Calculation of the parity--nonconserving effects in the 6(2)P(1/2)-7(2)P(1/2) forbidden M1 transition in thalium
Sep, 197719 pages
Published in:
- Phys.Rev.A 16 (1977) 844-862
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Abstract: (APS)
Calculations are presented of the E1 amplitude expected in the 6P122−7P122 forbidden M1 transition in Tl if parity conservation is violated in the neutral weak e−N interaction, as proposed in a number of gauge models, including that of Weinberg and Salam. Valence-electron wave functions are generated as numerical solutions to the Dirac equation in a modified Tietz central potential. These wave functions are used to calculate allowed E1 oscillator strengths, hfs splittings, and Stark E1 transition amplitudes. These results are compared with experiment and the agreement is generally good. The relativistic 6P122−7P122 M1 transition amplitude m is also calculated, and corrections due to interconfiguration mixing, Breit interaction, and hfs mixing are included. The result, mtheor=(−3.2±1.0)×10−5|e|ℏ2mec, is in agreement with the experimental value, mexpt=(−2.11±0.30)×10−5|e|ℏ2mec. The parity-nonconserving E1 amplitude EPN is calculated, and a value for the circular dichroism, δ≃2Im(EPN,theo)mexpt=2.6×10−3, is obtained. Parity-nonconserving effects in other Tl transitions are discussed.References(39)
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