Observation of analogs of the giant-dipole resonance in pion single charge exchange on /sup 40/Ca

Journal Article · Mon Nov 08 04:00:00 EST 1982 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.49.1376· OSTI ID:6632652

Baer, H W; Bolton, R; Bowman, J D

The pion single-charge-exchange reactions /sup 40/Ca(..pi../sup + -/,..pi../sup 0/) were measured at 164 MeV in the angular range 0/sup 0/ to 30/sup 0/. The spectra show pronounced peaks at energies corresponding to the analog states of the isovector electric dipole resonance in /sup 40/Ca. The maximum (..pi../sup -/,..pi../sup 0/) cross section is 1.69 +- 0.24 times the (..pi../sup +/,..pi../sup 0/) cross section. The measured angular distribution shapes and magnitudes are quite well described by distorted-wave impulse-approximation calculations based on the Goldhaber-Teller transition density.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6632652
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 49:19; ISSN PRLTA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
BOSONS
CALCIUM 40
CALCIUM 40 TARGET
CALCIUM ISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIPOLES
DISTORTED WAVE THEORY
DISTRIBUTION
ELECTRIC DIPOLES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GIANT RESONANCE
HADRON REACTIONS
HADRONS
IMPULSE APPROXIMATION
INFORMATION
ISOBARIC ANALOGS
ISOTOPES
LIGHT NUCLEI
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
MULTIPOLES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RESONANCE
STABLE ISOTOPES
TARGETS