The spin and charge susceptibilities of the attractive Hubbard chain a
re obtained as a function of temperature, attractive interaction (-U)
and band-filling solving numerically the thermodynamic Bethe-ansatz eq
uations. The dominant states at low temperatures are spin-paired elect
rons (like Cooper-pairs). The spin susceptibility is vanishingly small
due to the spin gap and at half-filling it decreases with U. On the o
ther hand, the charge susceptibility at half-filling increases with U
and shows a maximum as a function of the band-filling, at constant T,
which increases as T lowers and that shifts towards smaller values of
the band-filling.