{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T11:25:26Z","timestamp":1753874726836,"version":"3.41.2"},"reference-count":27,"publisher":"AIP Publishing","issue":"22","funder":[{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2022YFA1602504"],"award-info":[{"award-number":["2022YFA1602504"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["12027809","12374239"],"award-info":[{"award-number":["12027809","12374239"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100018554","name":"Science and Technology Program of Gansu Province","doi-asserted-by":"publisher","award":["25JRRA195"],"award-info":[{"award-number":["25JRRA195"]}],"id":[{"id":"10.13039\/501100018554","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Foundation for Innovative Research Group Project of Gansu Province","award":["25JRRA805"],"award-info":[{"award-number":["25JRRA805"]}]},{"name":"Young Scholars Science Foundation of Lanzhou Jiaotong University","award":["2024029"],"award-info":[{"award-number":["2024029"]}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,6,14]]},"abstract":"<jats:p>We report laser-induced fluorescence excitation and single-vibronic-level emission spectroscopic studies on gas-phase rhenium monoxide, complemented by high-level ab\u00a0initio calculations for the \u039b\u2013S and \u03a9 electronic states below 30\u2009000\u00a0cm\u22121. Altogether, 14 rotationally resolved vibronic bands were observed in excitation spectra within the energy range of 13\u2009850\u201323\u2009650\u00a0cm\u22121, and vibrationally resolved emission spectra revealed two \u03a9 components of the ground X2\u2206 state and three \u03a9 components of the a4\u03a0 state below 6500\u00a0cm\u22121. Rovibronic analysis of the spectra yielded electronic symmetries and key molecular constants, including the rotational constant, vibrational frequency, and spin\u2013orbit splitting. In addition, time-resolved emission spectroscopy further identified two cascading decay processes, [17.5]5\/2\u2013[17.4*]3\/2\u2013X 5\/2 and [20.2]5\/2\u2013[20.0]5\/2\u2013X 5\/2. Notably, ten excited states with \u03a9 = 5\/2 were characterized in the energy range of 17\u2009000\u201325\u2009000\u00a0cm\u22121, providing a benchmark for quantum chemical calculations of the 5d-atom-containing molecules, which typically exhibit strong relativistic spin\u2013orbit interactions and electron\u2013electron correlations.<\/jats:p>","DOI":"10.1063\/5.0272794","type":"journal-article","created":{"date-parts":[[2025,6,9]],"date-time":"2025-06-09T11:04:26Z","timestamp":1749467066000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["Newly observed electronic transitions in rhenium monoxide (ReO)"],"prefix":"10.1063","volume":"162","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-7484-9697","authenticated-orcid":false,"given":"Lei","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Mathematics and Physics, Lanzhou Jiaotong University 1 , Lanzhou 730070,","place":["China"]},{"name":"Gansu Center for Fundamental Research in Complex Systems Analysis and Control, Lanzhou Jiaotong University 2 , Lanzhou 730070,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-9820-2476","authenticated-orcid":false,"given":"Chaofan","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Modern Physics, Northwest University 3 , Xi\u2019an 710127,","place":["China"]},{"name":"Shaanxi Key Laboratory for Theoretical Physics Frontiers 4 , Xi\u2019an 710127,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0747-2428","authenticated-orcid":false,"given":"Wenli","family":"Zou","sequence":"additional","affiliation":[{"name":"Institute of Modern Physics, Northwest University 3 , Xi\u2019an 710127,","place":["China"]},{"name":"Shaanxi Key Laboratory for Theoretical Physics Frontiers 4 , Xi\u2019an 710127,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-8305-8876","authenticated-orcid":false,"given":"Jianhuang","family":"Lv","sequence":"additional","affiliation":[{"name":"Institute of Modern Physics, Chinese Academy of Sciences 5 , Lanzhou 730000,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xianhong","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Modern Physics, Chinese Academy of Sciences 5 , Lanzhou 730000,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9221-6228","authenticated-orcid":false,"given":"Jie","family":"Yang","sequence":"additional","affiliation":[{"name":"Institute of Modern Physics, Chinese Academy of Sciences 5 , Lanzhou 730000,","place":["China"]},{"name":"Heavy Ion Science and Technology Key Laboratory, Institute of Modern Physics, Chinese Academy of Sciences 6 , Lanzhou 73000,","place":["China"]},{"name":"Advanced Energy Science and Technology Guangdong Laboratory 7 , Huizhou 516003,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2025,6,9]]},"reference":[{"key":"2025060907042353200_c1","doi-asserted-by":"publisher","first-page":"119","DOI":"10.1021\/acs.accounts.8b00526","volume":"52","year":"2019","journal-title":"Acc. 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