Results are reported from the complete salt phase of the Sudbury Neutrino Observatory experiment in which NaCl was dissolved in the

{}^{2}H

_{2} O

(“

D_{2} O

”) target. The addition of salt enhanced the signal from neutron capture as compared to the pure

D_{2} O

detector. By making a statistical separation of charged-current events from other types based on event-isotropy criteria, the effective electron recoil energy spectrum has been extracted. In units of

10^{6} {cm}^{- 2} s^{- 1}

, the total flux of active-flavor neutrinos from

{}^{8}B

decay in the Sun is found to be

{4.94}_{- 0.21}^{+ 0.21} {(stat)}_{- 0.34}^{+ 0.38} (syst)

and the integral flux of electron neutrinos for an undistorted

{}^{8}B

spectrum is

{1.68}_{- 0.06}^{+ 0.06} {(stat)}_{- 0.09}^{+ 0.08} (syst)

; the signal from (

ν_{x}, e

) elastic scattering is equivalent to an electron-neutrino flux of

{2.35}_{- 0.22}^{+ 0.22} {(stat)}_{- 0.15}^{+ 0.15} (syst)

. These results are consistent with those expected for neutrino oscillations with the so-called large mixing angle parameters and also with an undistorted spectrum. A search for matter-enhancement effects in the Earth through a possible day-night asymmetry in the charged-current integral rate is consistent with no asymmetry. Including results from other experiments, the best-fit values for two-neutrino mixing parameters are

Δ m^{2} = ({8.0}_{- 0.4}^{+ 0.6}) \times 10^{- 5}

^{2}

and

θ = 33 . 9_{- 2.2}^{+ 2.4}

degrees.

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