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 00:00:00 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), Vol. 24:2
• Country of Publication: United States
• Language: English

Related Subjects

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