Interference of two signals with different origin:
1.
Deep interior
ω
q
q
=190 MeV
2.
Surface
ω
glue
=????
Solutions for surface oscillations:
1.
ω
glue
= 190+2×76 = 324 MeV
→ lattice
2.
ω
glue
= 190-2×76 = 38 MeV
→ giant resonances