Results 261 to 270 of about 849,713 (290)

The PbPb collision

Nuclear Physics A, 1980
Abstract The reaction 208Pb on 208Pb was studied at bombarding energies of 7.0 and 7.57 MeV/u. One-particle inclusive measurements using a large-area position-sensitive ionisation chamber delivered the kinetic energy, charge and scattering angle of the reaction products.
T. Tanabe, R. Bock, M. Dakowski, A. Gobbi, H. Sann, H. Stelzer, U. Lynen, A. Olmi, D. Pelte   +8 more
openaire   +1 more source

Unsupported radiogenic Pb in zircon: a cause of anomalously high Pb-Pb, U-Pb and Th-Pb ages

Contributions to Mineralogy and Petrology, 1984
Ion microprobe U-Th-Pb isotopic analyses of zircons from a granodioritic orthogneiss from the Napier Complex, Mount Sones, Enderby Land, Antarctica, have identified an unambiguous example of unsupported radiogenic Pb in a 3,950 Ma-old crystal. At one 40 μm spot on the crystal an unusually large heterogeneity in Pb content was found, the concentration ...
Williams, L. S., Compston, W., Black, L. P., Ireland, T. R., Foster, J. J.   +4 more
openaire   +2 more sources

Surface electronic structure of Pb(001), Pb(110), and Pb(111)

Physical Review B, 1994
We report the results of surface electronic-structure calculations for the three low-index faces of elemental Pb. To our knowledge, these are the first calculations for the Pb(110) and Pb(111) surfaces addressing their electronic structure. The underlying bulk crystal is described by a realistic second-nearest-neighbor empirical tight-binding ...
, Würde, , Mazur, , Pollmann
openaire   +2 more sources

PbPb and UPb geochronology of carbonate rocks: an assessment

Chemical Geology, 1994
Recent application of carbonate PbPb and UPb geochronology has made an important contribution to the dating of primary deposition (strictly speaking, early diagenesis) or metamorphism of sedimentary sequences. The present article summarizes some highlights of this development, discusses the functioning of carbonate UPb and PbPb chronometers, and ...
Bor-ming Jahn, Henri Cuvellier
openaire   +1 more source