The traveler presented a paper entitled Susceptibility of Asian Ecosystems to Soil-Mediated Acid Rain Damage'' at the Second Workshop on Acid Rain in Asia. The workshop was organized by the Asian Institute of Technology (Bangkok, Thailand), Argonne National Laboratory (Argonne, Illinois), and Resource Management Associates (Madison, Wisconsin) and was sponsored by the US Department of Energy, the United Nations Environment Program, the United Nations Economic and Social Commission for Asia and the Pacific, and the World Bank. Papers presented on the first day discussed how the experience gained with acid rain in North America and Europe might be applied to the Asian situation. Papers describing energy use projections, sulfur emissions, and effects of acid rain in several Asian countries were presented on the second day. The remaining time was allotted to discussion, planning, and writing plans for a future research program.

p-Process modeling of some rare but stable proton-rich nuclei requires knowledge of a variety of neutron, charged particle, and photonuclear reaction rates at temperatures of 2 to 3 {times} 10{sup 9} {degrees}K. Detailed balance is usually invoked to obtain the stellar photonuclear rates, in spite of a number of well-known constraints. In this work we attempt to calculate directly the stellar rates for ({gamma},n) and ({gamma},{alpha}) reactions on {sup 151}Eu. These are compared with stellar rates obtained from detailed balance, using the same input parameters for the stellar (n,{gamma}) and ({alpha},{gamma}) reactions on {sup 150}Eu and {sup 147}Pm, respectively. The two methods yielded somewhat different results, which will be discussed along with some sensitivity studies. 16 refs., 7 figs.

We are closing chapter one'' of the nuclear age. Whatever happens to the Soviet Union and to Europe, some of the major determinants of nuclear policy will not be what they have been for the last forty-five years. Part of the task for US nuclear weapons policy is to adapt its nuclear forces and the oganizations managing them to the present, highly uncertain, but not urgently competitive situation between the US and the Soviet Union. Containment is no longer the appropriate watchword. Stabilization in the face of uncertainty, a more complicated and politically less readily communicable goal, may come closer. A second and more difficult part of the task is to deal with what may be the greatest potential source of danger to come out of the end of the cold war: the breakup of some of the cooperative institutions that managed the nuclear threat and were created by the cold war. These cooperative institutions, principally the North Atlantic Treaty Organization (NATO), the Warsaw Pact, the US-Japan alliance, were not created specifically to manage the nuclear threat, but manage it they did. A third task for nuclear weapons policy is that of dealing with nuclear proliferation under modern conditions when …

This report covers the activity of the traveler participating in a workshop entitled The 13th Werner Brandt Workshop on the Interaction of Charged Particles with Solids and conducting collaborative research with two physicists at Tokyo University. The Werner Brandt Workshops are organized by members of the traveler's group, led by Dr. R. H. Ritchie, with advice from an international committee. The traveler participated in planning for the next in the series of workshops, which will be held in or near the traveler's home base. Oak Ridge, Tennessee, in early 1992. He interacted with scientists from Japan, Spain, USSR, Israel, and other countries, initiated plans for a new collaboration with a Japanese scientist, and renewed existing collaborations, At Tokyo University, the traveler performed collaborative research with Professors Y. Yamazaki and K. Komaki on two topics of importance to the traveler's programs with the Department of Energy (DOE).

All components related to the nitrogen storage dewar were included. Pipe failures were excluded. Instrument air valves and components were excluded. See the 'What if' analysis for consequences from loss of instrument air.

The structural characteristics of (111) twist boundaries in gold are investigated using a combination of x-ray diffraction and computer modeling techniques. Comparison of the measured scattering effects with those generated from EAM computer models reveals that the (111) boundary displacement field is weak, rotational in form and centered on O' lattice sites. Furthermore, the measured intensities of the strong O' lattice reflections decrease smoothly with increasing boundary angle up to 30{degree}, as calculated from the model. The effect of double positioning on the diffraction pattern and the structural analysis is discussed. 9 refs., 2 figs.