in the present research, we want to simulate the fission process of the excited nucleus 207at produced in fusion reaction 19f+188os in the framework of the modified statistical model with considering the effects of projection of spin about the symmetry axis, k, and temperature. in our simulation, we calculate the fission cross section and anisotropy of the fission fragment angular distribution ...

The provenance of Early Cretaceous sandstones dredged on the northern margin Demerara Plateau, offshore French Guiana and Suriname, reveals sediment routing system that prevailed through Equatorial Atlantic rifting. Fission-track analysis U–Pb dating 310 111 detrital zircons, respectively, have been performed. Microfacies inherited cooling ages suggest were deposited in shallow marine environme...

In this work, we describe a new method for parallelizing the source iterations in a Monte Carlo criticality calculation. Instead of having one global fission bank that needs to be synchronized as is traditionally done, our method has each processor keep track of a local fission bank while still preserving reproducibility. In doing so, it is required to send only a limited set of fission bank si...

In geological minerals, tracks of fragments from spontaneous fission of U nuclei accumulate over geological time scales and are widely used for fission-track dating and thermochronology [1, 2]. In our recent studies, we tackled the problem how solids exposed to energetic heavy ions cope with the simultaneous exposure of external pressure. This combination of ion irradiation and pressure is suit...

A unified framework for automatic non-rigid 3D-3D and 3D-2D registration of medical images with static and dynamic deformations is proposed in this paper. The problem of non-rigid image registration is approached as a classical state estimation problem using a generic deformation model for the soft tissue. The registration technique employs a dynamic linear elastic continuum mechanics model of ...

Single-grain measurements become common practice in fission track, Ar / Ar, U-Pb, (U-Th)/He and optical dating. Because single-grain signals are small, the measurement uncertainties of single-grain ages are typically larger and more variable than those of multi-grain aliquots of the same sample. Invented by Rex Galbraith in 1988, the radial plot is a graphical method for comparing several estim...

In many dielectrics, swift heavy ions of MeV-GeV energy produce tracks of a few nm in diameter. The track morphology depends on energy loss (dE/dx), particularly the formation of a continuous damage trail requires a critical (dE/dx)c. Below this threshold, chemical etching of discontinuous tracks exhibits inhomogeneous pore sizes and the track etching efficiency drops below unity. In the recent...