New observation of parity nonconservation in atomic thallium

Journal Article · Mon Mar 09 04:00:00 EST 1981 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.46.640· OSTI ID:6535784

Bucksbaum, P; Commins, E; Hunter, L

Refined observations of parity nonconservation in the 6/sup 2/P/sub 1/2/-7/sup 2/P/sub 1/2/ transition in /sub 81/Tl/sup 203,205/ are reported. Absorption of circularly polarized 293-nm photons by 6/sup 2/P/sub 1/2/ atoms in an electric field results in polarization of the 7/sup 2/P/sub 1/2/ state, through interference of the Stark E1 amplitude with M1 and parity-nonconserving E1 amplitudes. Detection of this polarization yields the circular dichroism d = +(2.8 +- /sup 1.0//sub 0.9/) x 10/sup -3/, which agrees with theoretical estimates based on the Weinberg-Salam model, for sin/sup 2/q/sub W/ = 0.23.

• Research Organization: Physics Department, University of California, Berkeley, California 94720
• OSTI ID: 6535784
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 46:10; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
AMPLITUDES
ATOMS
DICHROISM
DIPOLES
ELEMENTARY PARTICLES
ELEMENTS
ENERGY ABSORPTION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
HEAVY NUCLEI
INVARIANCE PRINCIPLES
ISOTOPES
MASSLESS PARTICLES
METALS
MULTIPOLES
NUCLEI
ODD-EVEN NUCLEI
P INVARIANCE
P STATES
PHOTONS
POLARIZATION
STABLE ISOTOPES
THALLIUM
THALLIUM 203
THALLIUM 205
THALLIUM ISOTOPES