In this work, neutron measurements were carried out for the interaction of 60 and 67.5 MeV ¹²C, 57.3 and 65 MeV ¹³C ions with thick aluminium target by using CR-39 detectors and neutron rem meter. Both the detector systems were irradiated at different angles viz. 0°, 300, 60°, 90° with respect to the beam direction. The normalized track density (tracks cm-² projectile-¹ at 1 m) in CR-39 detectors was correlated with the normalized dose equivalent values (μSv projectile-¹ at 1 m) obtained using the neutron rem meter. The track dCnsity was found to be more in case of ¹³C than ¹²C. However in all the cases, the track density per incident projectile was found to decrease as the angle with respect to beam direction increases, indicating non-isotropic nature of neutron emission. The ratio between measured dose equivalent in rem meter to the measured track densities in CR-39 detectors was found to be (2.8±O.2) μSV cm², which remains constant irrespective of the change in angle with respect to the beam direction as well as in neutron energy distribution, indicating a flat dose response of CR-39 detectors.