PHOTONEUTRON CROSS SECTIONS OF COBALT AND MANGANESE

Journal Article · Tue Nov 15 04:00:00 EST 1960 · Physical Review (U.S.) Superseded in part by Phys.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.120.1424· OSTI ID:4118922

Flournoy, P A; Tickle, R S; Whitehead, W D

The total photoneutron yields of Mn/sup 55/ and Co/sup 59/ were measured from threshold to approximately 30 Mev. Analysis of these data using the Leiss- Penfold matrix indicated that the cross sections for both elements show a splitting in the giant resonance region in accord with the predictions of the classical hydrodynamic model. The Mn/sup 55/ peaks occurred at energies of 16.8 plus or minus 0.25 and 19.75 plus or minus 0.25 Mev, corresponding to cross sections of 90 and 77 mb, respectively. Co/sup 59/ maxima occurred at 16.75 plus or minus 0.25 and 18.75 plus or minus 0.25 Mev with cross sections of 109 and 92 mb. The cross sections sigma ( gamma ,n) + sigma ( gamma ,2n) + sigma ( p) +... integrated to 25 Mev were 627 Mev-mb for Mn/sup 55/ and 709 Mev-mb for Co/sup 59/. Breit-Wigner resonance lines were fitted to both cross sections and the intrinsic quadrupole moments determined from these fits were + 0.78 plus or minus 0.10 barn for manganese and +0.76 plus or minus 0.11 bam for cobalt. (auth)

• Research Organization: Univ. of Virginia, Charlottesville
• NSA Number: NSA-15-003486
• OSTI ID: 4118922
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 120; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BREIT-WIGNER FORMULA
COBALT
CROSS SECTIONS
ENERGY LEVELS
MANGANESE
MEASURED VALUES
NEUTRONS
PHOTONEUTRONS
PHOTONS
PHYSICS
RESONANCE
SCATTERING