Isovector parity mixing in sup 20 Ne

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.R1336· OSTI ID:6901521

Kniest, N; Huttel, E; Pfaff, E; Reiter, G; Clausnitzer, G ^[1]

---

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

The parity- and isospin-forbidden {alpha}{sub 0} decay from {sup 20}Ne{sup *}({ital J}{sup {pi}}=1{sup +}; {ital T}=1; {ital E}{sub {ital x}}=13.482 MeV) to {sup 16}O(g.s.) has been investigated by measurement of the longitudinal analyzing power {ital A}{sub {ital z}} of the reaction {sup 19}F({ital {rvec p}},{alpha}{sub 0}){sup 16}O around the 1{sup +} resonance in {sup 20}Ne{sup *}. With the data, the range for the expected interference effect has been reduced to {ital A}{sub {ital z}}=(15.0{plus minus}7.6){times}10{sup {minus}4} (68% c.l.), significantly smaller than a previous result. An analysis for the new data and those of related experiments has been performed to extract upper limits for the irregular {alpha}{sub 0} width {Gamma}{sub {alpha}0}{sup PNC} and the weak pion nucleon coupling constant {ital f}{sub {pi}}, being smaller than previous theoretical expectations.

• OSTI ID: 6901521
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
ALGEBRAIC CURRENTS
ALPHA DECAY
ANALYZING POWER
BARYON REACTIONS
BASIC INTERACTIONS
BEAMS
CHARGED-PARTICLE REACTIONS
COUPLING CONSTANTS
CURRENTS
DECAY
EVEN-EVEN NUCLEI
FLUORINE 19 TARGET
HADRON REACTIONS
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
NEON 20
NEON ISOTOPES
NEUTRAL CURRENTS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARITY
PARTICLE PROPERTIES
POLARIZED BEAMS
PROTON REACTIONS
STABLE ISOTOPES
TARGETS
WEAK INTERACTIONS
WEAK-COUPLING MODEL