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1. T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, and J. C. Bergquist, "Frequency ratio of Al⁺ and Hg⁺ single-ion optical clocks; Metrology at the 17th decimal place," Science 319, 1808 - 1812 (2008). PDF file

2. D. B. Hume, T. Rosenband, and D. J. Wineland, "High-fidelity adaptive qubit detection through repetitive quantum nondemolition measurements," Phys. Rev. Lett. 99, 120502-1 - 120502-4 (2007). PDF file

3. T. Rosenband, P. O. Schmidt, D. B. Hume, W. M. Itano, T. M. Fortier, J. E. Stalnaker, K. Kim, S. A. Diddams, J. C. J. Koelemeij, J. C. Bergquist, and D. J. Wineland, "Observation of the ¹S₀ to ³P₀ clock transition in ²⁷Al⁺," Phys. Rev. Lett. 98, 220801-1 - 220801-4 (2007). PDF file

4. T. M. Fortier, N. Ashby, J. C. Bergquist, M. J. Delaney, S. A. Diddams, T. P. Heavner, L. Hollberg, W. M. Itano, S. R. Jefferts, K. Kim, F. Levi, L. Lorini, W. H. Oskay, T. E. Parker, J. Shirley, and J. E. Stalnaker, "Precision atomic spectroscopy for improved limits on variation of the fine structure constant and local position invariance," Phys. Rev. Lett. 98, 070801-1 - 070801-4 (2007). PDF file

5. T. Rosenband, W. M. Itano, P. O. Schmidt, D. B. Hume, J. C. J. Koelemeij, J. C. Bergquist, and D. J. Wineland, "Blackbody radiation shift of the ²⁷Al^{+ 1}S₀ to ³P₀ transition," in Proceedings of the 20th European Time and Frequency Forum, 2006, p. 289-291. PDF file

6. W.H. Oskay, S. A. Diddams, E. A. Donley, T. M. Fortier, T. P. Heavner, L. Hollberg, W.M. Itano, S. R. Jefferts, M. J. Delaney, K. Kim, F. Levi, T. E. Parker, and J.C. Bergquist, "Single-atom optical clock with high accuracy," Phys. Rev. Lett. 97, 020801-1 - 020801-4 (2006). PDF file

7. W.M. Itano, "Quadrupole moments and hyperfine constants of metastable states of Ca⁺, Sr⁺, Ba⁺, Yb⁺, Hg⁺, and Au" Phys. Rev. A 73, 022510-1 - 022510-11 (2006). PDF file

8. P. O. Schmidt, T. Rosenband, C. Langer, W. M. Itano, J. C. Bergquist, and D. J. Wineland, "Spectroscopy using quantum logic," Science 309, 749-752 (2005). PDF file

9. W.H. Oskay, W.M. Itano, and J.C. Bergquist, "Measurement of the ¹⁹⁹Hg⁺ 5d⁹6s^{2 2}D_5/2 electric quadrupole moment and a constraint on the quadrupole shift," Phys. Rev. Lett. 94, 163001-1 - 163001-4 (2005). PDF file

10. W.H. Oskay, A. Bartels, S.A. Diddams, C.W. Oates, G. Wilpers, L. Hollberg, D.J. Wineland, W.M. Itano, C.E. Tanner, and J.C. Bergquist, "The mercury-ion optical clock: Towards a measurement of the quadrupole shift," Proc. 18th European Frequency and Time Forum, (CDROM), (2004) 4p. PDF file

11. J. Ye, J.-L. Peng, R. J. Jones, K. W. Holman, J. L. Hall, D. J. Jones, S. A. Diddams, J. Kitching, S. Bize, J. C. Bergquist, L. W. Hollberg, L. Robertsson, and L.-S. Ma, "Delivery of high-stability optical and microwave frequency standards over an optical fiber network," J. Opt. Soc. Am. 20, 1459-1467 (2003). PDF file

