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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.15284 |
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| _version_ | 1866911451867774976 |
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| author | Sant'Anna, Marcelo M. Martínes-Calderón, Aldo A. Jalbert, Ginette Rocha, A. B. Hinojosa, Guillermo |
| author_facet | Sant'Anna, Marcelo M. Martínes-Calderón, Aldo A. Jalbert, Ginette Rocha, A. B. Hinojosa, Guillermo |
| contents | The existence of an auto-detaching state of O$^-$ with a lifetime on the scale of a hundred nanoseconds is demonstrated both experimentally and theoretically. The O$^-$ lifetime values are determined using two recently developed methods. The experimental approach is based on a derivation from measured electron-loss cross sections combined with time-of-flight spectrometry. For the theoretical approach, the continued Green's function within the formalism of Fano-Feshbach is applied. We present the measured lifetime value of $100 \pm 10 \text{ ns}$. The calculated lifetime value is 75 ns, and is associated with the (2p$^3$3s$^2$)$^4$S state of O$^-$. We discuss how the existence of a 100-ns-lifetime oxygen metastable anion can impact the modeling of oxygen-containing systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_15284 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Highly correlated electronic bounding and spin effect: confirmation of an autodetaching state of O$^-$ Sant'Anna, Marcelo M. Martínes-Calderón, Aldo A. Jalbert, Ginette Rocha, A. B. Hinojosa, Guillermo Atomic Physics The existence of an auto-detaching state of O$^-$ with a lifetime on the scale of a hundred nanoseconds is demonstrated both experimentally and theoretically. The O$^-$ lifetime values are determined using two recently developed methods. The experimental approach is based on a derivation from measured electron-loss cross sections combined with time-of-flight spectrometry. For the theoretical approach, the continued Green's function within the formalism of Fano-Feshbach is applied. We present the measured lifetime value of $100 \pm 10 \text{ ns}$. The calculated lifetime value is 75 ns, and is associated with the (2p$^3$3s$^2$)$^4$S state of O$^-$. We discuss how the existence of a 100-ns-lifetime oxygen metastable anion can impact the modeling of oxygen-containing systems. |
| title | Highly correlated electronic bounding and spin effect: confirmation of an autodetaching state of O$^-$ |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2602.15284 |