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%% Sample TeX file for the HRMS Dijon 2023 abstracts
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%% Lines (or parts of) beginning with at least one '%' are comments 
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%% Codings beginning with \ are LaTeX macros, or commands.
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\documentclass[11pt]{article}

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

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\title{EXTRAPOLATION PROPERTIES OF MORSE-LENARD JONES POTENTIAL}

%% Note that \author and \address macros must be paired.
%% The names of authors must also appear IN CAPITALS.
%% The name(s) of author(s) presenting the work is(are) usually underlined.

\author{\underline{\FirstName A. \LastName SINANAJ},
  \FirstName A. \LastName PASHOV}
\address{Sofia University St. Kliment Ohridski, Faculty of Physics, bul. J. Bourchier 5, 1164 Sofia, Bulgaria}

%% The \FirstName and \LastName macros are mandatory for each author
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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.

%% The macros below will change the page head and foot.
%% Please, do not modify the content of the \fancyhead macro nor the \fancyfoot line.
\usepackage{fancyhdr}
\pagestyle{fancy}
\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.
%% WARNING: Make sure that this package comes LAST since it re-defines many LaTeX macros.
\usepackage[colorlinks=true,urlcolor=blue,linkcolor=blue,citecolor=blue]{hyperref}
\voffset -.65 cm

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\category {2,1}
\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
%% Remove the %% to account for the index item(s)
%% \index{Item1}
%% \index{Item2}

%% Place the body of your abstract below.


The accuracy of the potential energy curves for diatomic molecules determined from experimental data is confirmed empirically with numerous examples in the literature. Usually PECs are determined from a limited set of experimental data and this in turns limits the range of internuclear distances where the shape of the potential is unambiguously fixed. While the uncertainty for interpolation could be assessed, the extrapolation is usually questionable and needs careful analyses. The Morse/Long-Range potential (Mol. Phys. 105, 663 (2007)) has been reported to have a built in long-range asymptotic behavior and therefore it is plausible to expect that one can expect good extrapolation properties and even possibility to determine important molecular parameters like $D_e$ or/and $C_6$ from limited set of experimental data. In this contribution we undertake a systematic study which confirms these expectations in the case of Ca$_2$ ground state. 
\end{document}
