[en] Positive ion accelerators have gamma and neutrons as prompt radiation. Though neutron yield is less but due to high energy and penetrability it becomes of concern for radiation protection. The information however is important for radiation protection practices. In radiation therapy, the secondary particles generated during the treatment are anticipated to further interact with the surrounding tissues and is now found to be a cause for manifestation of latent cancer. The study of the secondary particle yield is thus critical in heavy ion treatment planning. Since heavy ions, (particularly carbon) are being widely used in therapy, such information becomes important. Also, the data available on neutron yield from heavy ion interaction in thick targets is limited. This work discusses the integrated neutron yield with its angular distribution and integrated dose from thick Al and C targets bombarded by C with kinetic energy ∼ 10 MeV/A and F projectiles at ∼ 7.6 MeV/A on thick Al target. The energy integrated yields from the different target projectile systems is compared and presented