Muon radiative energy loss (in 1.0E06 cm^2/g) in brain (ICRP) with Z/A = 0.55423 (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 0.2843 0.1249 0.4706 0.8798 5. 0.3858 0.3088 0.4982 1.1927 10. 0.4697 0.4666 0.4832 1.4195 20. 0.5582 0.6382 0.4608 1.6572 50. 0.6786 0.8798 0.4364 1.9948 100. 0.7681 1.0505 0.4244 2.2431 200. 0.8536 1.2077 0.4183 2.4796 500. 0.9545 1.3692 0.4173 2.7410 1000. 1.0192 1.4679 0.4240 2.9111 2000. 1.0729 1.5374 0.4353 3.0456 5000. 1.1267 1.5986 0.4565 3.1819 10000. 1.1553 1.6275 0.4780 3.2610 20000. 1.1756 1.6458 0.5033 3.3247 50000. 1.1931 1.6602 0.5429 3.3962 100000. 1.2014 1.6661 0.5769 3.4445