12. S. Bize, S. A. Diddams, U. Tanaka, C. E. Tanner, W. H. Oskay, R. E. Drullinger, T. E. Parker, T. P. Heavner, S. R. Jefferts, L. Hollberg, W. M. Itano, and J. C. Bergquist, "Testing the stability of fundamental constants with the ¹⁹⁹Hg⁺ single-ion optical clock," Phys. Rev. Lett. 90, 150802-1 - 150802-4 (2003). PDF file

13. U. Tanaka, S. Bize, C. E. Tanner, R. E. Drullinger, S. A. Diddams, L. Hollberg, W. M. Itano, D. J. Wineland, and J. C. Bergquist, "The ¹⁹⁹Hg⁺ single ion optical clock: recent progress," J. Phys. B 36, 545-551 (2003). PDF file

14. W. H. Oskay, S. Bize, S. A. Diddams, R. E. Drullinger, T. P. Heavner, L. Hollberg, W. M. Itano, S. R. Jefferts, T. E. Parker, U. Tanaka, C. E. Tanner, and J. C. Bergquist, "The mercury-ion optical clock and the search for temporal variation of fundamental constants," Proc. 2003 Joint Meeting IEEE International Frequency Control Symposium and EFTF Conference, 78-81 (2003). PDF file

15. D. J. Wineland, J. C. Bergquist, T. Rosenband, P. O. Schmidt, W. M. Itano, J. J. Bollinger, D. Leibfried, and W. H. Oskay, "Ion optical clocks and quantum information processing," Proc. 2003 Joint Meeting IEEE International Frequency Control Symposium and EFTF Conference, 68-71 (2003). PDF file

16. U. Tanaka, J. C. Bergquist, S. Bize, S. A. Diddams, R. E. Drullinger, L. Hollberg, W. M. Itano, C. E. Tanner, and D. J. Wineland, "Optical frequency standards based on the ¹⁹⁹Hg⁺ ion," IEEE Trans. Instrum. Meas. 52, 245-249 (2003). PDF file

17. L. Hollberg, S. Diddams, C. Oates, A. Curtis, S. Bize, and J. Bergquist, "Atomic clocks of the future: using the ultrafast and the ultrastable," Proceedings of the 2002 Ultrafast Phenomena Meeting, p. 170-174. PDF file

18. D. J. Wineland, J. C. Bergquist, J. J. Bollinger, R. E. Drullinger, and W. M. Itano, "Quantum computers and atomic clocks," Proceedings of the 6th Symposium on Frequency Standards and Metrology, Edited by P. Gill (World Scientific, Singapore, 2002), p. 361-368. PDF file

19. J. C. Bergquist, U. Tanaka, R. E. Drullinger, W. M. Itano, D. J. WIneland, S. A. Diddams, L. Hollberg, E. A. Curtis, C. W. Oates and Th. Udem, "A mercury-ion optical clock," Proceedings of the 6th Symposium on Frequency Standards and Metrology, Edited by P. Gill (World Scientific, Singapore, 2002), p. 99-105. PDF file

20. S. A. Diddams, Th. Udem, K. R. Vogel, L.-S. Ma, L. Robertsson, C. W. Oates, E. A. Curtis, W. M. Itano, R. E. Drullinger, D. J. Wineland, J. C. Bergquist, and L. Hollberg, "A femtosecond-laser-based optical clockwork," Proceedings of the 6th Symposium on Frequency Standards and Metrology, Edited by P. Gill (World Scientific, Singapore, 2002), p. 419-426. PDF file

21. J. C. Bergquist, S. A. Diddams, C. W. Oates, E. A. Curtis, L. Hollberg, R. E. Drullinger, W. M. Itano, D. J. Wineland, and Rh. Udem, "A single ¹⁹⁹Hg⁺ ion optical clock," in Laser Spectroscopy, Proceedings of the XV International Conference, Snowbird, Utah, 10-15 June 2001, edited by S. Chu, V. Vuletic, A. J. Kerman, and C. Chin (World Scientific, 2002) p. 106-114. PDF file

