Learn More
A new quasi-monoenergetic neutron beam facility has been constructed at The Svedberg Laboratory (TSL) in Uppsala, Sweden. Key features include a neutron energy range of 11-175 MeV, high fluxes, user flux control, flexible neutron field size and shape, and spacious and easily accessible user area. The first results of the beam characterisation measurements(More)
—An extended version of the Cascade-Exciton Model (CEM) of nuclear reactions is applied to analyze nucleon-induced fission cross sections for 209 Bi and 208 Pb nuclei in the 45–500 MeV energy range. The available data on linear momentum transfer are analyzed as well. The results are compared with analytical approximations resulting from a comparative(More)
Elastic neutron scattering from (12)C, (14)N, (16)O, (28)Si, (40)Ca, (56)Fe, (89)Y and (208)Pb has been studied at 96 MeV in the10-70 degrees interval, using the SCANDAL (SCAttered Nucleon Detection AssembLy) facility. The results for (12)C and (208)Pb have recently been published, while the data on the other nuclei are under analysis. The achieved energy(More)
This paper presents the ongoing analysis of two fission experiments. Both projects are part of the collaboration between the nuclear reactions group at Uppsala and the JRC-IRMM. The first experiment deals with the prompt fission neutron multiplicity in the thermal neutron induced fission of 235 U(n,f). The second, on the fission fragment properties in the(More)
In recent years, an increasing number of applications involving fast neutrons have been developed or are under consideration, e.g. radiation treatment of cancer, neutron dosimetry at commercial aircraft altitudes, soft-error effects in computer memories, accelerator-driven transmutation of nuclear waste and energy production and determination of the(More)
We report on the photonic band gap effect in the visible range in a three-dimensional dielectric lattice formed by closely packed silica spherical clusters and by interconnected cavities filled with various liquids. The spectral position and the spectral width of the optical " stop-band " depend on the lattice period and on the relative sphere/cavity(More)
In fast neutron cancer therapy, approximately 50% of the cell damage is caused by recoil protons from neutron-proton (np) scattering. In the intermediate energy region, there is a need for unambiguous np scattering data with good precision in both the shape of the angular distribution and the absolute normalisation. The normalisation techniques have been(More)
A new facility producing intense mono-energetic neutron beams has been developed at The Svedberg Laboratory (TSL), Uppsala, Sweden. The facility utilizes the existing cyclotron and a flexible lithium target in a rebuilt beam line. The new facility can operate at unsurpassed mono-energetic neutron intensities and provides flexibility of the neutron beam(More)
  • J D Joannopoulos, R D Meade, +41 authors Rabolt
  • 2001
average dielectric constant is áeñ = 1.94, and increases to áeñ = 2.22 in the infiltrated one (reducing the contrast at the same time). After inversion the mean dielectric constant decreases to áeñ = 1.41 and, accordingly, the L pseudogap energy shifts upwards (see Fig. 5). The peak width is a function of both the dielectric contrast and the filling factor(More)
Recently, many new applications of fast neutrons are emerging or under development, like dose effects due to cosmic ray neutrons for airplane crew, fast neutron cancer therapy, studies of electronics failure induced by cosmic ray neutrons and accelerator-driven incineration of nuclear waste and energy production technologies. In radiation treatment, the(More)