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Multiple choice
For low-energy s-wave scattering off a hard sphere of radius
a
=
1
a = 1
a
=
1
, the phase shift is
δ
0
=
−
k
a
\delta_0 = -k a
δ
0
=
−
k
a
and the partial cross section is
σ
0
=
(
4
π
/
k
2
)
sin
2
(
δ
0
)
\sigma_0 = (4\pi / k^2) \sin^2(\delta_0)
σ
0
=
(
4
π
/
k
2
)
sin
2
(
δ
0
)
. With wavenumber
k
=
0.2
k = 0.2
k
=
0.2
, what is
σ
0
\sigma_0
σ
0
?
3.10
2.48
12.57
12.40
Check answer