Table IV.

Cross sections σ_ri (10⁻¹⁷ cm²) for electronic excitations of cytosine by electron impact at different energies E₀(eV).

	Electronic states
E0	1 3A′	2 3A′	2 1A′	1 1A″	3 1A′	4 1A′	5 1A′	6 1A′	I1	I2	I3	I4
5	0.76	3.62	1.42
6	1.84	4.94	10.36	0.15	5.33
7	0.89	2.85	10.42	0.38	12.65	7.33
8	0.67	1.65	8.08	0.31	9.48	17.87	6.47	1.08
9	0.45	1.39	7.20	0.11	7.37	14.31	4.81	14.56	1.70
10	0.35	0.98	6.10	0.23	6.88	12.31	3.23	16.37	10.31	4.30
11	0.24	0.58	4.92	0.06	5.23	11.70	2.85	12.62	12.86	6.05	8.24	3.05
12	0.14	0.62	4.24	0.12	4.16	9.24	3.15	11.26	10.71	5.25	10.18	18.69
13	0.19	0.58	3.80	0.05	3.51	7.75	2.34	9.08	6.73	1.41	1.85	71.09
14	0.16	0.48	3.08	0.06	2.91	6.06	1.67	6.95	5.22	1.85	1.57	58.95
15	0.07	0.46	2.52	0	2.10	4.81	1.32	4.99	3.98	1.11	1.34	47.39
16	0.01	0.40	2.14	0.01	1.87	3.84	1.06	3.91	2.87	0.90	0.60	36.72
17	0.02	0.32	1.79	0	1.70	3.36	0.89	3.35	2.35	0.84	0.42	27.36
18	0	0.30	1.56	0	1.62	2.96	0.97	3.04	2.10	0.61	0.67	21.98

Gaussian distributions: 1³A′ at 3.55(0.37) eV, 1³A′ at 4.02(0.51) eV, 2¹A at 4.65(0.68) eV, 1¹A″ at 5.01(0.15) eV, 3¹A′ at 5.39(0.81) eV, 4¹A′ at 6.18(1.04) eV, 5¹A′ at 6.83(0.73) eV, 6 ¹A′ at 7.55(1.30) eV, I₁ at 8.55(1.18) eV_, I_2, at 9.21(0.83) eV, I₃ at 9.83(0.93) eV_, and I₄ at 11.53(3.91) eV. The values within parentheses are the FWHM of the Gaussians.