22. R. E. Drullinger, Th. Udem, S. A. Diddams, K. R. Vogel, C. W. Oates, E. A. Curtis, W. D. Lee, W. M. Itano, L. Hollberg, and J. C. Bergquist, "All optical atomic clocks based on a single mercury ion and calcium atoms," Proc. 15th European Frequency and Time Forum, Neuchatel, Switzerland, March 6-8, 2001 (Swiss Foundation for Research in Microtechnology, Neuchatel, Switzerland, 2001) p. 441-445. PDF file

23. J.C. Bergquist, S. R. Jefferts, and D. J. Wineland,"Time measurement at the millennium," Physics Today 54, 37-42 (March 2001) PDF file

24. S.A.Diddams, Th. Udem, K.R. Volgel, C.W. Oates, E.A. Curtis, W.D. Lee, W.M. Itano, R.E. Drullinger, J.C. Bergquist, and L. Hollberg,"An Optical Clock Based on a Single Trapped ¹⁹⁹Hg⁺ Ion," Science 293, 825-293 (2001) PDF file

25. J.C. Bergquist, R.J. Rafac, B.C. Young, J.A. Beall, W.M. Itano, and D.J. Wineland, "Sub-dekahertz spectroscopy of ¹⁹⁹Hg⁺," Proc. SPIE, 4269, 1-7 (2001) edited by J. L. Hall and J. Ye. PDF file

26. S.A. Diddams, Th. Udem, K.R. Vogel, C.W. Oates, E.A. Curtis, R.S. Windeler, A. Bartels, J.C. Bergquist, and L. Hollberg, "A compact femtosecond-laser-based optical clockwork," Proc. SPIE, 4269, 77-83 (2001), edited by J. L. Hall and J. Ye. PDF file

27. W.M. Itano, "External-field shifts of the ¹⁹⁹Hg⁺ optical frequency standard," J. Res. NIST. 105, 829-837 (2001). PDF file

28. L. Hollberg, C.W. Oates, E.A. Curtis, E.N. Ivanov, S.A. Diddams, Th. Udem, H.G. Robinson, J.C. Bergquist, W.M. Itano, R.E. Drullinger, and D.J. Wineland, "Optical Frequency Standards and Measurements," IEEE J. Quantum Electronics 37, 1502-1513 (2001). PDF file

29. K.R. Vogel, S.A. Diddams, C.W. Oates, E.A. Curtis, R.J. Rafac, W.M. Itano, J.C. Bergquist, R.W. Fox, W.D. Lee, J.S. Wells, and L. Hollberg, "Direct comparison between two cold-atom-based optical frequency standards using a femtosecond-laser comb," Opt. Lett. 26, 102-104 (2001). PDF file

30. D.B. Sullivan, J.C. Bergquist, R.E. Drullinger, W.M. Itano, S.R. Jefferts, W.D. Lee, D.M. Meekhof, T.E. Parker, F.L. Walls, and D.J. Wineland, "Primary Atomic Frequency Standards at NIST," NIST J. of Research 106, 47-63 (2001). PDF file

31. R.E. Drullinger, Th. Udem, S.A. Diddams, K.R. Vogel, C.W. Oates, E.A. Curtis, "All-Optical Atomic Clocks," Proc. 2001 IEEE Intl. Frequency Control (Seattle, USA) 69-75. PDF file

32. Th. Udem, S.A. Diddams, K.R. Vogel, C.W. Oates, E.A. Curtis, W.D. Lee, W.M. Itano, R.E. Drullinger, J.C. Bergquist, and L. Hollberg, "Absolute frequency measurements of the Hg⁺ and Ca optical clock transitions with a femtosecond laser," Phys. Rev. Lett. 86, 4996 (2000). PDF file

33. R.J. Rafac, B.C. Young, J.A.Beall, W.M. Itano, D.J. Wineland, and J.C. Bergquist, "Sub-dekahertz ultraviolet spectroscopy of ¹⁹⁹ Hg⁺," Phys. Rev. Lett. 85, 2462 (2000). PDF file

