Component

BE (eV)

FWHM (eV)

Assignment

1

159.29 ± 0.12

2.72 ± 0.09

Bi³⁺ 4f7/2

2

164.53 ± 0.10

2.74 ± 0.10

Bi³⁺ 4f5/2

3

157.37 ± 0.32

2.68 ±0.07

Bi^o 4f7/2

4

162.66 ± 0.31

2.59 ± 0.07

Bi^o 4f5/2