Hi Gavin,
maybe you have solved your problem yet.
\startformula
{\null}^^{194}__{38}{\rm Sr}
or {\hbox{Xe}}^^{140}__{54}.
\stopformula
Better, ConTeXt way could be the variation on \chem:
\unexpanded\def\isotope#1#2#3{\dontleavehmode\begingroup\null\lohi[left]{#2}{#3}#1\endgroup}
\isotope{Sr}{38}{194}
or (with more logical order of parameters)
\unexpanded\def\isotope#1#2#3{\dontleavehmode\begingroup\null\lohi[left]{#1}{#2}#3\endgroup}
\isotope{38}{999}{Sr}
Or for text and math modes together:
\unexpanded\def\isotope#1#2#3{%
\ifmmode\begingroup\null^^{#1}__{#2}{\rm#3}\endgroup%
\else\dontleavehmode\begingroup\null\lohi[left]{\tfx
#1}{\tfx#2}\rm#3\endgroup%
\fi}
\isotope{999}{38}{Sr}
\startformula
\isotope{999}{38}{Sr}
\stopformula
You can do it either way, whichever way suits you better.
Tomáš
________________________________
Od: ntg-context <ntg-context-boun...@ntg.nl> za uživatele Hans Åberg via
ntg-context <ntg-context@ntg.nl>
Odesláno: sobota 15. dubna 2023 22:41
Komu: mailing list for ConTeXt users <ntg-context@ntg.nl>
Kopie: Hans Åberg <haber...@telia.com>
Předmět: Re: [NTG-context] Nuclear reactions
> On 15 Apr 2023, at 19:19, Gavin via ntg-context <ntg-context@ntg.nl> wrote:
>
> I’m writing nuclear reactions. When add prescripts to atomic symbols with two
> letters, (Be, Sr, Xe, etc.) the prescripts split the atoms!
One can use Unicode superscript and subscript numbers, as in ²³⁵₉₂U, which is
easier to read. For input, an editor supporting text substitutions might be
used.
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