LASL batch sorption methodology was used to obtain data on granite, argillite, and tuff samples. Effects of solution-to-solid ratio, isotope concentration, atmosphere, and mineralogy were investigated for the elements strontium, cesium, barium, cerium, europium, technetium, uranium, plutonium, and americium. A circulating system was used in making sorption measurements for comparison with conventional batch techniques. The mineralogy of several tuff, granite, and argillite samples was studied and compared with sorption ratios. A significant correlation between sorption of strontium, cesium, and barium and major rock phases was observed.

The interactions of a quartz monzonite, an argillite, an alluvium, and several tuffs with various radionuclides in selected phreatic waters has been studied. The sorption-desorption behavior of Sr, Tc(VII), Cs, Ba, Ce, Eu, U(VI), Pu, and Am under ambient and 70°C temperature conditions has been measured.

Distribution coefficients were determined for sorption--desorption of radionuclides between each of three different types of tuff from drill hole J-13 at the Nevada Test Site and water from that well. The measurements were performed under atmospheric conditions at 22{sup 0}C and 70{sup 0}C. Sorption ratios vary greatly with lithologic variety of tuff. A tuff high in zeolite minerals has high sorption ratios (in decreasing order) for Eu, Ba, Cs, and Am and intermediate ratios for Sr and Pu. A tuff high in glass shows very high ratios for Ba, Sr, and Cs, intermediate values for Am and Pu, and low values for Ce and Eu. A devitrified tuff similar mineralogically to a microgranite exhibits intermediate values for Ba, Cs, Am, and Pu and low values for Eu, Ce, and Sr. Values for Ru are low, and those for Mo, Sb, and I are very low or zero for the three types. 34 figures, 32 tables.

The experimental results from the various reaction and radioactive decay studies leading to nuclides in the A = 159 mass chain have been reviewed. Nuclides ranging from Pm (Z = 61) through Os (Z = 74) are included. These data are summarized and presented, together with adopted level schemes and properties. This work supersedes the previous evaluation of the data on these nuclides (2003He11).

The neutron-rich radionuclide /sup 178/Yb has been produced by the (t. p) ns. The products of the bombardment were radiochemically separated by an ion- ehchange column procedure. The decay of 74 plus or minus 3-min /sup 178/ Yb includes a 42.4-keV gamma transition as well as 348.4- and 390.8-keV transitions which deexcite a 390.8-keV /sup 178/Lu level that is populated from / sup 178/Yb by a 0.25 plus or minus 003-MeV BETA transition. The total disintegration energy of /sup 178/Yb is therefore 0.64 plus or minus 0.03 MeV. The 28.4 plus or minus 0 2-min- /sup 178/Lu ground state, which is the sole daughter of /sup 178/Yb, de cays strongly to the 0+ and 2+ members of the /sup 178/Hf ground-state band and also to /sup 178/Hf excited states at 1260.0, 1309.9, 1323.0, 1362.4, 1434.0, 0.4-min high-spin isomer of /sup 178/Lu was produced in the bombardments only via the (t, n) reaction. The isomer undergoes BETA decay to in /sup 178/ Lu was observed. (auth)

The neutron-rich radionuclide $^{178}\mathrm{Yb}$ has been produced by the ($t,p$) reaction in the bombardment of enriched $^{176}\mathrm{Yb}$ with 12-MeV tritons. The products of the bombardment were radiochemically separated by an ion-exchange column procedure. The decay of 74 \ifmmode\pm\else\textpm\fi{} 3-min $^{178}\mathrm{Yb}$ includes a 42.4-keV $\ensuremath{\gamma}$ transition as well as 348.4- and 390.8-keV transitions which deexcite a 390.8-keV $^{178}\mathrm{Lu}$ level that is populated from $^{178}\mathrm{Yb}$ by a 0.25 \ifmmode\pm\else\textpm\fi{} 0.03-MeV $\ensuremath{\beta}$ transition. The total disintegration energy of $^{178}\mathrm{Yb}$ is therefore 0.64 \ifmmode\pm\else\textpm\fi{} 0.03 MeV. The 28.4 \ifmmode\pm\else\textpm\fi{} 0.2-min-$^{178}\mathrm{Lu}$ ground state, which is the sole daughter of $^{178}\mathrm{Yb}$, decays strongly to the ${0}^{+}$ and ${2}^{+}$ members of the $^{178}\mathrm{Hf}$ ground-state band and also to $^{178}\mathrm{Hf}$ excited states at 1260.0, 1309.9, 1323.0, 1362.4, 1434.0, 1443.8, 1496.1, 1513.7, 1561.2, 1566.8, 1772.0, and 1818 keV. A 22.7 \ifmmode\pm\else\textpm\fi{} 0.4-min high-spin isomer of $^{178}\mathrm{Lu}$ was produced in the bombardments only via the ($t,n$) reaction. This isomer undergoes $\ensuremath{\beta}$ decay to 1147-(86%) and 1478-(14%) keV states in $^{178}\mathrm{Hf}$. No isomeric transition in $^{178}\mathrm{Lu}$ was observed.[RADIOACTIVITY $^{178}\mathrm{Yb}$ from $^{176}\mathrm{Yb}$ ($t,p$), measured ${T}_{\frac{1}{2}}$, ${E}_{\ensuremath{\beta}}$, ${E}_{\ensuremath{\gamma}}$, ${I}_{\ensuremath{\gamma}}$, $\ensuremath{\beta}\ensuremath{-}\ensuremath{\gamma}$ coinc; deduced $log\mathrm{ft}$, $Q$. $^{178}\mathrm{Lu}$-deduced levels, $J$, $\ensuremath{\pi}$. $^{178}\mathrm{Lu}^{g}$ from $^{178}\mathrm{Yb}$ $\ensuremath{\beta}$ decay, measured ${T}_{\frac{1}{2}}$, ${E}_{\ensuremath{\beta}}$, ${E}_{\ensuremath{\gamma}}$, ${I}_{\ensuremath{\gamma}}$, $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coin; deduced $log\mathrm{ft}$, $Q$. $^{178}\mathrm{Lu}^{m}$ from $^{176}\mathrm{Yb}(t,n)$, measured ${T}_{\frac{1}{2}}$, ${E}_{\ensuremath{\gamma}}$, ${I}_{\ensuremath{\gamma}}$. $^{178}\mathrm{Hf}$-deduced levels, $J$, $\ensuremath{\pi}$. Ge(Li) detectors, enriched target, ${E}_{t}=12$ MeV.]

The radiations associated with the β-decay of 4.96 h 243Pu have been studied with Ge(Li) and Si(Li) detectors and krypton- and xenon-filled proportional counters. Conversion electron lines of the more intense γ-transitions have been measured and tentative multipolarities have been assigned. A decay scheme incorporating some 20 γ-transitions is presented. The Nilsson assignments of 72+[624] for 243Pu and 52−[523] for 243Am are substantiated by the present data. The total β-disintegration energy of 243Pu is 580 ± 10 keV.