Pencil beam kernel-based dose calculations on CT data for a mixed neutron-gamma fission field applying tissue correction factors.

For fast neutron therapy with mixed neutron and gamma radiation at the fission neutron therapy facility MEDAPP at the research reactor FRM II in Garching, no clinical dose calculation software was available in the past. Here, we present a customized solution for research purposes to overcome this lack of three-dimensional dose calculation.The applied dose calculation method is based on two sets of decomposed pencil beam kernels for neutron and gamma radiation.

Plasmachemical Syntheses of RuF, RhF, and PtF.

Starting from the respective metal , we have synthesized the hexafluorides F of = Ru, Rh, and Pt by the use of a laser-based heating system and a remote fluorine plasma source using a mixture of Ar and NF as the feed gas. The formation of the hexafluorides was confirmed by several different spectroscopic methods, including IR, Raman, UV/vis, and NMR spectroscopy. In addition, we present first experimental hints that RuF is more reactive than PtF, because RuF is able to oxidize lower fluorides of platinum to PtF.