Fourier Transform Spectroscopy of the B<sup>2</sup>Σ-X<sup>2</sup>Σ Transition of BaH

Appelblad, O; Berg, Lars-Erik; Klynning, L.; Johns, J. W. C.

doi:10.1088/0031-8949/31/1/011

Cited by 32 publications

(32 citation statements)

References 9 publications

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“…The state-by-state fits of the line positions revealed anomalies [2,3]. For example, all the levels in the 2A state show considerable A-doubling; in v = 0 of A' 2A5/2 in BaH, AVef goes through a maximum at J = 14 89 and it proves to be impossible to fit the corresponding f-parity levels by the usual polynomials [2].…”

Section: Analysis and Resultsmentioning

confidence: 98%

The 5dcomplex of barium hydride; BaH and BaD

et al. 1987

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The metastable 2A states of BaH and BaD have been identified in laserinduced fluorescence and chemiluminescence spectra. Together with the known states A 2H and B 2E+, the 2A states form a group of interacting components, and the analysis is given of the v = 0 levels in terms of an effective hamiltonian for a d-complex. Deperturbed energies, rotational constants and values of the interaction constants are given.

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Section: Analysis and Resultsmentioning

confidence: 98%

The 5dcomplex of barium hydride; BaH and BaD

et al. 1987

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“…Equations (8,9) provide two independent experimental methods to estimate the vibrational branching ratio R 01 = q 01 (ω 01 /ω 00 ) 3 , and thus the vibronic FranckCondon factor q 01 , which is a prerequisite for direct laser cooling.…”

Section: B Frequency Dependent Absorption and Saturation Effectsmentioning

confidence: 99%

“…Figure 1 shows the electronic, rovibrational, and spin structure important for molecular laser cooling. Since 1932, studies have been performed on the BaH electronic ground state, X 2 Σ + , and seven excited electronic states [5][6][7][8][9][10]. The two lowest excited electronic states, A 2 Π and B 2 Σ + , lie in the near infrared spectral region, and both can be accessed by commercially available diode lasers.…”

Section: Introductionmentioning

confidence: 99%

“…To this end, we focus here on the B 2 Σ + state of BaH from the point of view of laser cooling. In previous studies, BaH was mainly produced in hydrogen-filled furnaces [8]. Here we present a simple approach to precise spectroscopy of BaH molecules, as well as many other diatomic species, that is directly applicable to buffer-gas cooled molecular beams [16,17] that are used for loading molecular magneto-optical traps (MOTs) [14,18].…”

Section: Introductionmentioning

confidence: 99%

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BaH molecular spectroscopy with relevance to laser cooling

2016

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We describe a simple experimental apparatus for laser ablation of barium monohydride (BaH) molecules and the study of their rovibrational spectra that are relevant to direct laser cooling. We present a detailed analysis of the properties of ablation plumes that can improve the understanding of surface ablation and deposition technologies. A range of absorption spectroscopy and collisional thermalization regimes has been studied. We directly measured the Franck-Condon factor of the B 2 Σ + (v = 0) ← X 2 Σ + (v = 1) transition. Prospects for production of a high luminosity cryogenic BaH beam are outlined. This molecule is a promising candidate for laser cooling and ultracold fragmentation, both of which are precursors to novel experiments in many-body physics and precision measurement.

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“…Subsequently Appelblad et al [15] [16] performed detailed analysis for the v = 0 levels and interpreted the H2A, A2II and B22 as members of a d-complex, correlated to the 5d atomic state of barium. This interpretation confirms the assignment suggested by Veseth [13].…”

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confidence: 99%