High-Energy Neutrons Produced by 740-MeV Protons on Uranium

Madey, Richard; Waterman, Frank M.

doi:10.1103/PhysRevC.8.2412

High-Energy Neutrons Produced by 740-MeV Protons on Uranium

Journal Article · Sat Dec 01 04:00:00 EST 1973 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.8.2412· OSTI ID:4337119

Madey, Richard; Waterman, Frank M.

Neutron spectra from 740-MeV proton bombardment of a 30-cm thick depleted /sup 238/U target were measured from 20 to 500 MeV at 50 deg and from 5 to 140 MeV at 130 deg with respect to the proton beam. Measurements were made at the Lawrence Berkeley Laboratory (LBL) 184-in. cyclotron with a self-contained neutron time-of-flight spectrometer. The results are compared with a Monte Carlo calculation of the neutron cascade-evaporation spectrum. While the shapes of the measured and calculated spectra are in general agreement, this comparison shows that the intranuclear cascade model underestimates the production of cascade neutrons at wide angles; furthermore, this comparison shows that this discrepancy increases with increasing angle of emission. At 50 deg, the yield of ncutrons above 25 MeV is 1.4 times that calculated; at 130 deg , this factor increases to 1.6. For neutrons above 25 MeV, the measured yield at 50 deg is 5 times greater than that at 130 deg. From the measurements at 50 to 130 deg, it is estimated that the total integrated yield above 25 MeV is 0.9/sub 5/ neutrons per incident proton; the Monte Carlo calculation predicts 0.67 neutrons per incident proton. Below 20 MeV, the results are in agreeement with the calculation. (auth)

Research Organization:: Kent State Univ., Kent, OH (United States)

Sponsoring Organization:: USDOE

NSA Number:: NSA-29-023289

OSTI ID:: 4337119

Journal Information:: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 8; ISSN 0556-2813; ISSN PRVCAN

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

References (13)

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Secondary Particle Spectra from the Interaction of 30- to 340-MeV Protons on Complex Nuclei: Experimental Data and Comparison with Theory Bertini, Hugo W. Physical Review, Vol. 162, Issue 4 https://doi.org/10.1103/PhysRev.162.976	journal	October 1967
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Intranuclear-Cascade Calculation of the Secondary Nucleon Spectra from Nucleon-Nucleus Interactions in the Energy Range 340 to 2900 MeV and Comparisons with Experiment Bertini, Hugo W. Physical Review, Vol. 188, Issue 4 https://doi.org/10.1103/PhysRev.188.1711	journal	December 1969
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High-Energy Neutrons Produced by 740-MeV Protons on Uranium

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