Measurement of the Electric Dipole Moment of AlCl by Stark Level Spectroscopy
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908401683922944 |
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| author | Liu, Li-Ren Aguirre Jr., Miguel Kane, Stephen R. Kendrick, Brian K. Hemmerling, Boerge |
| author_facet | Liu, Li-Ren Aguirre Jr., Miguel Kane, Stephen R. Kendrick, Brian K. Hemmerling, Boerge |
| contents | We report the measurement of the electric dipole moment of aluminum monochloride (AlCl) using a cryogenic buffer-gas beam source. Using Stark shift spectroscopy, we derive values for the dipole moments in the body-fixed frame of the two lowest vibrational states for the $X^1Σ^+$ electronic state, $μ_X(v''=0) = -1.679$ D and $μ_X(v'' = 1) = -1.761$ D, and for the $A^1Π$ state, $μ_A(v' = 0) = -1.030$ D and $μ_A(v' = 1) = -1.052$ D. We also show that the ab initio calculations of the dipole moment and $T_e$ energy of AlCl are sensitive to the level of treatment of the spin-orbit orbit coupling. We further lay out the implications of these results for astrophysical models of stellar and planetary evolution that have used a substitute value for the dipole moment of AlCl until now. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13611 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Measurement of the Electric Dipole Moment of AlCl by Stark Level Spectroscopy Liu, Li-Ren Aguirre Jr., Miguel Kane, Stephen R. Kendrick, Brian K. Hemmerling, Boerge Atomic Physics Earth and Planetary Astrophysics Solar and Stellar Astrophysics We report the measurement of the electric dipole moment of aluminum monochloride (AlCl) using a cryogenic buffer-gas beam source. Using Stark shift spectroscopy, we derive values for the dipole moments in the body-fixed frame of the two lowest vibrational states for the $X^1Σ^+$ electronic state, $μ_X(v''=0) = -1.679$ D and $μ_X(v'' = 1) = -1.761$ D, and for the $A^1Π$ state, $μ_A(v' = 0) = -1.030$ D and $μ_A(v' = 1) = -1.052$ D. We also show that the ab initio calculations of the dipole moment and $T_e$ energy of AlCl are sensitive to the level of treatment of the spin-orbit orbit coupling. We further lay out the implications of these results for astrophysical models of stellar and planetary evolution that have used a substitute value for the dipole moment of AlCl until now. |
| title | Measurement of the Electric Dipole Moment of AlCl by Stark Level Spectroscopy |
| topic | Atomic Physics Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2503.13611 |