and 1x10'* fast neutrons per square centim 23 for the va Fr? GQ contrioution at specific slant ran actual thermal- and fast-neutron f x actually absorbed by the soil, ani the build-up into account. Details are given in the Appendi 2.6 COMPARISON OF LASL AND ESL FILM DATA (U) A comparison of the LASL film data with the tory (ESL) film data shows that the LASL data are the ESL data. An investigation into the cause of carried out by LASL during Operation Teapot and rec: Bemis (Reference 18), who recommended that all the d D to e by 13 percent because of calibration difficulties. In comcarison vith energy-independent ion chambers, the individual emulsion results cotaines by use of the LASL holder were high by factors varying from 10 to 20 percent, and the individual emulsion results obtained by use of tne NBS holder were low by factors varying from 7 to 19 percent. The 12-rercsent calibration factor is used in this report to correzz the LASL fiim dat Describing the LASL film data in this report as uncorrected, meanc tna the data have not been corrected for neutron effects but have deen cor ted for calibration error. The individual emulsion corrections are not applied in this report, since they are applicable only at distances of 1700 to 3300 yards, and to the type of shots for which they were measured. The individual emulsion variation is assumed to be due to the energy de venience of the emulsion: the emulsions in the LASL holder are more sensit Since the gamma spectrum is softer at distances clceser to groun the correction factors should be different. Currently the averas the LASL and ESL gamma data appears to present a good estimate of the gama dose. (U) An example of the calculations used to obtain the correctio: factors is presented in the Appendix. Formulae for correcting the to other air densities are also presented in the Appendix. (U) All shot information was obtained from References 19 ard 20. 27 mM 3 ot oO «at Unless otherwise specified, the meteorological data were obtained at level. The meteorological data tables include slan -range-corre 7 vion factors and dose-correction factors as well as m ratur®, pressure, ant density values.