Core-excitation effects in pion double charge exchange

Journal Article · Mon Mar 12 04:00:00 EST 1984 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.52.894· OSTI ID:7185166

Seth, K K; Kaletka, M; Iversen, S; Saha, A; Barlow, D; Smith, D; Liu, L C

Differential cross sections for the pion double-charge-exchange reaction /sup 42/Ca(..pi../sup +/, ..pi../sup -/)/sup 42/Ti(g.s.) have been mesured at theta/sub lab/ = 5/sup 0/ at several energies. For T(..pi../sup +/)<200 MeV, sigma(5/sup 0/) are found to be more than an order of magnitude larger than those predicted by conventional double-charge-exchange calculations. It is shown that the observed enhancements can be explained in terms of coherent contributions due to terms proportional to rho/sup 2/(r) in the pion-nucleus potential whose importance is dramatically enhanced in presence of large core-excitation components in /sup 42/Ca(g.s.).

• Research Organization: Northwestern University, Evanston, Illinois 60201
• OSTI ID: 7185166
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 52:11; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

651525* -- Nuclear Properties &amp; Reactions
A=39-58
Experimental-- Nuclear Reactions &amp; Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCIUM 42 TARGET
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ENERGY RANGE
ENERGY SPECTRA
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
HADRON REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
LAMPF LINAC
LINEAR ACCELERATORS
MESON FACTORIES
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
OPTICAL MODELS
PION REACTIONS
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
SPECTRA
TARGETS
TITANIUM 42
TITANIUM ISOTOPES