منابع مشابه
Proton Linacs for Boron Neutron Capture Therapy
Recent advances in the ability to deliver boron-containing drugs to brain tumors have generated interest in -4 MeV liiacs as sources of epithemtal neutrons for radiation therapy. In addition, fast neutron therapy facilities have been studying methods to moderate their beams to take advantage of the high cross section for epithennal neutrons on boron-10. This paper describes the technical issues...
متن کاملRadiative neutron capture on a proton at BBN energies
The total cross section for radiative neutron capture on a proton, np → dγ, is evaluated at big bang nucleosynthesis (BBN) energies. The electromagnetic transition amplitudes are calculated up to next-to leading order within the framework of pionless effective field theory with dibaryon fields. We also calculate the dγ → np cross section and the photon analyzing power for the d~γ → np process f...
متن کاملRadiative neutron-proton capture in effective chiral Lagrangians.
We calculate the cross-section for the thermal n+ p → d+ γ process in chiral perturbation theory to next-to-next-to-leading order using heavy-fermion formalism. The exchange current correction is found to be (4.5 ± 0.3) % in amplitude and the chiral perturbation at one-loop order gives the cross section σ th = (334 ± 2) mb which is in agreement with the experimental value (334.2 ± 0.5) mb. Toge...
متن کاملParity nonconserving observables in thermal neutron capture on a proton
Abstract We calculate parity nonconserving observables in the processes where a neutron is captured on a proton at the threshold energy radiating a photon. Various potential models such as Paris, Bonn and Argonne v18 are used for the strong interactions, and the meson-exchange description is employed for the weak interactions between hadrons. The photon polarization Pγ in the unpolarized neutro...
متن کاملDesign and Simulation of Photoneutron Source by MCNPX Monte Carlo Code for Boron Neutron Capture Therapy
Introduction Electron linear accelerator (LINAC) can be used for neutron production in Boron Neutron Capture Therapy (BNCT). BNCT is an external radiotherapeutic method for the treatment of some cancers. In this study, Varian 2300 C/D LINAC was simulated as an electron accelerator-based photoneutron source to provide a suitable neutron flux for BNCT. Materials and Methods Photoneutron sources w...
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ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 1980
ISSN: 0004-9506
DOI: 10.1071/ph800159a