− α n
θ n ( min )
n
calc
meas
1
5.43 ± 0.02
5.5 ± 0.1
10.87 ± 0.03
10.93 ± 0.02
2
10.91 ± 0.03
11.1 ± 0.2
21.83 ± 0.07
21.89 ± 0.04
3
16.50 ± 0.05
16.6 ± 0.3
33.00 ± 0.10
33.14 ± 0.03
4
22.25 ± 0.07
22.5 ± 0.2
44.51 ± 0.14
44.68 ± 0.02
5
28.25 ± 0.09
28.6 ± 0.2
56.51 ± 0.18
56.75 ± 0.02