Muon radiative energy loss (in 1.0E06 cm^2/g) in thorium (Th) with Z = 90, A = [232.0377(4)] (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 2.0665 0.3212 0.3589 2.7466 5. 2.8718 1.9386 0.3831 5.1934 10. 3.5299 3.1965 0.3757 7.1020 20. 4.2054 4.3520 0.3624 8.9198 50. 5.0885 6.1232 0.3476 11.5593 100. 5.7156 7.2895 0.3406 13.3457 200. 6.2866 8.3207 0.3374 14.9446 500. 6.9255 9.2625 0.3376 16.5255 1000. 7.3088 9.7599 0.3428 17.4115 2000. 7.6058 10.1173 0.3510 18.0741 5000. 7.8803 10.4164 0.3660 18.6626 10000. 8.0155 10.5534 0.3809 18.9498 20000. 8.1049 10.6437 0.3982 19.1468 50000. 8.1786 10.7102 0.4252 19.3140 100000. 8.2112 10.7378 0.4483 19.3973