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σ 1s σ 2s σ 2p

H + + Nb(nl=1s) → H + + Nb + + e-

Table 1 (Theory)

E, MeV σ 1s , 10 -16 cm 2
KH69 BE78 RHF [CL74] RHF [BU93]
0.03 — .8614E-15 .1267E-14 .1273E-14
0.05 — .2124E-13 .3932E-13 .3952E-13
0.07 — .1189E-12 .2306E-12 .2317E-12
0.10 — .6519E-12 .1232E-11 .1237E-11
0.15 — .3858E-11 .7087E-11 .7113E-11
0.20 — .1283E-10 .2284E-10 .2291E-10
0.30 .8243E-10 .6466E-10 .1092E-09 .1094E-09
0.50 .5838E-09 .4517E-09 .6813E-09 .6822E-09
0.70 .1736E-08 .1505E-08 .2072E-08 .2073E-08
1.0 .6013E-08 .5126E-08 .6131E-08 .6131E-08
1.5 .1943E-07 .1835E-07 .1839E-07 .1839E-07
2.0 .4274E-07 .4197E-07 .3641E-07 .3639E-07
3.0 .1217E-06 .1186E-06 .8231E-07 .8228E-07
5.0 .3559E-06 .3505E-06 .1793E-06 .1792E-06
7.0 .6195E-06 .6177E-06 .2608E-06 .2607E-06
10. .9853E-06 .9919E-06 .3572E-06 .3572E-06
15. .1469E-05 .1464E-05 .4951E-06 .4951E-06
20. .1782E-05 .1762E-05 .6329E-06 .6328E-06
30. .2058E-05 .2039E-05 .8964E-06 .8963E-06
50. .2066E-05 .2066E-05 .1246E-05 .1246E-05
70. .1891E-05 .1914E-05 .1382E-05 .1382E-05
100. .1637E-05 .1663E-05 .1398E-05 .1398E-05
150. .1316E-05 .1339E-05 .1279E-05 .1279E-05
200. .1071E-05 .1118E-05 .1142E-05 .1143E-05
300. .7986E-06 .8435E-06 .9283E-06 .9285E-06
500. — .5745E-06 .6773E-06 .6774E-06
700. — .4399E-06 .5387E-06 .5388E-06
1000. — .3306E-06 .4173E-06 .4172E-06
1500. — .2365E-06 .3087E-06 .3081E-06
2000. — .1859E-06 .2481E-06 .2470E-06

H + + Nb(nl=2s) → H + + Nb + + e-

Table 2 (Theory)

E, MeV σ 2s , 10 -16 cm 2
CH73 BE78
0.003 — .3788E-13
0.005 — .2884E-11
0.007 — .2079E-10
0.01 — .1184E-09
0.015 — .7128E-09
0.02 — .2260E-08
0.03 — .9988E-08
0.05 — .4923E-07
0.07 .1242E-06 .1161E-06
0.10 .2328E-06 .2310E-06
0.15 .3605E-06 .3600E-06
0.20 .4506E-06 .4244E-06
0.30 .1105E-05 .9603E-06
0.50 .6047E-05 .5972E-05
0.70 .1574E-04 .1558E-04
1.0 .3321E-04 .3293E-04
1.5 .5935E-04 .5879E-04
2.0 .7886E-04 .7800E-04
3.0 .9871E-04 .9817E-04
5.0 .1066E-03 .1063E-03
7.0 .1007E-03 .1011E-03
10. .8834E-04 .8978E-04
15. .7190E-04 .7376E-04
20. .5995E-04 .6233E-04
30. .4537E-04 .4789E-04
50. .3073E-04 .3321E-04
70. .2383E-04 .2577E-04
100. .1784E-04 .1944E-04

H + + Nb(nl=2p) → H + + Nb + + e-

Table 3 (Theory)

E, MeV σ 2p , 10 -16 cm 2
CH73 BE78
0.005 — .4413E-12
0.007 — .4543E-11
0.01 — .3737E-10
0.015 — .3389E-09
0.02 — .1515E-08
0.03 — .9680E-08
0.05 — .8392E-07
0.07 .4740E-06 .3071E-06
0.10 .1354E-05 .1038E-05
0.15 .3761E-05 .3486E-05
0.20 .7801E-05 .7355E-05
0.30 .1902E-04 .1836E-04
0.50 .4866E-04 .4810E-04
0.70 .8262E-04 .8202E-04
1.0 .1334E-03 .1324E-03
1.5 .2046E-03 .2038E-03
2.0 .2597E-03 .2575E-03
3.0 .3252E-03 .3239E-03
5.0 .3717E-03 .3703E-03
7.0 .3696E-03 .3703E-03
10. .3434E-03 .3465E-03
15. .2938E-03 .2990E-03
20. .2525E-03 .2594E-03
30. .1958E-03 .2039E-03
50. .1347E-03 .1437E-03
70. .1049E-03 .1122E-03
100. .7886E-04 .8527E-04