APPENDIX (U) The following example of the calculations that are necessary to correct the gamma dose data, is taken from the Shot Hood (Operation Piumbbob * at 1119 yards slant range. 1. To obtain the gold-neutron correction the thermal-neutron sensitivity of the 548 film (Table 2.3) is divided into the gold-neutron flux: 3.59x10°? n/em® (\ “ts=kn)2. 88x10? (n/em® )/r = 4o7.6r = 408r ADL To obtain the fast-neutron correction, the fast-neutron sensitivity of the 548 film (Table 2.3) at 1 MeV is divided into the total fast-neutron flux as represented by the Pu neutron flux: 1.04x10° n/cn?® = 3586r = 3590 EE 29x10? (n/em®* )/r . 70% (U) Since the fast-neutron sensitivity for the 548 film was obtained from a fission-neutron spectrum of average energy of 1 MeV in order to correct the film for fast-neutron effects, the averagé neutron energy of the particular shot must be assumed to be close to 1 MeV. For those films which have neutron sensitivities reported for a number of fast-neutron energies, the neutron sensitivity at 1 MeV is divided into the Pu-U flux, the neutron sensitivity at 2 MeV is divided sensitivity at 4 MeV is divided the neutron and these resiilts are summed to obtain the total fasteneutron correction. (S-RD) 3. To obtain the shield (Emmett) correction, the gamma dose value for a thermal flux of 1x10'* n/en® in Table 2.4 is multiplied by the gold-neutron flux divided by 1x10°? n/en® ; the gamma dose value for the 0.63 to 1.5 MeV interval is multiplied by the Np-U flux divided by 1x10 n/om: the gamma dose value for the, 1.5 to 3.0 MeV interval is multiplied the gamma dose value for over eel