Methane ion (CH4+) Energy (eV) BEB (A^2) 22.08 0.000 22.50 0.004 23.00 0.009 23.50 0.013 24.00 0.018 26.00 0.061 28.00 0.135 30.00 0.208 32.00 0.278 34.00 0.345 36.00 0.418 38.00 0.486 40.00 0.550 45.00 0.688 50.00 0.801 55.00 0.892 60.00 0.964 65.00 1.023 70.00 1.069 75.00 1.105 80.00 1.134 85.00 1.157 90.00 1.173 95.00 1.186 100.00 1.195 105.00 1.201 110.00 1.204 115.00 1.205 120.00 1.205 125.00 1.203 130.00 1.199 135.00 1.195 140.00 1.190 145.00 1.184 150.00 1.177 160.00 1.163 170.00 1.147 180.00 1.130 190.00 1.112 200.00 1.095 210.00 1.077 220.00 1.059 230.00 1.042 240.00 1.025 250.00 1.008 300.00 0.929 350.00 0.860 400.00 0.800 450.00 0.748 500.00 0.702 550.00 0.662 600.00 0.626 650.00 0.594 700.00 0.566 750.00 0.540 800.00 0.517 850.00 0.495 900.00 0.476 950.00 0.458 1000.00 0.441 1100.00 0.412 1200.00 0.386 1300.00 0.364 1400.00 0.344 1500.00 0.326 1600.00 0.310 1700.00 0.296 1800.00 0.283 1900.00 0.272 2000.00 0.261 2100.00 0.251 2200.00 0.242 2300.00 0.234 2400.00 0.226 2500.00 0.218 2600.00 0.212 2700.00 0.205 2800.00 0.199 2900.00 0.194 3000.00 0.189 4000.00 0.149 5000.00 0.124