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\documentclass[11pt]{article}

\usepackage{hrms}  %% Page settings, style ... for the HRMS abstract book.

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\title{ELECTRONIC SPECTROSCOPY OF VH AND VD: NEW BANDS IN THE RED REGION}

%% Note that \author and \address macros must be paired.
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\author{\underline{\FirstName THOMAS D. \LastName VARBERG}, \FirstName NATHAN T. \LastName BRANDES, \FirstName NICK J. \LastName IHRKE and \FirstName KEVIN A. \LastName TOVAR}

\address{Department of Chemistry, Macalester College, 1600 Grand Ave., St. Paul, MN, USA}

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%% Place below other \usepackage{ ... }, if you need other packages.
%% See http://www.tug.org/texlive/doc.html for a description of available packages.

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\usepackage{fancyhdr}
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\fancyhead[C]{{\footnotesize \textit{HRMS, 28th Colloquium, Dijon, France,
  Aug. 28 - Sept. 1, 2023}}}
\fancyfoot[C]{}
\renewcommand{\headrulewidth}{0.6pt}
\renewcommand{\footrulewidth}{0.6pt}

%% The hyperref package allows to include hyperlinks in a document.
%% See the instructions for abstract submission for more details.
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\usepackage[colorlinks=true,urlcolor=blue,linkcolor=blue,citecolor=blue]{hyperref}
\voffset -.65 cm

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\category {2,7}
\begin{document}

\maketitle  %% This will also build the list of author(s) and addresse(s).

%% Index macro(s): see the abstract samples and the instructions
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%% Place the body of your abstract below.

The first gas-phase spectrum of VH, assigned as the D$^5\Pi$--X$^5\Delta$ transition at 654 nm, was recently recorded and analyzed in our laboratory.\footnote{\href{https://doi.org/10.1063/5.0105844}{doi:10.1063/5.0105844}, T. D. Varberg, \textit{J. Chem. Phys.}, \textbf{157}, 074311 (2022).} We have now identified additional bands of VH (at 715 nm) and VD (at 715 and 770 nm), for which rotational analyses are currently being undertaken. At this stage, the 715-nm band of VH has been assigned as arising from the C$^{\prime}$$^5\Delta$--X$^5\Delta$ transition. All three bands are red-degraded and display complex rotational structures owing to the molecule's high spin multiplicity, rapid spin-uncoupling, large upper state $\Lambda$-doubling, and presence of strong local perturbations. We are also recording dispersed fluorescence spectra for many of the excitation transitions, which are a valuable aid for assigning the 15 rotational branches of the main sub-bands of these quintet systems. In each case fluorescence is observed to the v = 1 level of the X$^5\Delta$ state, enabling us to determine the $\Delta$\textit{G}$_{1/2}$ vibrational intervals of the electronic ground states of VH and VD. The molecules were produced by sputtering vanadium in a hollow cathode source with a dilute mixture of hydrogen or deuterium in argon. The spectra were recorded by laser excitation spectroscopy at Doppler-limited resolution using a continuous-wave ring dye laser. It is hoped that these results will be useful for astronomical searches for vanadium hydride in colder (L-type) stars within our galaxy.

\end{document}
