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PHOTONEUTRON CROSS SECTIONS FOR V$sup 51$ AND Co$sup 5$$sup 9$

Journal Article · · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
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The ( gamma ,n) and ( gamma ,2n) cross sections for Co/sup 60/ and V/sup 51/ have been measured, using nearly monochromatic photons obtained from the annihilation in flight of fast positrons. The integrated cross sections up to 28 Mev for sigma ( gamma ,n) and sigma ( gamma ,2n), respectively, are 0.447 plus or minus 0.044 and 0.139 plus or minus 0.014 Mev-b for Co, and 0.451 plus or minus 0.045 and 0.106 plus or minus 0.01l Mev-b for V. The minus-second cross sections ( sigma /sup -2/) are 1.82 and 1.56 mb/Mev, respectively, for these elements. the level density parameters a were determined to be 5.49 and 6.18 Mev- 1, respectively. The quadrupole moments determined from the compound-nucleus formation cross sections, sigma ( gamma ,n) + sigma ( gamma ,2n) + sigma ( gamma ,np), were found to be 0.94 plus or minus 0.13 and 0.66 plus or minus 0.09 b, respectively, for Co and V. (auth)
Research Organization:
Univ. of California, Livermore
NSA Number:
NSA-17-004097
OSTI ID:
4760443
Report Number(s):
UCRL-6913; 0031-899X
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Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 128; ISSN PHRVA
Country of Publication:
United States
Language:
English

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Related Subjects

ANNIHILATION
COBALT 59
CROSS SECTIONS
DENSITY
ELECTRIC MOMENTS
ENERGY LEVELS
GAMMA RADIATION
LIFETIME
NEUTRONS
NUCLEI
PHOTONEUTRONS
PHOTONS
PHYSICS
POSITRONS
VANADIUM 51