[1] Hong F L, Takamoto M, Higashi R, et al. Frequency measurement of a Sr lattice clock using an SI-second-referenced optical frequency comb linked by a global positioning system (GPS) [J]. Opt. Expr., 2005, 13(14): 5253-5262.
[2] Ido T, Loftus T H, Boyd M M, et al. Precision spectroscopy and density-dependent frequency shifts in ultracold Sr [J]. Phys. Rev. Lett., 2005, 94(15): 153001.
[3] Marion H, Pereira D S F, Abgrall M, et al. Search for variations of fundamental constants using atomic fountain clocks [J]. Phys. Rev. Lett., 2003, 90(15): 150801.
[4] Blatt S, Ludlow A D, Campbell G K, et al. New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks [J]. Phys. Rev. Lett., 2008, 100(14): 140801.
[5] Ludlow A D, Zelevinsky T, Campbell G K, et al. Sr lattice clock at 1×1016 fractional uncertainty by remote optical evaluation with a Ca clock [J]. Science, 2008, 319(5871): 1805-1808.
[6] Wilpers G, Oates C, Hollberg L. Improved uncertainty budget for optical frequency measurements with microkelvin neutral atoms: Results for a high-stability 40Ca optical frequency standard [J]. Appl. Phys. B, 2006, 85(1): 31-44.
[7] Barber Z W, Hoyt C W, Oates C W, et al. Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice [J]. Phys. Rev. Lett., 2006, 96(8): 083002.
[8] Barber Z W, Stalnaker J E, Lemke N D, et al. Optical lattice induced light shifts in an Yb atomic clock [J]. Phys. Rev. Lett., 2008, 100(10): 103002.
[9] De S, Dammalapati U, Jungmann K, et al. Magneto-optical trapping of barium [J]. Phys. Rev. A, 2009, 79(4): 041402.
[10] Dzuba V A, et al. Calculations of energy levels and lifetimes of low-lying states of barium and radium [J]. Phys. Rev. A, 2006, 73(3): 032503.
[14] Brust J, Gallagher A C. Excitation transfer in barium by collisions with noble gases [J]. Phys. Rev. A, 1995, 52(3): 2120-2131.
[15] Scielzo N D, Guest J R, Schulte E C, et al. Measurement of the lifetimes of the lowest 3P1 state of neutral Ba and Ra [J]. Phys. Rev. A, 2006, 73: 010501.
[16] Laksbmi P A, Agarwal G S. Optical Hanle effect in fields of arbitrary strength and bandwith [J]. Phys. Rev. A, 1981, 23(5): 2553-2562.
[17] Avan P, et al. Hanle resonances for a J=0 to J=1 transition excited by a fluctuating laser beam [J]. J. Phys. B, 1977, 10(2): 171-185.
[18] Atvars A, Auzinsh M, Gazazyan E A, et al. Implementation of a double-scanning technique for studies of the Hanle effect in rubidium vapor [J]. Eur. Phys. J. D, 2007, 44(3): 411-417.
[19] Brink G, et al. Lifetime measurement of the (5d6p) 3D3 state of barium by dye-laser spectroscopy [J]. Opt. Commun., 1980, 33(1): 17-22.
[20] Demtroder W. Laser Spectroscopy: Basic Concepts and Instrumentation [M]. 3nd ed., Berlin: Springer, 2003: 680-689.
[21] Kastler A. The Hanle effect and its use for the measurements of very small magnetic fields [J]. Nucl. Instrum. Methods, 1973, 110: 259-265.
[22] Guo B, Guan H, Qu W C, et al. Preliminary frequency measurement of the electric quadrupole transition in a single laser-cooled Ca + ion [J]. Front. Phys. China, 2009, 4(2): 144-154.
[23] Qi R, Yu X L, Li Z B, et al. Non-Abelian Josephson effect between two F=2 spinor Bose-Einstein condensates in double optical traps [J]. Phys. Rev. Lett., 2009, 102: 185301.
[24] Liang Z X, Zhang Z D, Liu W M. Dynamics of a bright soliton in Bose-Einstein condensates with time-dependent atomic scattering length in an expulsive parabolic potential [J]. Phys. Rev. Lett., 2005, 94: 050402.
[25] Andreev S V, Namozov B R, Koudinov A V, et al. Spin depolarization of holes and lineshape of the Hanle effect in semiconductor nanostructures [J]. Phys. Rev. B, 2009, 80: 113301.
[26] Ji A C, Liu W M, Song J L, et al. Dynamical creation of fractionalized vortices and vortex lattices [J]. Phys. Rev. Lett., 2008, 101: 010402.
[27] Sahli A, Melliti A, Maaref M A, et al. Spin lifetime from the Hanle effect and fine structure of excitonic levels in InAlAs/AlGaAs quantum dots [J]. Phys. Status Solidi B, 2007, 224: 2622-2628.