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σ 1s σ 2s σ 2p σ 3s σ 3p σ 3d

H + + Pa(nl=1s) → H + + Pa + + e-

Table 1 (Theory)

E, MeV σ 1s , 10 -16 cm 2
BE78
0.30 .3877E-15
0.50 .4991E-14
0.70 .2352E-13
1.0 .1067E-12
1.5 .5806E-12
2.0 .1831E-11
3.0 .8814E-11
5.0 .5669E-10
7.0 .1819E-09
10. .5654E-09
15. .1863E-08
20. .3939E-08
30. .9775E-08
50. .2361E-07
70. .3584E-07
100. .4900E-07
150. .5972E-07
200. .6299E-07
300. .6103E-07
500. .5091E-07
700. .4243E-07
1000. .3360E-07
1500. .2505E-07
2000. .2003E-07
3000. .1445E-07
5000. .9405E-08
7000. .7075E-08

H + + Pa(nl=2s) → H + + Pa + + e-

Table 2 (Theory)

E, MeV σ 2s , 10 -16 cm 2
BE78
0.02 .9821E-17
0.03 .2206E-14
0.05 .7840E-13
0.07 .4449E-12
0.10 .2414E-11
0.15 .1336E-10
0.20 .4153E-10
0.30 .1799E-09
0.50 .9355E-09
0.70 .2281E-08
1.0 .4764E-08
1.5 .7838E-08
2.0 .9429E-08
3.0 .2175E-07
5.0 .1543E-06
7.0 .4038E-06
10. .8288E-06
15. .1384E-05
20. .1699E-05
30. .1909E-05
50. .1777E-05
70. .1551E-05
100. .1279E-05
150. .9840E-06
200. .8024E-06
300. .5900E-06
500. .3942E-06
700. .2981E-06
1000. .2213E-06
1500. .1563E-06
2000. .1219E-06

H + + Pa(nl=2p) → H + + Pa + + e-

Table 3 (Theory)

E, MeV σ 2p , 10 -16 cm 2
BE78
0.015 .2243E-18
0.02 .1523E-16
0.03 .8382E-15
0.05 .3093E-13
0.07 .2332E-12
0.10 .1716E-11
0.15 .1385E-10
0.20 .5578E-10
0.30 .3504E-09
0.50 .2906E-08
0.70 .1016E-07
1.0 .3368E-07
1.5 .1097E-06
2.0 .2275E-06
3.0 .5557E-06
5.0 .1419E-05
7.0 .2362E-05
10. .3669E-05
15. .5318E-05
20. .6359E-05
30. .7296E-05
50. .7283E-05
70. .6642E-05
100. .5659E-05
150. .4448E-05
200. .3647E-05
300. .2687E-05
500. .1780E-05
700. .1344E-05
1000. .9934E-06
1500. .7001E-06
2000. .5444E-06

H + + Pa(nl=3s) → H + + Pa + + e-

Table 4 (Theory)

E, MeV σ 3s , 10 -16 cm 2
JO79
0.005 .1202E-11
0.007 .4324E-11
0.01 .1635E-10
0.015 .7060E-10
0.02 .1907E-09
0.03 .7031E-09
0.05 .2853E-08
0.07 .5690E-08
0.10 .8960E-08
0.15 .1236E-07
0.20 .2677E-07
0.30 .1231E-06
0.50 .3737E-06
0.70 .5176E-06
1.0 .1074E-05
1.5 .3823E-05
2.0 .7878E-05
3.0 .1582E-04
5.0 .2501E-04
7.0 .2814E-04
10. .2828E-04
15. .2551E-04
20. .2253E-04
30. .1798E-04
50. .1283E-04
70. .1004E-04
100. .7624E-05
150. .5503E-05
200. .4340E-05
300. .3089E-05
500. .2005E-05
700. .1502E-05
1000. .1100E-05
1500. .7708E-06
2000. .5987E-06

H + + Pa(nl=3p) → H + + Pa + + e-

Table 5 (Theory)

E, MeV σ 3p , 10 -16 cm 2
JO79
0.003 .6191E-13
0.005 .7890E-12
0.007 .3937E-11
0.01 .2094E-10
0.015 .1329E-09
0.02 .4680E-09
0.03 .2524E-08
0.05 .1683E-07
0.07 .4926E-07
0.10 .1272E-06
0.15 .2954E-06
0.20 .4838E-06
0.30 .9898E-06
0.50 .3000E-05
0.70 .6558E-05
1.0 .1430E-04
1.5 .3050E-04
2.0 .4705E-04
3.0 .7440E-04
5.0 .1039E-03
7.0 .1153E-03
10. .1167E-03
15. .1073E-03
20. .9609E-04
30. .7811E-04
50. .5679E-04
70. .4485E-04
100. .3448E-04
150. .2510E-04
200. .1995E-04
300. .1432E-04
500. .9472E-05
700. .7054E-05
1000. .5194E-05
1500. .3654E-05
2000. .2853E-05

H + + Pa(nl=3d) → H + + Pa + + e-

Table 6 (Theory)

E, MeV σ 3d , 10 -16 cm 2
JO79
0.003 .1607E-14
0.005 .3164E-13
0.007 .2248E-12
0.01 .1756E-11
0.015 .1727E-10
0.02 .8443E-10
0.03 .7502E-09
0.05 .9639E-08
0.07 .4631E-07
0.10 .2134E-06
0.15 .9985E-06
0.20 .2582E-05
0.30 .8007E-05
0.50 .2233E-04
0.70 .3806E-04
1.0 .6049E-04
1.5 .9705E-04
2.0 .1320E-03
3.0 .1908E-03
5.0 .2614E-03
7.0 .2933E-03
10. .3026E-03
15. .2840E-03
20. .2569E-03
30. .2104E-03
50. .1511E-03
70. .1182E-03
100. .8955E-04
150. .6440E-04
200. .5070E-04
300. .3638E-04
500. .2333E-04
700. .1739E-04
1000. .1276E-04
1500. .8957E-05
2000. .6929E-05