Spin excitations in pion inelastic scattering

Conference · Fri Jan 01 04:00:00 EST 1982

DOI:https://doi.org/10.1007/978-1-4684-4706-4_19· OSTI ID:5190909

Seestrom-Morris, S J; Holtkamp, D B; Cottingame, W B

The data on spin excitations observed in pion inelastic scattering are reviewed. A predominant feature of this process is the selectivity with which high-spin unnatural-parity states are excited. Constant-q excitation functions have proven valuable in identifying unnatural-parity states because of the unique signature of ..delta..S = 1 transitions. It has recently been shown that angular distributions measured for transitions to natural-parity states are quite different for ..delta..S = 0 and ..delta..S = 1 transitions. Pion scattering should continue to prove useful in studying the spin structure of nuclear transitions because of the sensitivity of both excitation functions and angular distributions to the spin transferred to the nucleus. In particular, pion scattering measurements may be helpful in searches for spin-mode giant resonances. In addition to the ability to distinguish transitions dominated by ..delta..S = 1, comparisons of ..pi../sup +/ and ..pi../sup -/ scattering can be used to determine the relative contributions of neutrons and protons to inelastic transitions. In each N not equal to Z nucleus studied there have been large ..pi../sup +//..pi../sup -/, asymmetries observed for some transitions to stretched states. This results in information that is not obtainable from 180/sup 0/ electron scattering.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5190909
• Report Number(s): LA-UR-82-854; CONF-820357-1; ON: DE82012168
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BORON 13
BORON 13 TARGET
BORON ISOTOPES
CARBON 12
CARBON 12 TARGET
CARBON 13
CARBON 13 TARGET
CARBON 14
CARBON 14 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ENERGY LEVELS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITATION FUNCTIONS
FUNCTIONS
HADRON REACTIONS
INELASTIC SCATTERING
ISOTOPES
LIGHT NUCLEI
MESON REACTIONS
NITROGEN 14
NITROGEN 14 TARGET
NITROGEN 15
NITROGEN 15 TARGET
NITROGEN ISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
OXYGEN 16
OXYGEN 16 TARGET
OXYGEN ISOTOPES
PARTICLE PROPERTIES
PION REACTIONS
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
SILICON 28
SILICON 28 TARGET
SILICON ISOTOPES
SPIN
STABLE ISOTOPES
TARGETS
YEARS LIVING RADIOISOTOPES