### Abstract

The magnetic tuning of the low rotational levels in the X̃2Σ^{+} (0,0,0), Ã2Π_{r} (0,0,0), and B̃2Σ^{+} (0,0,0) electronic states of strontium hydroxide, SrOH, have been experimentally investigated using high resolution optical field-free and Zeeman spectroscopy of a cold molecular beam sample. The observed Zeeman shifts and splittings are successfully modeled using a traditional effective Hamiltonian approach to account for the interaction between the Ã2Π_{r} and B̃2Σ^{+} states. The determined magnetic g-factors for the X̃2Σ^{+}, Ã2Π_{r}, and B̃2Σ^{+} states are compared to those predicted by perturbation theory. The dispersed fluorescence resulting from laser excitation of rotationally resolved branch features of the 0_{0} ^{0} B̃2Σ^{+}←X̃2Σ^{+}, 0_{0} ^{0} Ã2Π_{3/2}←X̃2Σ^{+} and 0_{0} ^{0} Ã2Π_{1/2}←X̃2Σ^{+} transitions have been recorded and analyzed. The measured fluorescence branching ratios are compared with Franck-Condon calculations. The required bending motion wave functions are derived using a discrete variable representation (DVR) method. Implications for laser slowing and magneto-optical trapping experiments for SrOH are described.

Original language | English (US) |
---|---|

Pages (from-to) | 7-18 |

Number of pages | 12 |

Journal | Journal of Molecular Spectroscopy |

Volume | 347 |

DOIs | |

State | Published - May 1 2018 |

### Fingerprint

### Keywords

- Branching ratios
- Franck-Condon factors
- Strontium hydroxide

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics
- Spectroscopy
- Physical and Theoretical Chemistry

### Cite this

*Journal of Molecular Spectroscopy*,

*347*, 7-18. https://doi.org/10.1016/j.jms.2018.02.007

**Fluorescence branching ratios and magnetic tuning of the visible spectrum of SrOH.** / Nguyen, Duc Trung; Steimle, Timothy; Kozyryev, Ivan; Huang, Meng; McCoy, Anne B.

Research output: Contribution to journal › Article

*Journal of Molecular Spectroscopy*, vol. 347, pp. 7-18. https://doi.org/10.1016/j.jms.2018.02.007

}

TY - JOUR

T1 - Fluorescence branching ratios and magnetic tuning of the visible spectrum of SrOH

AU - Nguyen, Duc Trung

AU - Steimle, Timothy

AU - Kozyryev, Ivan

AU - Huang, Meng

AU - McCoy, Anne B.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - The magnetic tuning of the low rotational levels in the X̃2Σ+ (0,0,0), Ã2Πr (0,0,0), and B̃2Σ+ (0,0,0) electronic states of strontium hydroxide, SrOH, have been experimentally investigated using high resolution optical field-free and Zeeman spectroscopy of a cold molecular beam sample. The observed Zeeman shifts and splittings are successfully modeled using a traditional effective Hamiltonian approach to account for the interaction between the Ã2Πr and B̃2Σ+ states. The determined magnetic g-factors for the X̃2Σ+, Ã2Πr, and B̃2Σ+ states are compared to those predicted by perturbation theory. The dispersed fluorescence resulting from laser excitation of rotationally resolved branch features of the 00 0 B̃2Σ+←X̃2Σ+, 00 0 Ã2Π3/2←X̃2Σ+ and 00 0 Ã2Π1/2←X̃2Σ+ transitions have been recorded and analyzed. The measured fluorescence branching ratios are compared with Franck-Condon calculations. The required bending motion wave functions are derived using a discrete variable representation (DVR) method. Implications for laser slowing and magneto-optical trapping experiments for SrOH are described.

AB - The magnetic tuning of the low rotational levels in the X̃2Σ+ (0,0,0), Ã2Πr (0,0,0), and B̃2Σ+ (0,0,0) electronic states of strontium hydroxide, SrOH, have been experimentally investigated using high resolution optical field-free and Zeeman spectroscopy of a cold molecular beam sample. The observed Zeeman shifts and splittings are successfully modeled using a traditional effective Hamiltonian approach to account for the interaction between the Ã2Πr and B̃2Σ+ states. The determined magnetic g-factors for the X̃2Σ+, Ã2Πr, and B̃2Σ+ states are compared to those predicted by perturbation theory. The dispersed fluorescence resulting from laser excitation of rotationally resolved branch features of the 00 0 B̃2Σ+←X̃2Σ+, 00 0 Ã2Π3/2←X̃2Σ+ and 00 0 Ã2Π1/2←X̃2Σ+ transitions have been recorded and analyzed. The measured fluorescence branching ratios are compared with Franck-Condon calculations. The required bending motion wave functions are derived using a discrete variable representation (DVR) method. Implications for laser slowing and magneto-optical trapping experiments for SrOH are described.

KW - Branching ratios

KW - Franck-Condon factors

KW - Strontium hydroxide

UR - http://www.scopus.com/inward/record.url?scp=85043602520&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85043602520&partnerID=8YFLogxK

U2 - 10.1016/j.jms.2018.02.007

DO - 10.1016/j.jms.2018.02.007

M3 - Article

AN - SCOPUS:85043602520

VL - 347

SP - 7

EP - 18

JO - Journal of Molecular Spectroscopy

JF - Journal of Molecular Spectroscopy

SN - 0022-2852

ER -