PPT Slide

G.F. Bertsch, K. Hencken and H. Esbensen, Phys. Rev. C57 (1998) 1366

6He ? 5He ? 4He+n

a ? 2 fm

11Li ? 10Li ? 9Li+n

a ? – 5 fm

The shape

of the s-wave strength

function depends on

the scattering length

The shape of the p-wave strength

(and also true for d-wave, etc.)

is closely given by a Breit-Wigner

with G=G(E) as in R-matrix theory

Strength functions (lineshapes)

for unbound nuclear systems