Elastic and inelastic scattering of polarized protons from lead-206 and lead-208 near isobaric analog resonances

Technical Report · Thu Jul 01 00:00:00 EDT 1982

OSTI ID:6181713

Back, N L

Excitation functions have been measured for elastic scattering of polarized protons from /sup 206/Pb and /sup 208/Pb, and for inelastic scattering to collective states in /sup 206/Pb (2/sup +/, 0.8033 MeV; 3/sup -/, 2.647 MeV) and /sup 208/Pb (3/sup -/, 2.6145 MeV). Both differential cross sections and analyzing powers were measured at theta/sub lab/ = 120/sup 0/, 135/sup 0/, 150/sup 0/, and 165/sup 0/, for E/sub p/ = 14.25 to 18 MeV. Fits to the excitation-function data were obtained using scattering amplitudes consisting of sums of resonant and non-resonant parts. The resonances are the isobaric analogs (IARs) of 7 low-lying states in /sup 209/Pb and 35 in /sup 207/Pb. The fits to the elastic-scattering data are excellent; for the inelastic scattering the fit is very good for the 2/sup +/ state but only fair for the 3/sup -/ states. For each IAR, the energy, the total width, and the partial width and mixing phase in each channel were obtained. Also, new spin assignments were made for a number of parent states in /sup 207/Pb. The theory of Bund and Blair was used to find the spectroscopic amplitudes, which provide information on the wave functions for the parent states in /sup 207/Pb and /sup 209/Pb and for the 3/sup -/ states in /sup 206/Pb and /sup 208/Pb. These spectroscopic amplitudes were then checked for internal consistency and compared with the results of other experiments and with theoretical predictions.

• Research Organization: Washington Univ., Seattle (USA). Nuclear Physics Lab.
• DOE Contract Number: AC06-81ER40048
• OSTI ID: 6181713
• Report Number(s): DOE/ER/40048-45-L2; ON: DE83011459
• Country of Publication: United States
• Language: English

Related Subjects

651923 -- Nuclear Properties & Reactions
A=190-219
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANALYZING POWER
ANGULAR MOMENTUM
BARYON REACTIONS
BEAMS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
HADRON REACTIONS
HEAVY NUCLEI
INELASTIC SCATTERING
INFORMATION
ISOBARIC ANALOGS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD 206 TARGET
LEAD 207
LEAD 208 TARGET
LEAD ISOTOPES
LEVEL WIDTHS
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE PROPERTIES
POLARIZED BEAMS
PROTON REACTIONS
RADIOISOTOPES
RESONANCE
SCATTERING
SCATTERING AMPLITUDES
SECONDS LIVING RADIOISOTOPES
SPIN
STABLE ISOTOPES
TARGETS
WAVE FUNCTIONS