34. B. Frech, J.S. Wells, C.W. Oates, J. Mitchell, Y.-P. Lan, T. Kurosu, L.R. Zink, L. Hollberg, T.P. Zibrova, B.C. Young, and J.C. Bergquist, "Sub-Systems for Optical Frequency Measurements: Application to the 282-nm¹⁹⁹ Hg⁺ Transiton and the 657-nm Ca Line," IEEE Trans. Ultrasonics, Ferroelectrics, and Freq. Cont., 47, 513-517 (2000). PDF file

35. Th. Udem, S.A. Diddams, K.R. Vogel, C.W. Oates, E.A. Curtis, W.D. Lee, W.M. Itano, R.E. Drullinger, J.C. Bergquist, and L. Hollberg, "Absolute frequency measurements of the Hg⁺ and Ca optical clock transitions with a femtosecond laser," Phys. Rev. Lett. 86, 4996 (2000). PDF file

36. B. C. Young, R. J. Rafac, J. A. Beall, F. C. Cruz, W. M. Itano, D. J. Wineland, and J. C. Bergquist, "Hg⁺ optical frequency standard: Recent progress" in Laser Spectroscopy, proceedings of the XIV International Conference, edited by R. Blatt, J. Eschner, D. Leibfried, and F. Schmidt-Kaler (World Scientific, Singapore, 1999) p. 61-70. PDF file

37. B.C. Young, F.C. Cruz, W.M. Itano, and J.C. Bergquist, "Visible lasers with subhertz linewidths," Phys. Rev. Lett. 82, 3799 (1999). PDF file

38. B. C. Young, F. C. Cruz, D. J. Berkeland, R. J. Rafac, J. C. Bergquist, W. M. Itano, and D. J. Wineland, "Lasers for an optical frequency standard using trapped Hg⁺ ions," Trapped Charged Particles and Fundamental Physics, AIP Conf. Proc. 457, edited by D. H. E. Dubin and D. Schneider (American Institute of Physics, Woodbury, NY, 1999), p. 337-342. PDF file

39. B. Frech, J.S. Wells, C.W. Oates, J.B. Mitchell, L. Hollberg, Y. Lan, T. Kurosu, L.R. Zink, B.C. Young, and J.C. Bergquist, " Sub-Systems for Optical Frequency Measurements: Applications to the 282 nm¹⁹⁹ Hg⁺ Transition and the 657 nm Ca Line," Proc. Joint Mtg. 13th European Freq. and Time and 1999 IEEE Int. Freq. Cont. Symp. (Besancon, France) 630-635. PDF file

40. R.J. Rafac, B.C. Young, F.C. Cruz, J.A. Beall, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "¹⁹⁹Hg⁺ Optical Frequency Standard: Progress Report," Proc. Joint Mtg. 13th European Frequency and Time Forum and 1999 IEEE Int. Freq. Cont. Symp. (Besancon, France), 676-681. PDF file

41. D.J. Berkeland, J.D. Miller, F.C. Cruz, B.C. Young, R.J. Rafac, X.-P. Huang, W.M. Itano, J.C. Bergquist, and D.J. Wineland, "High-resolution, high-accuracy spectroscopy of trapped ions," in Atomic Physics 16, proceedings of the International Conference, edited by W.E. Baylis and G.W.F. Drake, (AIP Press, 1999), pp. 29-41. PDF file

42. D. J. Berkeland, J. D. Miller, F. C. Cruz, B. C. Young, J. C. Bergquist, W. M. Itano, and D. J. Wineland, "High-accuracy microwave and optical frequency standards using laser-cooled Hg⁺ ions," Proc. 2nd Int. Symp. on Modern Problems of Laser Physics, edited by S. N. Bagayev and V. I. Denisov, Laser Physics 8, 673-678 (1998). PDF file

43. F.C. Cruz, B.C. Young, and J.C. Bergquist, "Diode-pumped Nd: FAP Laser at 1.126 μm: A Possible Local Oscillator for a Hg⁺ Optical Frequency Standard," Appl. Opt., 37, 7801-7804 (1998). PDF file

