Experimental angular correlation test of time reversal invariance in neon 19. beta. decay

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:7185460

Schneider, M B

The results of a new test of time reversal invariance in /sup 19/Ne nuclear ..beta.. decay are reported. The triple angular correlation was investigated by observing the decay of polarized /sup 19/Ne. This correlation, whose amplitude is given by the R coefficient, should be zero if time reversal is a good symmetry, neglecting final state interactions. /sup 19/Ne was produced on line through the reaction /sup 19/F(p,n)/sup 19/Ne with 12 MeV protons from the Princeton Cyclotron. The sample was polarized through an atomic beam method and the beta polarimetry was performed with four identical Mott scattering polarimeters. The upper limit for the R coefficient, is 0.079 +/- 0.053 marginally consistent with time reversal invariance. This first measurement of this correlation in nuclear ..beta.. decay puts a corresponding limit on the value of Im (C/sub S/C/sub A/*) of 0.192 +/- 0.128. The quoted errors are purely statistical, one standard deviation errors. The principal systematic errors, both due to final state electromagnetic interactions and instrumental limitations are discussed. The possibilities for improvements in this experiment, principally in the area of more efficient methods of polarizing /sup 19/Ne, which could improve the result by as much as two orders of magnitude, are discussed.

• Research Organization: Princeton Univ., NJ (USA)
• OSTI ID: 7185460
• Country of Publication: United States
• Language: English

Related Subjects

651322* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Radioactive Decay-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
BARYON REACTIONS
BARYONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CORRELATIONS
DATA
DECAY
ELEMENTARY PARTICLES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FERMIONS
FLUORINE 19 TARGET
HADRON REACTIONS
HADRONS
INFORMATION
INVARIANCE PRINCIPLES
ISOTOPES
LIGHT NUCLEI
NEON 19
NEON ISOTOPES
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
POLARIZED TARGETS
PROTON REACTIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
T INVARIANCE
TARGETS