Electronic Spectroscopy of YbNH2 and the Potential for Laser Cooling

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-03-25 DOI:10.1021/acs.jpclett.5c00400

Sophia Vadachkoria, Qingqing Lei, Timothy C. Steimle, Michael C. Heaven

{"title":"Electronic Spectroscopy of YbNH2 and the Potential for Laser Cooling","authors":"Sophia Vadachkoria, Qingqing Lei, Timothy C. Steimle, Michael C. Heaven","doi":"10.1021/acs.jpclett.5c00400","DOIUrl":null,"url":null,"abstract":"YbNH2 has been recognized as a suitable platform for observations of parity and time-reversal symmetry violations. Gas phase electronic spectra for YbNH2 were obtained for the Ã2B2-X̃2A1 and B̃2B1-X̃2A1 band systems. Both upper states are derived from the Yb+(4f146s)NH2– → Yb+(4f146p)NH2– electron promotion. Laser excitation and dispersed fluorescence measurements yielded band origins, vibrational constants and rotational band contours. Data for the Ã-X̃ system show a Franck–Condon distribution that is favorable for laser cooling. An upper bound for the vibrational branching fraction for the 000 transition in emission was found to be 0.94, assuming negligible radiation to the low-energy Yb+(4f136s2)NH2– states. Quantum chemical calculations for the Ã–X̃ vibronic bands are reported.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":"71 1","pages":""},"PeriodicalIF":4.8000,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Journal of Physical Chemistry Letters","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1021/acs.jpclett.5c00400","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

YbNH₂ has been recognized as a suitable platform for observations of parity and time-reversal symmetry violations. Gas phase electronic spectra for YbNH₂ were obtained for the Ã²B₂-X̃²A₁ and B̃²B₁-X̃²A₁ band systems. Both upper states are derived from the Yb⁺(4f¹⁴6s)NH₂^– → Yb⁺(4f¹⁴6p)NH₂^– electron promotion. Laser excitation and dispersed fluorescence measurements yielded band origins, vibrational constants and rotational band contours. Data for the Ã-X̃ system show a Franck–Condon distribution that is favorable for laser cooling. An upper bound for the vibrational branching fraction for the 0₀⁰ transition in emission was found to be 0.94, assuming negligible radiation to the low-energy Yb⁺(4f¹³6s²)NH₂^– states. Quantum chemical calculations for the Ã–X̃ vibronic bands are reported.

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.