44. D.J. Berkeland, J.C. Bergquist, W.M. Itano, J.D. Miller, B.C. Young, and D.J. Wineland, " High-Performance Trapped Hg⁺ Frequency Standards," CPEM '98 Digest (Washington DC, USA), 321-322. PDF file

45. B.C. Young, D.J. Berkeland, F.C. Cruz, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "Lasers for a Trapped Hg⁺ Optical Frequency Standard," CPEM '98 Digest (Washington DC, USA), 153-154. PDF file

46. D.J. Berkeland, J.D. Miller, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "High-Accuracy Frequency Standards Using Laser-Cooled Hg⁺ Ions," 1998 Intl. Freq. Cont. Symp. (Pasadena, USA), 32-36. PDF file

47. D.J. Berkeland, J.D. Miller, B.C. Young, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "High-accuracy frequency standards using laser-cooled Hg⁺ ions," Methods for Ultrasensitive detection, edited by B.L. Fearey, SPIE Conf. Proc. 3270 pp. 138-146 (1998). PDF file

48. D.J. Berkeland, J.D. Miller, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "Minimization of ion micromotion in a Paul trap," J. Appl. Phys. 83, 5025 (1998). PDF file

49. D.J. Berkeland, J.D. Miller, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "Laser-cooled mercury ion trap frequency standard," Phys. Rev. Lett. 80, 2089 (1998). PDF file

50. D.J. Berkeland, J.D. Miller, F.C. Cruz and J.C. Bergquist, W.M. Itano, and D.J. Wineland, "High-accuracy microwave and optical frequency standards in cryogenic linear ion traps," in Proc. Workshop on the Scientific Applications of Clocks in Space, November 7-8, 1996, edited by L. Maleki, JPL Publ. 97-15 (Jet Propulsion Laboratory, 1997) pp. 133-142. PDF file

51. D.J. Berkeland, F.C. Cruz and J.C. Bergquist, "Sum-frequency generation of continuous-wave light at 194 nm," Appl. Opt. 36, 4159-4162 (1997). PDF file

52. J. H. Marquardt, F. C. Cruz, M. Stephens, C. W. Oates, L. Hollberg, J. C. Bergquist, D. F. Welch, D. Mehuys, and S. Sanders, "Grating-tuned semiconductor MOPA lasers for precision spectroscopy," in Application of tunable diode and other infrared sources for atmospheric studies and industrial process monitoring, edited by A. Fried, Proc. SPIE 2834, 34-40 (1996). PDF file

53. A. Steinbach, M. Rauner, F. C. Cruz, and J.C. Bergquist, "CW second harmonic generation with elliptical Gaussian beams," Opt. Commun. 123, 207-214 (1996). PDF file

54. M.E. Poitzsch, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "Cryogenic linear ion trap for accurate spectroscopy," Rev. Sci. Instrum. 67, 129-134 (1996). PDF file

55. J.D. Miller, D.J. Berkeland, F.C. Cruz, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "A cryogenic linear ion trap for ¹⁹⁹Hg⁺ frequency standards," Proc. 1996 IEEE International Frequency Control Symposium (copies available from IEEE Service Center, 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331), pp. 1086-1088. PDF file

56. J.D. Miller, M.E. Poitzsch, F.C. Cruz, D.J. Berkeland, J.C. Bergquist, W.M. Itano, and D.J. Wineland, "A Cryogenic Linear Ion Trap for ¹⁹⁹Hg⁺ Frequency Standards," 1995 IEEE Int. Freq. Cont. Sym. (San Francisco, USA), 110-112. PDF file

57. J.J. Bollinger, J.D. Prestage, W.M. Itano, and D.J. Wineland, "Laser-Cooled-Atomic Frequency Standard," Phys. Rev. Lett. 54, 1000-1003 (1995). PDF file

