RBE of d(59)-Be neutrons and of 650-MeV helium ions at different depths for growth reduction in Vivia faba

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Radiat. Res.; (United States)

OSTI ID:5393796

Van Dam, J ^[1]; Billiet, G; Wambersie, A; Bridier, A; Dutreix, A; Bouhnik, C

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1. Academisch Ziekenhuis St. Rafael, Louvain, Belgium

RBE and OER measurements for d(50)-Be neutrons produced at the cyclotron CYCLONE (Louvain-la-Neuve) and RBE measurements for 650-MeV helium ions produced at the synchrotron SATURNE (Saclay) were perfomed using growth reduction in Vicia faba root meristems. For d(50)-Be neutrons, RBE increases from 2.8 to 3.6 and 4.1 for neutron absorbed doses decreasing from 0.9 to 0.4 and 0.25 Gy, respectively, /sup 60/Co-..gamma.. rays being used as reference. The OER for d(500-Be neutrons was found equal to 1.5 and the OER for /sup 60/Co was 2.6; their ratio (or gain factor) is then equal to 1.8 RBE of the 650-MeV He/sup 2 +/ beam, produced at SATURNE, was investigated as a function of depth in the irradiated medium, taking as reference the initial plateau region. For the dose range which could be investigated with Vicia faba, RBE increases from 1.4 to 1.5 and 2.0 at the beginning, middle, and end of the spreadout Bragg peak, i.e., at depths of 13, 15, and 17 cm, respectively. RBE of the He/sup 2 +/ beam in the initial plateau region was found equal to 1.1 with respect to /sup 60/Co-..gamma.. rays.

• OSTI ID: 5393796
• Journal Information: Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 81:1; ISSN RAREA
• Country of Publication: United States
• Language: English

Related Subjects

560141* -- Radiation Effects on Plants-- Basic Studies-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
COBALT 60
COBALT ISOTOPES
DATA
DATA FORMS
DEPTH DOSE DISTRIBUTIONS
DOSE-RESPONSE RELATIONSHIPS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
GAMMA RADIATION
GROWTH
HADRONS
HELIUM IONS
INFORMATION
INHIBITION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOLATED VALUES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEGUMINOSAE
MERISTEMS
MINUTES LIVING RADIOISOTOPES
NEUTRONS
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
OXYGEN ENHANCEMENT RATIO
PLANT TISSUES
PLANTS
RADIATION DOSE DISTRIBUTIONS
RADIATION EFFECTS
RADIATIONS
RADIOISOTOPES
RADIOSENSITIVITY
RBE
ROOTS
SPATIAL DOSE DISTRIBUTIONS
VICIA
YEARS LIVING RADIOISOTOPES