprites and blue jets, although direct proof is lacking. 37. Sterns worked as a janitor in Boise, Idaho when he was exposed to gamma radiation . 38. To ascertain the amount of water in the snow, water officials sometimes employ gamma radiation . 39. Substantial effort and progress in reducing fiber detector sensitivity to gamma radiation has been made. 40. Uranium workers are routinely exposed to low levels of radon decay products and gamma radiation .
