PRECISION MEASUREMENT OF THE Be$sup 9$$($$gamma$,n) CROSS SECTION

Journal Article · Mon Jun 01 04:00:00 EDT 1959 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.114.1319· OSTI ID:4224387

Gibbons, J H; Macklin, R L; Marion, J B; Schmitt, H W

Measurements have been made of the photoneutron cross section for Be/sup 9/ using gamma rays from radioactive sources of Y/sup 88/ (l.85 Mev) and Sb/sup 124/ (1.69 Mev). The values obtained at these two energies are (6.54 plus or minus 0.31) x 10/sup -28/ cm/sup 2/ and (12.62 plus or minus 0.69) x 10/sup - 28/ cm/.sup 2/, respectiv ely. The limiting factors in the accuracy of these measurements are the uncertainties in the gamma -ray source strength calibration and in the NBS No. 2 Ra- gamma -Be neutron source standard, and the lack of precise knowledge concerning the Sb/sup 124/ decay scheme. A new measurement of the gamma -ray branching ratios in the Sb/sup 124/ decay has also been made. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• NSA Number: NSA-13-020541
• OSTI ID: 4224387
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 114; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANTIMONY 124-- DECAY-- GAMMA SOURCES-- RADIOISOTOPES-- RADIUM-- STANDARDS-- YTTRIUM 88
BERYLLIUM 9-- CROSS SECTIONS-- ENERGY RANGE-- ERRORS-- GAMMA RADIATION-- MEASURED VALUES-- MEV RANGE-- NUCLEAR REACTIONS-- PHOTONEUTRONS
PHYSICS AND MATHEMATICS