期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.200802
关键词
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资金
- U.S. DOE [DE-AC0205CH11231]
- UCLRP [09-LR-04-120497-HUDE]
We describe a novel approach to directly measure the energy of the narrow, low-lying isomeric state in Th-229. Since nuclear transitions are far less sensitive to environmental conditions than atomic transitions, we argue that the Th-229 optical nuclear transition may be driven inside a host crystal with a high transition Q. This technique might also allow for the construction of a solid-state optical frequency reference that surpasses the short-term stability of current optical clocks, as well as improved limits on the variability of fundamental constants. Based on analysis of the crystal lattice environment, we argue that a precision (short-term stability) of 3 x 10(-17) < Delta f/f < 1 x 10(-15) after 1 s of photon collection may be achieved with a systematic-limited accuracy (long-term stability) of Delta f/f similar to 2 x 10(-16). Improvement by 10(2) - 10(3) of the constraints on the variability of several important fundamental constants also appears possible.
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