[He] Energy Diagram


Electron Impact Excitation Rate Coefficient

p\q
11S
21S
23S
21P
23P
31S
33S
31P
33P
31D
33D
41S
43S
41P
43P
41D
43P
41F
43F
51S
53S
51P
53P
51D
53D
51F
53F
61S
63S
61P
63P
61D
63D
61F
63F
71S
73S
71P
73P
71D
73D
71F
73F
81L
83L
91L
93L
101L
103L
N11
N12
N13
N14
N15
N16
N17
N18
N19
N20
11S
21S
23S
21P
23P
31S
33S
31P
33P
31D
33D
41S
43S
41P
43P
41D
43P
41F
43F
51S
53S
51P
53P
51D
53D
51F
53F
61S
63S
61P
63P
61D
63D
61F
63F
71S
73S
71P
73P
71D
73D
71F
73F
81L
83L
91L
93L
101L
103L
N11
N12
N13
N14
N15
N16
N17
N18
N19
N20


The EIE (Electron Impact Excitation) rate coefficient averaged over Maxwell-Boltzmann electron energy distribution at temperature Te is given by


Electron impact de-excitation rate coefficient is related to excitation rate coefficient