$n\to 2n$

NCO₀

NCO₁

NCO₂

NCO₃

$20\to 40$

5.9503

4.1493

3.1838

2.0093

$40\to 80$

5.8033

4.0798

3.0517

2.0048

$80\to 160$

5.3937

4.7077

3.0133

2.0949

理论值

5

4

3

2