rged particles onsible for lower hambers. > Lanning with entical thin ively, to the If both io of ion stigating .65 - 1.70 to explain t this value. in all iscrepancy though however, h a thickand is worthy being used tudies.** rates for based on is apparently te from a calculation the incident tributions various urce calculating the body. only by time chine time a few rgies. In jated the r a point ferent densities, It has been assumed for the distributed source cons 1dereq in our methods, however, that such an effect is not important. It would be interesting to theoretically verify this assumption. We are therefore attempting to develop new approximate methods or modify existing methods to predict the angular distributions and energy spectra for various source distributions for a two media geometry such as the earth-air situation. Such methods would be useful not only for environmental gamma radiation problems but also for solving general shielding problems.

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