C$sup 12$(p,pn)C$sup 11$ CROSS SECTION AT 2 AND 3 Bev

Journal Article · Mon Sep 01 04:00:00 EDT 1958 · Physical Review (U.S.) Superseded in part by Phys.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.111.1386· OSTI ID:4287708

Cumming, J B; Friedlander, G; Swartz, C E

Absolute measurements of the C/sup 12/(p,pn)C/sup 11/ cross sections were carried out in the external pencil beam of the Cosmotron at 2 and 3 Bev. The proton flux was measured with a counter telescope, and the C/sup 11/ activity induced in 1-inch-thick plastic sctntillators was determined by internal scintillation counting. Correcttons for the formation of C/sup 11/ by secondary particles produced in the thick targets were determined tn separate experiments to which than- and thick-target cross sections were compared dtrectly. Other corrections for scattering and absorptton effects and for deadtime losses in counters are discussed. Measurements were carried out both at proton fluxes sufficiently- low to permit direct counting with the primary telescope and at higher fluxes which required scaling procedures with secondary telescopes. The measured cross sections for the t 2.0 and 3.0 Bev-, respectively. From these data and from previously published cross-section ratios, the cross section of the A/sup 27/(p,3pn)Na/sup 24/ reaction is found to be 10.4 =0.6 and 10.0=0.6 mb at2.0 and3.0 Bev-, respectively. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• NSA Number: NSA-13-000900
• OSTI ID: 4287708
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 111; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ACTIVATION
ALUMINUM 27
CARBON 11
CARBON 12
COUNTERS
CROSS SECTIONS
ENERGY
ENERGY RANGE
MEASURED VALUES
NEUTRONS
NUCLEAR REACTIONS
PHYSICS AND MATHEMATICS
POLYMERS
PROTON BEAMS
PROTONS
RESOLUTION
SCATTERING
SCINTILLATION COUNTERS
SODIUM 22
SYNCHROTRONS
TARGETS