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 00:00:00 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), Vol. 81:1
• Country of Publication: United States
• Language: English

Related Subjects

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