58. D.J. Wineland, J.C. Bergquist, D. Berkeland, J.J. Bollinger, F.C. Cruz, W.M. Itano, B.M. Jelenkovic, B.E. King, D.M. Meekhof, J.D. Miller, C.R. Monroe, and J.N. Tan, " Application of Laser-Cooled Ions to Frequency Standards and Metrology Proc. Fifth Symp. on Frequency Standards and Metrology, Woods Hole, MA, Oct. 16-19, pp. 11-19 (1995). PDF file

59. W.M. Itano, "High-Magnetic-Field Corrections to Cesium Hyperfine Structure," Proc. Fifth Symp. on Frequency Standards and Metrology, Woods Hole, MA, Oct. 16-19, pp. 503-504 (1995). PDF file

60. J.J. Bollinger, D.J. Wineland, W.M. Itano, and D.J. Heinzen, "Spin Squeezing Applied to Frequency Standards," Proc. Fifth Symp. on Frequency Standards and Metrology, Woods Hole, MA, Oct. 16-19, pp.107-113 (1995). PDF file

61. J. N. Tan, J.J. Bollinger, and D.J. Wineland, "Minimizing time dilation in Penning trap ion clocks," Proc. Fifth Symp. on Frequency Standards and Metrology, Woods Hole, MA, Oct. 16-19, pp.427-429 (1995). PDF file

62. J.N. Tan, J.J. Bollinger, and D.J. Wineland, "Minimizing the time-dilation shift in Penning trap atomic clocks," IEEE Trans. Instrum. Meas. 44, 144-147 (1995). PDF file

63. M.E. Poitzsch, J.C. Bergquist, W.M. Itano, and D.J. Wineland ," Progress Toward a Cryogenic ¹⁹⁹Hg⁺ Ion Frequency Standard," Digest of 1994 Conference on Precision Electromagnetic Measurements (Boulder, USA) 31-32. PDF file

64. M.E. Poitzsch, J.E. Bergquist, W.M. Itano, and D.J. Wineland," Progress on a Cryogenic Linear Trap for ¹⁹⁹Hg⁺ Ions," Proc. 1994 IEEE Int. Freq. Control Symp. (Boston, USA), 744-746. PDF file

65. W.M. Itano and N.F. Ramsey, "The Accurate Measurement of Time," Sci. Am., 269, 56-65 (1993). PDF file

66. J.C. Bergquist, W.M. Itano, and D.J. Wineland, "Laser Stabilization to a Single Ion," Proc. Varenna School (Int. School of Physics), Enrico Fermi, Italy, June 23-July 3, 1992, in Frontiers in Laser Spectroscopy, T.W. Hansch and M. Inguscio, eds. (North Holland), pp. 359-376 (1992). PDF file

67. M.C. Raizen, J.C. Bergquist, J.M. Gilligan, W.M. Itano, and D.J. Wineland, "Linear Trap for High-Accuracy Spectroscopy of Stored Ions," J. Modern Optics 39, 233-242 (1992). PDF file

68. W.M. Itano, "Atomic Ion Frequency Standards," Proc. IEEE, 79, 936-942 (1991). PDF file

69. J.C. Bergquist, W.M. Itano, D.J. Wineland, F. Diedrich, F. Elsner, and M.G. Raizen, "Single Ion Optical Frequency Standard," Proc. 45th Ann. Symp. Freq. Control (Los Angeles, USA), 524-538 (1991). PDF file

70. J.J. Bollinger, D.J. Heinzen, W.M. Itano, S.L. Gilbert, and D.J. Wineland, "A 303 MHz Frequency Standard Based on Trapped Be⁺ Ions," IEEE Trans. Instrum. Meas. 40, 126-128 (1991). PDF file

71. D.J. Wineland, W. M. Itano, J. C. Bergquist, J. J. Bollinger, D. J. Heinzen, C. H. Manney, F. L. Moore, M. G. Raizen, and C. S. Weimer, "Trapped-ion frequency standards," Proc. 1990 Precise Time and Time Interval Meeting, p. 53-60. PDF file

72. J.J. Bollinger, W.M. Itano, D.J. Heinzen, S.L. Gilbert, C.H. Manney, and M.G. Raizen, " Progress at NIST Toward Absolute Frequency Standards Using Stored Ions," IEEE Trans. Ultrason., Ferroeled., Freq. Cont. 37, 515-523 (1990). PDF file

