Precise Measurement of Parity Nonconserving Optical Rotation in Atomic Thallium

Journal Article · Mon Apr 03 00:00:00 EDT 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.74.2654· OSTI ID:44848

Edwards, N H; Phipp, S J; Baird, P E.G.; Nakayama, S ^[1]

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1. Clarendon Laboratory, Parks Road, Oxford OX1 3PU (United Kingdom)

We report a new measurement of parity nonconserving (PNC) optical rotation on the 6{ital p}{sub 1/2}-6{ital p}{sub 3/2} transition in atomic thallium near 1283 nm. The result expressed in terms of the quantity R=Im{l_brace}{ital E}1{sup PNC}/{ital M}1{r_brace} is {minus}(15.68{plus_minus}0.45){times}10{sup {minus}8}, and is consistent with current calculations based on the standard model. In addition, limits have been set on the much smaller nuclear spin-dependent rotation amplitude at R{sub {ital S}}=(0.04{plus_minus}0.20){times}10{sup {minus}8}; this is consistent with theoretical estimates which include a nuclear anapole contribution.

• OSTI ID: 44848
• Journal Information: Physical Review Letters, Vol. 74, Issue 14; Other Information: PBD: 3 Apr 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
THALLIUM
ROTATION
OPTICAL ACTIVITY
ATOMS
PARITY
STANDARD MODEL
SPIN
E1-TRANSITIONS
M1-TRANSITIONS
TRANSITION AMPLITUDES
VIOLATIONS