The LEALE quasi-monochromatic photon beam, produced by positron annihilation, was used to measure the238U photofission yields. Measurements were performed at 17 positron energies, from 120 MeV up to 280 MeV, and collecting the annihilation photons at an angle ≈1o. Fission fragments were detected with glass plates. The fission cross-section, deduced by means of an appropriate unfolding method, agrees very well with the results of a recent tagged-photon experiment. The calculated nuclear fissility results constant as a function of energy and equal to 0.87±0.13.
Photofission Cross-Section for U-238 BY (120-DIVIDED-BY-280) MeV Quasi-Monochromatic Photons
Bellini V.
Primo
;Emma V.Secondo
;Lo Nigro S.;
1985-01-01
Abstract
The LEALE quasi-monochromatic photon beam, produced by positron annihilation, was used to measure the238U photofission yields. Measurements were performed at 17 positron energies, from 120 MeV up to 280 MeV, and collecting the annihilation photons at an angle ≈1o. Fission fragments were detected with glass plates. The fission cross-section, deduced by means of an appropriate unfolding method, agrees very well with the results of a recent tagged-photon experiment. The calculated nuclear fissility results constant as a function of energy and equal to 0.87±0.13.File in questo prodotto:
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