The neutron total cross section of B has been determined between 90 and 420 keV neutron energy by means of a transmission measurement on a boron sample enriched in B. Deviations in shape from other measurements are within the statistical accuracy of the present measurement and are smaller than ...
The total neutron cross sections of 10B, 11B, C and O and the absorption cross section of 10B have been measured for neutron energies between 10 and 500 keV. The 10B absorption cross section does bot deviate appreciably from a 1/ν dependence in this interval of neutron energies. The ...
Because of its high neutron cross-section, boron-10 is often used to control fission in nuclear reactors as a neutron-capturing substance.[47] Several industrial-scale enrichment processes have been developed, however only the fractionated vacuum distillation of the dimethyl ether adduct of boron ...
The capture cross section of natural boron for slow neutrons has been measured by a dynamic method, in which the decay constant of neutrons in a water tank was plotted against the concentration of added borax. Samples were compared with a standard boron oxide in GLEEP at the Atomic Energy Res...
Due to its properties, B4C is mainly applied as a ceramic material for the production of abrasion-resistant molds, low-wear bearings, nozzles and ballistic armor, as well as in the nuclear industry as a neutron absorber due to its high cross-section and self-repair ability [11]. B4C ...
Since neutron cross sections vary sig- nificantly between elements, NCT dose calculations must model the elemental compositions of different tissue types in the region of interest. Concentrations of hydrogen, ni- trogen, and boron have the most influence on neutron transport and dosimetry. BNCT ...
The neutron capture cross-sections (σ) vary significantly between nuclides. Because the thermal neutrons are preferentially captured by10B nuclei (3837 barn, capture cross-section many times greater than that of C (0.0037 barn), H (0.332 barn), O (0.0002 barn), and N (1.75 barn) of which...
The transmission measurements on Li at neutron energies of 0.51 meV, 1.26 eV and 5.19 eV delivered data for the6Li-abundances in the samples and for the free scattering cross section of7Li. By means of experiments on 15 different samples of lithium compounds we obtained the complex spin state...
BNCT is particularly promising for treating locally invasive malignant tumors due to the high neutron-capture cross-section of 10B and the short ranges of its resulting alpha particles and recoiling 7Li nuclei [1]. These high linear energy transfer (LET) particles, with LET values of approximatel...
In addition, fast neutron therapy facilities have been studying methods to moderate their beams to take advantage of the high cross section for epithermal neutrons on boron-10. This paper describes the technical issues involved in each approach and presents the motivation for undertaking such studies...