Spin flip effects in pion nucleus interactions

Thesis/Dissertation · Mon Mar 01 00:00:00 EST 1993

OSTI ID:10141614

Kagarlis, M A

We investigate the effect of spin flip in the reaction mechanism of pion nucleus interactions, theoretically and experimentally. We construct the microscopic optical potential in configuration space from first principles, summing particle-hole pair contributions. Subsequently, we solve the coupled-channel Klein-Gordon equation including spin flip and Fermi averaging corrections. We calculate the transition matrix elements for elastic, inelastic and charge exchange scattering. We compare and contrast to previous models with the aid of a code, based on the formalism as described. In addition, we analyze the experimental spectra obtained for the double charge exchange reaction {sup 93}Nb({pi}{sup +}, {pi}{sup {minus}}){sup 93}Tc at a scattering angle of 5{degree} and three beam energies, T{pi} = 164, 230, 294 MeV, with emphasis on a particular class of states (T<) below the double isoboric analog state. The excitation function of the T< states cannot be understood without the participation of spin flip in the reaction mechanism. From our theoretical and experimental analysis we conclude that spin flip is an important component of the reaction mechanism in the scattering of pions from nuclei.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10141614
• Report Number(s): LA-12443-T; ON: DE93010695
• Resource Relation: Other Information: DN: Thesis submitted to Univ. of Pennsylvania, Philadelphia, PA.; TH: Thesis (Ph.D.); PBD: Mar 1993
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PION-NUCLEON INTERACTIONS
SPIN FLIP
PION PLUS REACTIONS
CHARGE-EXCHANGE REACTIONS
NIOBIUM 93 TARGET
KLEIN-GORDON EQUATION
ISOSPIN
EXPERIMENTAL DATA
THEORETICAL DATA
MATRIX ELEMENTS
SCATTERING
NUCLEAR STRUCTURE
663460
663560
662340
MESON- AND HYPERON-INDUCED REACTIONS AND SCATTERING
A = 90-149
HADRON INTERACTIONS