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Ferguson, Howard

doi:10.1093/ml/58.3.331

Cited by 2 publications

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“…Following the recent contributions on the derivations of the conversion factors C, and C, (Nahum and Greening 1976, 1977, Williams 1977, Fregene 1977, Holt and Kessaris 1977, Almond and Svensson 1977 we should like to bring to your attention some recent experimental results obtained a t this centre using an MEL (SL75/20) linear accelerator.…”

Section: The Editor Sirmentioning

confidence: 97%

Neutrons from deuteron bombardment of Be and D

Cranberg¹

1978

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1978 CORRESPONDENCE Neutrons from Deuteron Bombardment of Be and D THE EDITOR, Sir,At the present time, a discrepancy exists with respect to the data on the lowenergy portion of the neutron spectrum from the reaction which is most intensively used for neutron therapy-namely, bombardment of beryllium with deuterons. On the one hand, the data of Parnell (1972), for a deuteron energy of 16.7 MeV, show a single, broad, high-energy maximum in the neutron yield, with a monotonic decrease down to 1 MeV, while the recent data of Lone, Bigham, Fraser, Schneider, Alexander, Ferguson and McDonald (1977) show in addition a very steep rise in the yield below 2 MeV. Both results are for the yield at zero degrees. The only other spectral data which extend to a sufficiently low energy to observe the low-energy maximum are due to Meulders, Leleux, Macq and Pirart (1975). Their data, which extend down to about 2.5 MeV, show what can be interpreted as the beginning of a rise at lower energy.Recently, August, Attix, Herling, Shapiro and Theus (1976) have proposed a description of the reaction in terms of (d,n) stripping only, with an estimate that the low-energy yield due to other reactions will be isotropic, and amount to less than 2% of the forward yield. This matter will have to be resolved by experiment, but it is pertinent to call attention to another reaction which is also being used for neutron therapy-namely, the neutrons from deuteron bombardment of deuterium-and to offer a few comparative comments with respect to low-energy neutrons. Edwards, Fielding, Kraushaar and Weaver

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Section: The Editor Sirmentioning

confidence: 97%

Neutrons from deuteron bombardment of Be and D

Cranberg¹

1978

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“…The paper by Alsmiller and Barish (1974) gives calculations for absorbed dose versus depth, lineal energy transfer (LET) spectra, cell-survival probabilities, oxygen enhancement ratios, and RBEs as a function of position in a phantom for three neutron sources, D(35) + Be, D(50) + Be and P(67) + Li, whose spectra were published by others. It is unfortunate that recent data of Lone, Bigham, Fraser, Schneider, Alexander, Ferguson and McDonald (1977) strongly suggest that the important low-energy portions of the spectra assumed in the calculations of Alsmiller and Barish were seriously in error.…”

Section: Neutron Spectrometry and Neutron Therapymentioning

confidence: 99%

Neutron spectrometry and neutron therapy

Cranberg¹

1979

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Reviews of Books

Cited by 2 publications

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Neutrons from deuteron bombardment of Be and D

Neutrons from deuteron bombardment of Be and D

Neutron spectrometry and neutron therapy

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