Improved potentials and Born-Oppenheimer corrections by new measurements of transitions of 129I2 and 127I 129I  in the B3 $\Pi_{\rm O^+_u}$ - X1 $\Sigma^+_{\rm g}$ band system

Salumbides, E. J.; Eikema, K.S.E.; Ubachs, Wim; Hollenstein, U.; Knöckel, H.; Tiemann, E.

doi:10.1140/epjd/e2008-00045-y

Cited by 30 publications

(17 citation statements)

References 32 publications

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“…To this end, the dye laser output is directed to an existing setup for saturated absorption spectroscopy in an I 2 vapor cell [10]. As the I 2 spectrum has been well calibrated [11,12], it can also serve to independently determine the FSR of the FPI, and to assess the overall performance of our method.…”

Section: Frequency Calibrationmentioning

confidence: 99%

Widely tunable laser frequency offset lock with 30 GHz range and 5 THz offset

Biesheuvel¹,

Noom²,

Salumbides³

et al. 2013

Opt. Express

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Abstract:We demonstrate a simple and versatile method to greatly extend the tuning range of optical frequency shifting devices, such as acousto-optic modulators (AOMs). We use this method to stabilize the frequency of a tunable narrow-band continuous-wave (CW) laser to a transmission maximum of an external Fabry-Perot interferometer (FPI) with a tunable frequency offset. This is achieved through a servo loop which contains an in-loop AOM for simple radiofrequency (RF) tuning of the optical frequency over the full 30 GHz mode-hop-free tuning range of the CW laser. By stabilizing the length of the FPI to a stabilized helium-neon (HeNe) laser (at 5 THz offset from the tunable laser) we simultaneously transfer the ∼ 1 MHz absolute frequency stability of the HeNe laser to the entire 30 GHz range of the tunable laser. Thus, our method allows simple, wide-range, fast and reproducible optical frequency tuning and absolute optical frequency measurements through RF electronics, which is here demonstrated by repeatedly recording a 27-GHz-wide molecular iodine spectrum at scan rates up to 500 MHz/s. General technical aspects that determine the performance of the method are discussed in detail. 19235-19240 (2009). 3. S. Hisatake, T. Konishi, and T. Nagatsuma, "Multiplication of optical frequency shift by cascaded electro-optic traveling phase gratings operating above 10 GHz," Opt. Lett. 36, 1350Lett. 36, -1352Lett. 36, (2011. 4. D. Haubrich and R. Wynands, "A modified commercial Ti:sapphire laser with 4 kHz rms linewidth," Opt. Comm. 123, 558-562 (1996). 5. U. Schünemann, H. Engler, R. Grimm, M. Weidemüller, and M. Zielonkowski, "Simple scheme for tunable frequency offset locking of two lasers," Rev. Sci. Instrum. 70, 242-243, (1999

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Section: Frequency Calibrationmentioning

confidence: 99%

Widely tunable laser frequency offset lock with 30 GHz range and 5 THz offset

Biesheuvel¹,

Noom²,

Salumbides³

et al. 2013

Opt. Express

Self Cite

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“…They are also important for H + 3 [4], and they have been characterized spectroscopically for hydrides such as HeH + [5], BeH + [6], HF [7,8,9], HCl [10,9], HBr and HI [9], AgH [11,12], LiH [13], BeH [14] and MgH [15] and for CO [16], Li 2 [17,18,19], LiK [20], and LiRb [21]. For molecules without such light nuclei, the deviations have been hard to detect [22,23,24], although indications of them have been seen in K 2 [25], Rb 2 [22,26], and I 2 [27,28].…”

Section: Introductionmentioning

confidence: 99%

Deviations from Born-Oppenheimer mass scaling in spectroscopy and ultracold molecular physics

Lutz

Hutson

2016

Journal of Molecular Spectroscopy

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We investigate Born-Oppenheimer breakdown (BOB) effects (beyond the usual mass scaling) for the electronic ground states of a series of homonuclear and heteronuclear alkali-metal diatoms, together with the Sr 2 and Yb 2 diatomics. Several widely available electronic structure software packages are used to calculate the leading contributions to the total isotope shift for commonly occurring isotopologs of each species. Computed quantities include diagonal Born-Oppenheimer corrections (mass shifts) and isotopic field shifts. Mass shifts dominate for light nuclei up to and including K, but field shifts contribute significantly for Rb and Sr and are dominant for Yb. We compare the ab initio mass-shift functions for Li 2 , LiK and LiRb with spectroscopically derived ground-state BOB functions from the literature. We find good agreement in the values of the functions for LiK and LiRb at their equilibrium geometries, but significant disagreement with the shapes of the functions for all 3 systems. The differences may be due to contributions of nonadiabatic terms to the empirical BOB functions. We present a semiclassical model for the effect of BOB corrections on the binding energies of near-threshold states and the positions of zero-energy Feshbach resonances.

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“…In addition, the iodine frequencies can be predicted by the IodineSpec program [20] based on model descriptions of the hyperfine and rovibronic structures [21][22][23]. The iodine transition frequencies can be predicted to be better than 2 MHz in the interval from 19; 000 cm −1 (526 nm) to 15; 000 cm −1 (667 nm) by the IodineSpec program.…”

Section: Introductionmentioning

confidence: 99%

Precise frequency measurements of iodine hyperfine transitions at 671 nm

Huang

Chen

et al. 2013

Appl. Opt.

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We report absolute frequency measurements on the a(1), a(10), and a(15) hyperfine components of the R(78) 4-6 line of (127)I(2). An external-cavity diode laser system at 671 nm is frequency-stabilized to the saturated absorption center obtained by modulation transfer spectroscopy in an iodine vapor cell. Its absolute frequency is measured by an optical frequency comb. The effect of pressure shift is investigated to obtain the absolute transition frequency at zero pressure. Our determination of the line centers reaches a precision of better than 40 kHz and will provide useful input for theoretical calculations. This frequency-stabilized laser can be used as a reference laser for the spectroscopy of lithium D lines.

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Improved potentials and Born-Oppenheimer corrections by new measurements of transitions of 129I2 and 127I 129I in the B3 $\Pi_{\rm O^+_u}$ - X1 $\Sigma^+_{\rm g}$ band system

Cited by 30 publications

References 32 publications

Widely tunable laser frequency offset lock with 30 GHz range and 5 THz offset

Widely tunable laser frequency offset lock with 30 GHz range and 5 THz offset

Deviations from Born-Oppenheimer mass scaling in spectroscopy and ultracold molecular physics

Precise frequency measurements of iodine hyperfine transitions at 671 nm

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