73. J.C. Bergquist, W.M. Itano, F. Elsner, M.G. Raizen, and D.J. Wineland, "Single Ion Optical Spectroscopy," Proc. Light Induced Kinetic Effects on Atoms, Ions and Molecules Workshop (LIKE), Elba Island, Italy, May 2-5, pp. 291-299 (1990). PDF file

74. D.J. Wineland, J.C. Bergquist, W.M. Itano, F. Diedrich, and C.S. Weimer, "Frequency Standards in the Optical Spectrum," in The Hydrogen Atom G.F. Bassani, M. Inguscio, and T.W. Hansch, eds. (Springer Verlag), pp. 123-133 (1989). PDF file

75. J. A. Barnes and J. J. Bollinger, "Clocks, atomic and molecular," Encyclopedia of Physics, 2nd ed., edited by R. G. Lerner and G. L. Trigg (VCH Publ., Inc., New York, 1991), pp. 154-155. PDF file

76. J.C. Bergquist, F. Diedrich, W.M. Itano, and D.J. Wineland, "Hg⁺ Single Ion Spectroscopy," Proc. 9th Int. Laser Spectroscopy Conference, Laser Spectroscopy IX, M.S. Feld, J.E. Thomas, and A. Mooradian, eds. (Academic Press), pp. 274-277 (1989). PDF file

77. J. J. Bollinger, D. J. Wineland, W. M. Itano, J. C. Bergquist, and J. D. Prestage, "Frequency and time standards based on stored ions," Proc. 1988 Precise Time and Time Interval Meeting, p. 49-58. PDF file

78. J.C. Bergquist and S.Z. Xing, " Thermal Shifts of the Spectal Lines in the ⁴F_3/2 to ⁴I_11/2 Manifold of Nd: YAG Laser," IEEE J. Quantum Electron, 24, 1829-1832 (1988). PDF file

79. D.J. Wineland, W.M. Itano, J.C. Bergquist, J.J. Bollinger, F. Diedrich, and S.L. Gilbert, "High Accuracy Spectroscopy of Stored Ions, " Proc. 4th Symp. on Frequency Standards and Metrology, A. DeMarchi, ed. (Springer Verlag) Ancona, Italy, September 5-9, pp. 71-77 (1988). PDF file

80. J.C. Bergquist, F. Diedrich, W.M. Itano, and D.J. Wineland, "Hg⁺ Single Ion Spectroscopy," Proc. 4th Symp. of Frequency Standards and Metrology, Ancona, Italy, September 5-9, pp. 287-292 (1988). PDF file

81. J.J. Bollinger, S.L. Gilbert, W.M. Itano, and D.J. Wineland, "Frequency Standards Utilizing Penning Traps," Proc. 4th Symp. on Frequency Standards and Metrology, A. DeMarchi, ed. (Springer-Verlag) Ancona, Italy, September 5-9, pp. 319-325 (1988). PDF file

82. D.J. Wineland, W.M. Itano, J.C. Bergquist, and R.G. Hulet, "Laser Cooling Limits and Single Ion Spectroscopy," Phys. Rev. A 36, 2758-2762 (1987). PDF file

83. J.C. Bergquist, W.M. Itano, and D.J. Wineland, "Recoilless Optical Absorptions and Doppler Sidebands of a Single Trapped Ion," Phys. Rev. A 36, 428-430 (1987). PDF file

84. D.J. Wineland, "Frequency standards based on stored ions," Proc. I. E. E. E. 74, 147-150 (1987). PDF file

85. J.C. Bergquist, D.J. Wineland, W.M. Itano, H. Hemmati, H.-U. Daniel, and G. Leuchs, " Doppler-Free Two-Photon Laser Spectroscopy of HgII," Proc. 39th Ann. Symp. Frq. Control (Philadelphia, USA), 85-87 (1986). PDF file

