Isovector parity mixing in sup 16 O investigated via the sup 15 N( rvec p ,. alpha. sub 0 ) sup 12 C resonance reaction

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.44.491· OSTI ID:5607751

Kniest, N; Horoi, M; Dumitrescu, O; Clausnitzer, G ^[1]

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1. Institut fuer Kernphysik, Strahlenzentrum der Universitaet Giessen, D-6300 Giessen, Germany (DE)

The parity- and isospin-forbidden {alpha}{sub 0} decay from {sup 16}O{sup *}({ital J}{sup {pi}}=2{sup {minus}}, {ital T}=1, {ital E}{sub {ital x}}=12.9686 MeV) to {sup 12}C(g.s.) has been investigated theoretically. Considering various strong and weak interaction models the longitudinal {ital A}{sub {ital L}} and the irregular transverse {ital A}{sub {ital b}} analyzing powers of the reaction {sup 15}N({ital {rvec p}},{alpha}{sub 0}){sup 12}C have been calculated in the energy range of the 2{sup {minus}} resonance in {sup 16}O{sup *}. Energy anomalies for the expected interference effects, relevant for experiments, have been found to be {ital A}{sub {ital L}}=1.1{times}10{sup {minus}5} and {ital A}{sub {ital b}}=0.9{times}10{sup {minus}5} at {theta}=90{degree} and {ital A}{sub {ital L}}=1.4{times}10{sup {minus}5} and {ital A}{sub {ital b}}=0.2{times}10{sup {minus}5} at {theta}=150{degree} based on a conservative value of 0.1 eV for the parity-nonconservation matrix element. A proposal for an experimental investigation is sketched.

• OSTI ID: 5607751
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 44:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ANALYZING POWER
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON REACTIONS
BEAMS
CARBON 12
CARBON ISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DECAY
DISTRIBUTION
ENERGY LEVELS
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
FUNCTIONS
HADRON REACTIONS
ISOSPIN
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MATRIX ELEMENTS
NITROGEN 15 TARGET
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
OXYGEN 16
OXYGEN ISOTOPES
PARITY
PARTICLE PROPERTIES
POLARIZED BEAMS
PROTON REACTIONS
SHELL MODELS
SPIN
STABLE ISOTOPES
TARGETS