Radiochemical study of the combined ( p,. pi. /sup 0/) and (p,. gamma. ) reactions on bismuth with protons from 62 to 480 MeV

Journal Article · Sat Aug 01 04:00:00 EDT 1981 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.24.588· OSTI ID:6444166

Ward, T E; Singh, P P; Friesel, D L; Yavin, A; Doron, A; D'Auria, J M; Sheffer, G; Dillig, M

The excitation function for the combined /sup 209/Bi(p,..gamma..)/sup 210/Po and /sup 209/Bi(p,..pi../sup 0/)/sup 210/Po reactions was measured for proton energies from 62 to 480 MeV. The measurements were made using standard radiochemical and residual ..cap alpha..-counting techniques. Below pion-production threshold the radiative proton-capture cross section was observed to decrease with increasing proton energy. Above threshold the combined cross section increases to about 10 ..mu..b at 170 MeV. From a smooth extrapolation of the (p,..gamma..) cross section to energies above pion-production threshold, an estimate of a cross section for the (p,..pi../sup 0/) process is obtained. A theoretical fit of the summed total cross section into all particle bound states was made using a density of states factor, a two nucleon t matrix, and by taking into account the initial state (proton) and final state (pion) distortions using optical potentials.

• Research Organization: Indiana University Cyclotron Facility and Department of Physics, Indiana University, Bloomington, Indiana 47401
• OSTI ID: 6444166
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 24:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651925* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BISMUTH 209 TARGET
BOSONS
BOUND STATE
CAPTURE
CHARGED-PARTICLE REACTIONS
CHEMICAL ANALYSIS
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
FUNCTIONS
GAMMA RADIATION
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
IONIZING RADIATIONS
ISOTOPES
MESONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTICLE PRODUCTION
PIONS
PIONS NEUTRAL
POLONIUM 210
POLONIUM ISOTOPES
PROTON REACTIONS
PSEUDOSCALAR MESONS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATIONS
RADIOCHEMICAL ANALYSIS
RADIOISOTOPES
TARGETS