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Positive-pion double-charge-exchange reaction: experiments on the isotopic pairs oxygen-16,18 and magnesium-24,26

Technical Report ·
DOI:https://doi.org/10.2172/6336080· OSTI ID:6336080
The (..pi../sup +/,..pi../sup -/) double-charge-exchange (DCX) reaction has been performed on targets of T = 0,1 isospin (and isotopic) pairs /sup 16/ /sup 18/O and /sup 24/ /sup 26/Mg. Energy excitation functions of d sigma/d ..cap omega.., across the (3,3) ..pi..-N resonance, are presented for transitions to double-isobaric analog state (DIAS) and non-DIAS ground-state residual nuclei. Angular distributions in the region of 5/sup 0/ to 33/sup 0/ are presented for the DIAS from the T = 1 nuclei. The similarities and differences of DIAS and non-DIAS distributions are discussed in relation to reaction-mechanism and nuclear-structure effects. Also, a simple, two-amplitude model for the /sup 18/O excitation function, consistent with the data, is presented. The utility of DCX in nuclear mass measurements is discussed, with some examples.
Research Organization:
Los Alamos National Lab., NM (USA); Texas Univ., Austin (USA). Dept. of Physics
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
6336080
Report Number(s):
LA-8891-T; ON: DE81028515
Country of Publication:
United States
Language:
English

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Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATOR FACILITIES
ACCELERATORS
ANGULAR DISTRIBUTION
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ENERGY LEVELS
ENERGY RANGE
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
GROUND STATES
HADRON REACTIONS
INFORMATION
ISOBARIC ANALOGS
ISOSPIN
LAMPF LINAC
LINEAR ACCELERATORS
MAGNESIUM 24 TARGET
MAGNESIUM 26 TARGET
MESON FACTORIES
MESON REACTIONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUMERICAL DATA
OXYGEN 16 TARGET
OXYGEN 18 TARGET
PARTICLE PROPERTIES
PION PLUS REACTIONS
PION REACTIONS
POTENTIALS
TARGETS
TOTAL CROSS SECTIONS