What does this research mean for the field?

The ground state of gas-phase UO 2 is confirmed to be X 3 Φ 2u , derived from the O 2- U 4+ (5f7s)O 2- electronic configuration. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

The aim is to analyze the electronic spectra and define the vibrational characteristics of gas-phase UO2.

February 24, 2026The Journal of Physical Chemistry LettersOpen Access

Rotationally Resolved Electronic Spectroscopy of UO ₂

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Authors

JHJiande HanEmory University JLJiayue LinEmory University MHMichael C. HeavenEmory University

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Implication

Rotational spectroscopy reveals electronic states and vibrational modes in gas-phase UO2, indicating complex interactions.

Key Points

The aim is to analyze the electronic spectra and define the vibrational characteristics of gas-phase UO2.
Recorded rotationally resolved electronic spectra for gas-phase UO2.
Analyzed the rotational fine structure to confirm ground state configurations.
Determined vibrational fundamentals and bond lengths from the spectral data.
Ground state confirmed as X3Φ2u derived from the O2-U4+(5f7s)O2- configuration.
Vibrational fundamentals found at 853(5) and 133(5) cm-1 with a bond length of 1.781 Å.
Fluorescence decay lifetimes ranged from 1.5-4.7 μs, attributed to vibronic mixing.

Cite This Study

Han et al. (2026) studied this question.

synapsesocial.com/papers/699d3f9ede8e28729cf6438d https://doi.org/10.1021/acs.jpclett.6c00279

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Rotationally Resolved Electronic Spectroscopy of UO ₂

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Key Points

Cite This Study

Rotationally Resolved Electronic Spectroscopy of UO ₂

Discussion

Member takes

Implication

Key Points

Cite This Study

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