A radiation shielding composite comprising a first component including a copolymer including unconjugated olefin-derived units, vinyl aromatic-derived units, and conjugated diene-derived units; and a second component including a radiation-shielding metal.

A radiation barrier provides adjustable protection against radiation incident from multiple directions simultaneously. First and second radiation shields are pivotally retained by an axis post to form a radiation shield assembly. Each radiation shield is formed from radiation shielding material with a lead equivalence. The radiation shields have a closed configuration where the shields are disposed in a nesting relationship to a single side of the axis post with the first radiation shield disposed interior to the second radiation shield. The first radiation shield pivots in a plane laterally displaced from the center axis of the axis post by a distance D.sub.1 while the second radiation shield pivots in a plane laterally displaced from the center axis by a greater distance D.sub.2. Notches can be disposed in the proximal end portion of the first radiation shield to permit mounting brackets of the second radiation shield to be received therethrough.

A method for identifying a soil texture class of a soil using gamma analysis comprises: acquiring an inelastic neutron scattering (INS) gamma spectrum of the soil; calculating at least one ratio of a mass fraction of a first oxide to a mass fraction of a second oxide present in the soil, wherein the mass fraction of each of the first and second oxides is determined from calculating a contribution to a characteristic peak in the gamma spectrum of the soil by each oxide of the first and second oxides; and identifying one or more soil texture classes of the soil by identifying a contour line of a contour plot that corresponds to the calculated at least one ratio, wherein the contour line correlates the calculated at least one ratio to one or more soil texture classes. A mobile system for gamma analysis determination of soil texture is also provided.