Time of flight measurements of the energy spectrum of neutrons emitted from a spallation source and moderated in water

Condé, H.; Grusell, Erik; Larsson, B.; Pettersson, Carina; L, Thuresson; Crawford, J. F.; Reist, H.W.; Dahl, B.; Sjöstrand, N.G.

doi:10.1016/0168-9002(87)90372-x

Cited by 5 publications

(1 citation statement)

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“…14,15) The spallation reaction provides a much larger neutron yield 16) than the reactions 7 Li(p; n) and 9 Be(p; n) and allow the proton current to be greatly reduced. The use of the spallation reaction as a neutron source for BNCT was studied at Uppsala University 17,18) and the study was followed by Paul Scherrer Institut (PSI). 19,20) They showed that a 100 mA proton current at 72 MeV is needed for BNCT, but no further studies were subsequently reported by them on this idea.…”

Section: Introductionmentioning

confidence: 99%

Engineering Design of a Spallation Reaction-Based Neutron Generator for Boron Neutron Capture Therapy

Tahara

Oda

Shiraki

et al. 2006

Journal of Nuclear Science and Technology

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An engineering design of an epithermal neutron generator for boron neutron capture therapy (BNCT) has been completed, which utilizes the spallation reaction by protons accelerated to 50 MeV. The critical issues for realization of the neutron generator are the mechanical structure of a target with cooling capability and its integrity under operating conditions with powers as high as 50 MeVÂ300 mA.The integrity of a target structure design has been confirmed by thermal and stress analyses with a finite element method code ANSYS. Moreover, a target replacement strategy is also studied based on a radioactivity evaluation performed by the IRACM code system.In addition to the target structure design, the neutronics design has been optimized with the Monte Carlo code MCNPX. A high epithermal neutron flux of 1:8Â10 9 cm À2 Ás À1 has been achieved at the aperture of the collimator, which allows a RBE dose of over 30 Gy-eq to be delivered to a brain tumor within 5.9 cm in phantom depth for a therapeutic time of 31 min.

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