Determination of 4.438 MeV gamma-ray to neutron emission ratio from a (241)Am-(9)Be neutron source. 
Gamma-ray (gamma-ray) spectra of a 1.49 x 10(11)Bq (241)Am-(9)Be source and background were measured using a 2 in x 2 in, NaI(Tl) detector.  Backgrounds due to the neutron interactions and energy deposition were calculated with MCNP4C. By subtracting the backgrounds from the experimental spectra, the S(gamma) is obtained and the R=S(gamma)/S(n) was estimated.  The final result of R=S(gamma)/S(n)=0.596 is in agreement with result reported in literature.