Directional characteristics of neutrons from the <i>p</i>(66)/Be(40) reaction

Symons, J.E.; Jones, D. T. L.; Brooks, F.D.; Nchodu, M. R.; Buffler, Andy; Allie, M. S.; Oliver, M. J.

doi:10.1118/1.597547

Cited by 1 publication

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“…Although the absolute fluence data given by Johnsen [54] may be problematic because of possible inaccuracies in the detector efficiency (see above) the relative values may be considered more reliable and are given here for comparison together with those of Waterman et al [60]. The average neutron energies as a function of angle [70] are given in Table 3. Symons et al [70] also measured neutron dose as a function of angle for the p(66) + Be(40) source.…”

Section: The P + 9 Be Reactionmentioning

confidence: 99%

“…the target was removed from the treatment head [70]. Two other sets of measurements at high energies (40) clinical source in a 10 × 10 cm 2 field at the isocentre for various irradiation conditions as indicated in the legend [39].…”

Section: The P + 9 Be Reactionmentioning

confidence: 99%

“…The average neutron energies as a function of angle [70] are given in Table 3. Symons et al [70] also measured neutron dose as a function of angle for the p(66) + Be(40) source. The dose half-angle (half Fig.…”

Section: The P + 9 Be Reactionmentioning

confidence: 99%

“…3. Measured fluence spectra of neutrons emitted at different laboratory angles from a p(66) + Be(40) source [70]. The spectra are normalized to a fluence of 1.0 in the lowest energy bin for the 0 • spectrum.…”

Section: The P + 9 Be Reactionmentioning

confidence: 99%

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Fast neutron and proton therapy sources

Jones¹

2001

Radiochimica Acta

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Neutrons from the reactions of protons or deuterons of energies between 35 and 70 MeV on beryllium are most suitable for therapy because of the high yield and good penetration. Lower energy sources are used for limited applications. Proton therapy is conducted mainly in two energy ranges, viz. 60-75 MeV (exclusively for the treatment of eye lesions) and ≥ 200 MeV for general applications. Characterisation of both neutron and proton therapy beams in terms of spectral fluence is important for accurate determination of dosimetry parameters, for interpreting biological effects, for intercomparison purposes and to perform accurate radiation transport calculations.

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