Pion inelastic scattering to giant resonances and low-lying collective states in /sup 118/Sn and /sup 40/Ca

Journal Article · Tue Jan 01 04:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.177· OSTI ID:6146447

Ullmann, J L; Kraushaar, J J; Masterson, T G; Peterson, R J; Raymond, R S; Ristinen, R A; King, N S.P.; Boudrie, R L; Morris, C L; Anderson, R E; Siciliano, E R

A comparison of differential cross sections for inelastic scattering of 130 MeV positive and negative pions has been made for studying the giant resonance region in /sup 118/Sn and /sup 40/Ca. In addition, several of the low-lying collective states in each target were examined. Comparison to distorted wave impulse approximation calculations allowed collective deformation lengths ..beta..R and fractions of the energy-weighted sum rules to be extracted. For bound collective states, the strengths for ..pi../sup +/ and ..pi../sup -/ were nearly equal, as has been found for other scattering probes. Giant quadrupole and dipole excitations in /sup 40/Ca (T = 0) had nearly equal ..pi../sup +/ and ..pi../sup -/ sum rule strengths. Quadrupole and monopole excitations in /sup 118/Sn near 14 MeV show about twice the ..pi../sup -/ transition strengths compared to those for ..pi../sup +/, contrary to expectations from simple isoscalar models.

• Research Organization: University of Colorado, Boulder, Colorado 80309
• OSTI ID: 6146447
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
CALCIUM 40
CALCIUM 40 TARGET
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
COLLECTIVE MODEL
CROSS SECTIONS
DEFORMATION
DIFFERENTIAL CROSS SECTIONS
ENERGY LEVELS
ENERGY RANGE
EQUATIONS
EVEN-EVEN NUCLEI
GIANT RESONANCE
HADRON REACTIONS
INELASTIC SCATTERING
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
RESONANCE
SCATTERING
STABLE ISOTOPES
SUM RULES
TARGETS
TIN 118
TIN 118 TARGET
TIN ISOTOPES