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Many-body calculation of nuclear spin-dependent parity-nonconservingamplitude for (7s,F=4) --> (7s,F=5) transition between hyperfine sublevels ofthe ground state of $^{211}$Fr is carried out. The final result is <7s,F=5||d_PNC|| 7s,F=4> = -0.49 10^{-10} i kappa a.u., where kappa is thedimensionless coupling constant. This is approximately an order of magnitudelarger than similar amplitude in Cs. The dominant contribution to kappa isassociated with the anapole moment of the nucleus.Comment: 4 pages, submitted to Phys.Rev.

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Calculation of the nuclear spin-dependent parity-nonconserving amplitude for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn /><mml:mo>(</mml:mo><mml:mn>7</mml:mn><mml:mi>s</mml:mi><mml:mo>,</mml:mo><mml:mi>F</mml:mi><mml:mo>=</mml:mo><mml:mn>4</mml:mn><mml:mo>)</mml:mo><mml:mn /><mml:mo>→</mml:mo><mml:mn /><mml:mo>(</mml:mo><mml:mn>7</mml:mn><mml:mi>s</mml:mi><mml:mo>,</mml:mo><mml:mi>F</mml:mi><mml:mo>=</mml:mo><mml:mn>5</mml:mn><mml:mo>)</mml:mo><mml:mn…

Calculation of the nuclear spin-dependent parity-nonconserving amplitude for the(7s,F=4)→(7s,F=5)