Figure 5

Central axis thermal neutron flux distribution inside a water phantom for the standard collimator, 5 cm extended collimator and the standard collimator with a 5 cm air gap between the collimator and the phantom.

Central axis thermal neutron flux distribution inside a water phantom for the standard collimator, 5 cm extended collimator and the standard collimator with a 5 cm air gap between the collimator and the phantom.