86. J.C. Bergquist, D.J. Wineland, W.M. Itano, H. Hemmati, H.-U. Daniel, and G. Leuchs, "Energy and Radiative Lifetime of the 5d⁹6s²²D_5/2 State in HgII by Doppler-Free Two Photon Laser Spectroscopy," Phys. Rev. Lett 55, 1567-1570 (1985). PDF file

87. J.J. Bollinger, J.D. Prestage, W.M. Itano, and D.J. Wineland, "Laser-cooled-atomic frequency standard," Phys. Rev. Lett. 54, 1000-1003 (1985). PDF file

88. D.J. Wineland, "Spectroscopy of stored ions," in Precision Measurement and Fundamental Constants II, edited by B. N. Taylor and W. D. Phillips, NBS Spec. Pub. 617 (1984), p. 83-92. PDF file

89. W. M. Itano, D.J. Wineland, J. C. Bergquist, and F. L. Walls, "Progress toward a stored ion frequency standard at the National Bureau of Standards," in Precision Measurement and Fundamental Constants II, edited by B. N. Taylor and W. D. Phillips, NBS Spec. Pub. 617 (1984), p. 93-97. PDF file

90. H. Hemmati, J.C. Bergquist, and W.M. Itano, "Generation of Continuous-Wave 194-nm Radiation by Sum-Freauency Mixing in an External Ring Cavity," Opt. Lett, 8, 73-75 (1983). PDF file

91. D. J. Wineland, W.M. Itano, J. C. Bergquist, and H. Hemmati, "Frequency standard research using stored ions," in Laser-Cooled and Trapped Ions, Proceedings of the Workshop on Spectroscopic Applications of Slow Atomic Beams, edited by W. D.Phillips, NBS Spec. Pub. 653 (1983), p. 19-25. PDF file

92. J.J. Bollinger, W.M. Itano, and D.J. Wineland, "Laser Cooled ⁹Be⁺ Accurate Clock," Proc. 37th Ann. Symp. Freq. Control (Philadelphia, USA), 37-41 (1983). PDF file

93. W.M. Itano, D.J. Wineland, H. Hemmati, J.C. Bergquist, and J.J. Bollinger, "Time and Frequency Standards Based on Charged Particle Trapping," IEEE Trans. Nucl. Sci. 30, 1521-1523 (1983). PDF

94. D.J. Wineland, W.M. Itano, J.C. Bergquist, and F.L. Walls, "Proposed Stored ²⁰¹Hg⁺ Ions Frequency Standards," Proc. 35th Ann. Symp. Frq. Contro. (Philadelphia, USA), 602-611 (1981). PDF file

95. D.J. Wineland, J.C. Bergquist, R.E. Drullinger, H. Hemmati, W.M. Itano and F.L. Walls, "Laser Cooled, Stored Ion Experiments at NBS and Possible Applications to Microwave and Optical Frequency Standards," J. Phys. Colloque C8 , 307-313 (1981). PDF file

96. W.M. Itano, L.L. Lewis, and D.J. Wineland, "Shift of ²S_1/2 Hyperfine Splittings Due to Blackbody Radiation and Its Influence on Frequency Standards," J. Phys. (Paris) Colloque C8, 283-287 (1981). PDF file

97. D.J. Wineland, "Prospects for stored ion frequency standards," Proc. 1981 Precise Time and Time Interval Meeting, p. 579-591. PDF file

98. J.C. Bergquist and D.J. Wineland, "Laser to Microwave Frequency Division Using Synchrotron Radiation II," Symp. Freq. Control (Atlantic City, USA), 494-497 (1979). PDF file

99. D.J. Wineland, "Laser-To-Microwave Frequency Division Using Synchrotron Radiation," J. Appl. Phys. 50, 2528-2532 (1979). PDF file

100. F.L. Walls, D.J. Wineland, and R.E. Drullinger, "New Possibilities for Frequency Standards Using Laser Cooling and Detection of Stored Ions," Proc 32nd Ann. Symp. Freq. Control (Atlantic City, USA), 453-459 (1978). PDF file

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