Abstract
The Relative Biological Efficiency (RBE) of 6-GeV-bremsstrahlung on 3-days-old seedlings of Vicia faba was investigated with the Deutsches ElektronenSynchrotron. Dosimetry was carried out by means of the butanol-sensitized Fe II /Fe III -reaction. In a Lucite-phantom we observed an increase of the RBE from 0,65 at the surface to values of about 2 at a depth of 40 cm. As changes of that order of magnitude are doubtless beyond the limits of the maximum experimental error we suppose that production of heavy particles by nuclear reactions such as (γ, n) or (γ, p) in deeper layers of matter might cause an increase of the linear energy transfer of the beam.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 1
Claim · model-written summary
Radiation relative biological efficiency rose from 0,65 at the surface to about 2 at 40 cm depth.
- Taxon
- Vicia faba
Vicia fabat0 - Outcome
- RBEe0
- Direction
- increasee0
- Value
- about 2e0
- Qualifier
- 0,65 at the surfacee0
- Setting
- Lucite-phantome1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vicia faba”
e0“we observed an increase of the RBE from 0,65 at the surface to values of about 2 at a depth of 40 cm”
e1“In a Lucite-phantom”