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EDM in ground state (I=1/2)

Electric Dipole Moment:. e h 2 m c. d =  I. EDM in ground state (I=1/2). H = -( d E + μ B ) · I/ I. parallel. anti-parallel. m I = 1/2. B. E. B. E. 2 ω 1. 2 ω 2. m I = -1/2. ω 1. ω 2. Precession Frequency:.  = d · E / h.

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EDM in ground state (I=1/2)

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  1. Electric Dipole Moment: e h 2 m c d =  I EDM in ground state (I=1/2) H = -(d E+ μB) ·I/I parallel anti-parallel mI = 1/2 B E B E 2ω1 2ω2 mI = -1/2 ω1 ω2 Precession Frequency:  = d · E / h d = 10-26 e cm, E = 100 kV/cm,  w = 15 *10-6 rad/s

  2. 3D1 1P1 1D2 l 3 2 1 1 3D ● MOT signal ● Doppler-free beam signal /s] 150 6 [10 1S0 100 Rate 50 X 100 0 -80 -60 -40 -20 0 20 Detuning @ l1 [MHz] Laser cooling leaky systems: Barium Multiple repump transitions Efficient capture from atomic beam (>1%) Radium similar level scheme. Laser cooling approach transferable S. De et al., Phys. Rev. A 79 , 041402(R) (2009)

  3. Intrinsic sensitivity Radium 7s7p 1P1 EDM Enhancement over 199Hg ~ 40000 2 1 0 7s6d 1D2 3 2 1 7s6d 3D 7s7p 3P 482.7 nm 714.3 nm Octupole deformation for some isotopes (225Ra) enhancement 50-500 7s2 1S0 Radium Level Scheme

  4. 225Ra 7s21S0 _ 7s7p 1P1 Strong transition for efficient laser cooling 7s7p 1P1 Hyperfine Structure 4198(4) MHz F = 1/2 - F = 3/2 F = 1/2 - F = 3/2 2 1 0 7s6d 1D2 3 2 1 7s6d 3D 7s7p 3P 130Te2 130Te2 482.7 nm 714.3 nm Reference line in 130Te2 at 20715.4777 cm-1 7s2 1S0

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