Muon radiative energy loss (in 1.0E06 cm^2/g) in rubber natural [(C%5#H8)%n#] with Z/A = 0.55785 (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 0.2264 0.0966 0.4797 0.8029 5. 0.3074 0.2411 0.5069 1.0554 10. 0.3750 0.3694 0.4910 1.2354 20. 0.4469 0.5096 0.4678 1.4242 50. 0.5457 0.7063 0.4424 1.6945 100. 0.6208 0.8462 0.4300 1.8970 200. 0.6911 0.9759 0.4236 2.0906 500. 0.7756 1.1116 0.4225 2.3098 1000. 0.8305 1.1956 0.4293 2.4554 2000. 0.8762 1.2554 0.4410 2.5726 5000. 0.9225 1.3087 0.4627 2.6939 10000. 0.9475 1.3338 0.4847 2.7659 20000. 0.9652 1.3496 0.5107 2.8255 50000. 0.9807 1.3620 0.5513 2.8939 100000. 0.9875 1.3671 0.5863 2.9409