Muon radiative energy loss (in 1.0E06 cm^2/g) in polonium (Po) with Z = 84, A = [208.98243(2)] (f12.0,4f12.4) E (GeV) b_brem b_pair b_nucl b_total 2. 2.0210 0.3977 0.3626 2.7812 5. 2.8044 1.9688 0.3872 5.1604 10. 3.4440 3.1894 0.3797 7.0131 20. 4.1003 4.3183 0.3614 8.7801 50. 4.9586 6.0423 0.3512 11.3520 100. 5.5683 7.1794 0.3440 13.0917 200. 6.1241 8.1862 0.3407 14.6511 500. 6.7469 9.1073 0.3409 16.1951 1000. 7.1211 9.5945 0.3462 17.0618 2000. 7.4116 9.9449 0.3545 17.7110 5000. 7.6805 10.2385 0.3696 18.2886 10000. 7.8133 10.3731 0.3847 18.5711 20000. 7.9011 10.4617 0.4022 18.7651 50000. 7.9737 10.5272 0.4296 18.9305 100000. 8.0058 10.5545 0.4530 19.0133