18 results found
Dunseith DP, Truppe S, Hendricks RJ, et al., 2015, A high quality, efficiently coupled microwave cavity for trapping cold molecules, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 48, ISSN: 0953-4075
Hendricks RJ, Holland DA, Truppe S, et al., 2014, Vibrational branching ratios and hyperfine structure of <sup>11</sup>BH and its suitability for laser cooling, Frontiers of Physics, Vol: 2, Pages: 1-8, ISSN: 2095-0462
© 2014 Hendricks, Holland, Truppe, Sauer and Tarbutt. The simple structure of the BH molecule makes it an excellent candidate for direct laser cooling. We measure the branching ratios for the decay of the A 1 Π (v ′ = 0) state to vibrational levels of the ground state, X 1 Σ + , and find that they are exceedingly favorable for laser cooling. We verify that the branching ratio for the spin-forbidden transition to the intermediate a 3 Π state is inconsequentially small. We measure the frequency of the lowest rotational transition of the X state, and the hyperfine structure in the relevant levels of both the X and A states, and determine the nuclear electric quadrupole and magnetic dipole coupling constants. Our results show that, with a relatively simple laser cooling scheme, a Zeeman slower and magneto-optical trap can be used to cool, slow and trap BH molecules.
Truppe S, Hendricks RJ, Hinds EA, et al., 2014, MEASUREMENT OF THE LOWEST MILLIMETER-WAVE TRANSITION FREQUENCY OF THE CH RADICAL, ASTROPHYSICAL JOURNAL, Vol: 780, ISSN: 0004-637X
Truppe S, Hendricks RJ, Tokunaga SK, et al., 2014, Microwave spectroscopy of A-doublet transitions in the ground state of CH, JOURNAL OF MOLECULAR SPECTROSCOPY, Vol: 300, Pages: 70-78, ISSN: 0022-2852
Bulleid NE, Skoff SM, Hendricks RJ, et al., 2013, Characterization of a cryogenic beam source for atoms and molecules, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 15, Pages: 12299-12307, ISSN: 1463-9076
Truppe S, Hendricks RJ, Tokunaga SK, et al., 2013, A search for varying fundamental constants using hertz-level frequency measurements of cold CH molecules, NATURE COMMUNICATIONS, Vol: 4, ISSN: 2041-1723
Bulleid NE, Hendricks RJ, Hinds EA, et al., 2012, Traveling-wave deceleration of heavy polar molecules in low-field-seeking states, PHYSICAL REVIEW A, Vol: 86, ISSN: 1050-2947
Skoff SM, Hendricks RJ, Sinclair CDJ, et al., 2011, Diffusion, thermalization, and optical pumping of YbF molecules in a cold buffer-gas cell, PHYSICAL REVIEW A, Vol: 83, ISSN: 1050-2947
Zhuang X, Le A, Steimle TC, et al., 2011, Franck-Condon factors and radiative lifetime of the A(2)Pi(1/2)-X-2 Sigma(+) transition of ytterbium monofluoride, YbF, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 13, Pages: 19013-19017, ISSN: 1463-9076
Poschinger UG, Huber G, Ziesel F, et al., 2009, Coherent manipulation of a Ca-40(+) spin qubit in a micro ion trap, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 42, ISSN: 0953-4075
Skoff SM, Hendricks RJ, Sinclair CDJ, et al., 2009, Doppler-free laser spectroscopy of buffer-gas-cooled molecular radicals, NEW JOURNAL OF PHYSICS, Vol: 11, ISSN: 1367-2630
Champenois C, Hagel G, Knoop M, et al., 2008, Two photon Doppler cooling of atoms with an intermediate metastable state
Atomic clock performances are limited by the fluctuations of the local oscillator frequency. During an atomic clock operation, only a fraction of the cycle time is devoted to the excitation of the clock transition, limiting the sensitivity to these fluctuations and thus the ability to correct them. The rest of the time is needed to detect the probability of transition to the clock excited state or, for example, to cool the atoms to temperatures compatible with the required precision. A key issue to reach high clock stability is to reduce these dead times. We propose a laser excitation scheme that could shorten the laser cooling time and the detection time for some of the atomic species proposed as frequency standards in the optical domain like Ca+, Sr+, Ca, Sr and Yb.
Hendricks RJ, Phillips ES, Segal DM, et al., 2008, Laser cooling in the Penning trap: an analytical model for cooling rates in the presence of an axializing field, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 41, ISSN: 0953-4075
Hendricks RJ, Sorensen JL, Champenois C, et al., 2008, Doppler cooling of calcium ions using a dipole-forbidden transition, PHYSICAL REVIEW A, Vol: 77, ISSN: 1050-2947
Phillips ES, Hendricks RJ, Abdulla AM, et al., 2008, Dynamics of axialized laser-cooled ions in a Penning trap, PHYSICAL REVIEW A, Vol: 78, ISSN: 1050-2947
Hendricks RJ, Grant DM, Herskind PF, et al., 2007, An all-optical ion-loading technique for scalable microtrap architectures, APPLIED PHYSICS B-LASERS AND OPTICS, Vol: 88, Pages: 507-513, ISSN: 0946-2171
Hendricks RJ, Grant DM, Herskind PF, et al., 2007, An all-optical ion-loading technique for scalable microtrap architectures
Hendricks R, 2000, CERN opens antimatter factory, Physics World, Vol: 13, ISSN: 0953-8585
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