From objectives: This report demonstrates the concept of hydrogeochemical sampling to be used in the 12-state region for which UCC-ND has the responsibility if surveying as part of the NURE. The results of a geochemical survey at two sample spacings in the Crystal City Quadrangle in south Texas are presented.

Abstract: "Photographic plates have been used to measure the energy of neutrons from the fission of 25. The spectrum as inferred from the ranges of 850 protons recoiling in the forward direction shows a very wide maximum at ~1.5 Mev with an exponentially decreasing high energy tail which extends beyond 7 Mev. The minimum energy neutrons recorded were ~700 kv. If the spectrum is extrapolated to zero, one finds that this average neutron energy is about 1.85 Mev. The stopping power of the plates was calibrated by the use of monochromatic neutrons from the Li-7(pn) Be-7 reaction and the d-d reaction."

The energy distributions of neutrons in the 3-10 Mev energy range resulting from the bombardment of thin U targets are being investigated by the measurement of proton recoils in photographic plates.

Data collected as part of a uranium geochemical survey in the Crystal City and Beeville Quadrangles in Texas including laboratory data stream sediments and water, well water, and botanical samples for phase 1 (pp. 1-8); for phase 2 including the same with lake samples (pp 9-36); well water samples only for phase G (p. 37); and field data for all phases (pp. 38-374).