EXCITATION FUNCTIONS OF (p,2 NUCLEON) REACTIONS

Journal Article · Wed Mar 15 04:00:00 EST 1961 · Physical Review (U.S.) Superseded in part by Phys.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.121.1815· OSTI ID:4056481

Strohal, P P; Caretto, Jr, A A

Excitation functions for the (p,pn) reaction were determined in the energy range 250 to 440 Mev for the target nuclei As/sup 75/, Br/sup 81/, Zr/sup 96/, I/sup 127/, Ce/sup 14/< s2>s, W/sup 186/, and Re/sup 187/. Both isomer products were determined in the case of the Br/sup 81/(p,pn)Br/sup 80/ reaction. Also, excitation functions were determined for the (p,2p) reaction on Zr/sup 96/, Ce/sup 142/, and W/sup 1/ s/sup 86/ and for the (p,2n) reaction on Zr/sup 96/. All cross sections were measured relative to the Al/sup 27/(p,3pn)Na/sup 24/ excitation function. The (p,pn) excitation functions are only moderately sensitive to energy showing an increase by about 30% for iodine, 20% for arsenic and cerium, and a 12% decrease for zirconium. The remaining excitation functions are flat. The ratio of sigma /sub p,p//sub n/ to sigma /sub p,2//sub p/ is 1.62 plus or minus 0.09, for the thr ee targets measured, at 440 Mev. The various mechanisms for the production of reactions of this type are examined in the light of present understanding. The suggestion is made that, despite the relative insensitivensss of these excitation functions to energy, (p,pn) and (p,2p) reactions may take place by more than one mechanism in this energy region. A comparison is made with the results of recent Monte Carlo nuclear cascade calculations applied to calculation of (p,pn) reaction excitation functions. (auth)

• Research Organization: Carnegie Inst. of Tech., Pittsburgh
• NSA Number: NSA-15-015088
• OSTI ID: 4056481
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 121; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM 27
ARSENIC 75
BROMINE 80
BROMINE 81
CERIUM 142
CROSS SECTIONS
ENERGY
ENERGY RANGE
EXCITATION
INTERACTIONS
IODINE 127
ISOMERS
MATHEMATICS
MEASURED VALUES
MONTE CARLO METHOD
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEONS
PHYSICS
PROTON BEAMS
PROTONS
RHENIUM 187
SODIUM 24
STANDARDS
TARGETS
TUNGSTEN 186
ZIRCONIUM 96