Table 1 Measured photodissociation branching ratios of 12C16O and 13C16O

From: Strong and selective isotope effect in the vacuum ultraviolet photodissociation branching ratios of carbon monoxide

Upper state

VUV(cm−1)

[C(3P)+O(1D)]: [C(1D)+O(3P)]: [C(3P)+O(3P)]e

 

12C16O

13C16Oa

Δνb

12C16O

13C16O

1Π(v′ = 2)

107685.8, R(0)

107596.6, R(0)

89.2

[9.5 ± 1.8]:[37.8 ± 4.0]:[52.6 ± 5.8]c

[12.5 ± 0.5]:[78.9 ± 1.1]:[8.6 ± 0.7]

(4pπ) 1Π(v′ = 2)

107523.5, R(0)

107431.7, R(0)

100.8

[11.9 ± 2.0]:[60.2 ± 3.0]:[27.9 ± 4.7]c

[10.5 ± 0.2]:[51.5 ± 0.5]:[38.0 ± 0.3]

(5pπ) 1Π(v′ = 0)

107336.8, R

107291.4, R(0)

45.4

[15.7 ± 0.1]:[22.0 ± 0.3]:[62.3 ± 0.3]c

[6.7 ± 0.4]:[48.1 ± 1.0]:[45.2 ± 1.3]

(5pσ) 1Σ+(v′ = 0)

107220.0 f

107201.3 f

18.7

[6.6 ± 0.8]:[12.3 ± 0.9]:[81.1 ± 1.6]c

[6.3 ± 0.6]:[25.3 ± 1.4]:[68.4 ± 1.9]

I 1Π

107159.0

107110.9

48.1

[2.0 ± 0.2]:[14.2 ± 1.0]:[83.8 ± 1.3]c

[0.5 ± 0.05]:[6.5 ± 0.2]:[93.0 ± 0.2]

C´1Σ+(v′ = 7)d

106882.8

106790.2

92.6

[3.0 ± 0.3]:[19.7 ± 0.6]:[77.2 ± 0.3]

[16.3 ± 0.5]:[61.7 ± 0.6]:[22.0 ± 0.3]

I′(5sσ) 1Σ+(v′ = 0)

106400.3

106362.1, R(3)

38.2

[0]:[0]:[100]

[0.7 ± 0.1]:[2.4 ± 0.1]:[96.9 ± 0.1]

  1. aThe VUV photon energies are calibrated according to the Rydberg series of Xe: 5p5(2P°1/2)ns (n = 12–17), the uncertainty should be within 1.5 cm−1
  2. bThe VUV photon energy differences between 12C16O and 13C16O, which approximately represent the energy shifts of the corresponding rovibronic states caused by the isotopic substitution of 12C by 13C
  3. cThe branching ratios are adopted from ref. 32
  4. dThe assignment of this state is according to ref. 8. It is usually labeled as 1Σ+(v′ = 2) in the community of astrophysics, for example ref. 17
  5. eThe error bars of the presented branching ratios are the standard deviations (1σ) of three independent experimental trials, which has not considered the possible uncertainties of the photoionization cross sections of C(3P) and C(1D) in ref. 38,39, see “Methods” section
  6. fThis corresponds to the position of the band head
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