Atomic final state effects and a limit for time-reversal invariance in /sup 191/Ir

Journal Article · Sat Aug 01 04:00:00 EDT 1981 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.24.620· OSTI ID:6184839

Gimlett, J L; Henrikson, H E; Cheung, N K; Boehm, F

An experiment has been performed to test the time-reversal symmetry in the emission of the mixed E2 and M1 129 keV ..gamma.. transition in /sup 191/Ir. The phase angle associated with the imaginary part of the ratio of multipole transition amplitudes was measured through observation of the angular distribution of the linear polarization of the ..gamma.. ray from a /sup 191/Os source polarized at low temperature (20 to 30 mK obtained with a dilution refrigerator). A Compton polarimeter was used to measure linear polarization. Interaction of the ..gamma.. ray with the surrounding atomic electrons is expected to give rise to a phase shift xi indistinguishable from the time-reversal phase eta. In the present experiment we have observed a phase angle (eta+xi) = (-4.8 +- 0.2) x 10/sup -3/ for the 129 keV ..gamma.. ray. This value is in good agreement with the most recent calculations of the atomic final state interaction xi = (-4.3 +- 0.4) x 10/sup -3/. Assuming the validity of the calculated xi, a limit Vertical BaretaVertical Bar<10/sup -3/ is deduced, consistent with time-reversal invariance.

• Research Organization: Norman Bridge Laboratory of Physics 161-33, California Institute of Technology, Pasadena, California 91125
• OSTI ID: 6184839
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 24:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

640302 -- Atomic
Molecular &amp; Chemical Physics-- Atomic &amp; Molecular Properties &amp; Theory
651923* -- Nuclear Properties &amp; Reactions
A=190-219
Experimental-- Energy Levels &amp; Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
E2-TRANSITIONS
ELECTRODYNAMICS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
FIELD THEORIES
GAMMA RADIATION
HEAVY NUCLEI
INELASTIC SCATTERING
INVARIANCE PRINCIPLES
IONIZING RADIATIONS
IRIDIUM
IRIDIUM 191
IRIDIUM ISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
M1-TRANSITIONS
METALS
MULTIPOLE TRANSITIONS
NUCLEI
ODD-EVEN NUCLEI
PHASE SHIFT
PLATINUM METALS
POLARIZATION
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
RADIATIONS
RADIOISOTOPES
REFRACTORY METALS
SCATTERING
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
T INVARIANCE
THOMSON SCATTERING
TRANSITION ELEMENTS