Re: [NTG-context] Nuclear reactions
On Sat, 15 Apr 2023 12:02:28 -0600
Gavin via ntg-context wrote:
> Hi List,
>
> I am still interested in knowing if there is a good way to do nuclear
> reactions using \chemical.
>From the chemical manual:
As in mathematical typesetting mode, subscripts and superscripts can
precede text. Thus, isotopes (such as this alpha particle, for
example), can be written as: \chemical{^4_2He^{2+}}. But compare the
alignment of \chemical{_{92}^{238}U} with
\chemical{\lohi[left]{92}{238}U}.
I have not used chemical formulas for some time, but
\chemical{^{235)_{92}U,+,$n$,->,^{94}_{38}Sr,+,^{140}_{54}Xe,+,$2n$}
"->" and "GIVES" are synonyms, as are "+" and "PLUS"
(also MINUS, SINGLE, DOUBLE, TRIPLE, EQUILIBRIUM, MESOMERIC with ascii
and unicode synonyms).
Alignment can be altered using \lohi[left]{92}{235}
(remember left is flushright)
There is also "display mode" for chemical formulae:
\startchemicalformula
\chemical{text}
\chemical{text}{below}
\chemical{text}{above}{below}
\stopchemicalformula
where above and below can be used for labels, etc.
Alan
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Re: [NTG-context] Nuclear reactions
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 za uživatele Hans Åberg via
ntg-context
Odesláno: sobota 15. dubna 2023 22:41
Komu: mailing list for ConTeXt users
Kopie: Hans Åberg
Předmět: Re: [NTG-context] Nuclear reactions
> On 15 Apr 2023, at 19:19, Gavin via ntg-context 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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Re: [NTG-context] Nuclear reactions
> On 15 Apr 2023, at 19:19, Gavin via ntg-context 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. ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___
Re: [NTG-context] Nuclear reactions
Hi List,
I am still interested in knowing if there is a good way to do nuclear reactions
using \chemical. But I found something that works for my current needs:
\define[1]\Sr{\mathord{\rm Sr}__{38}^^{#1}}
\define[1]\Xe{\mathord{\rm Xe}__{54}^^{#1}}
\define[1]\U{\mathord{\rm U}__{92}^^{#1}}
\starttext
Reaction:
\startformula
\U{235} + n \rightarrow \Sr{94} + \Xe{140} + 2n
\stopformula
\stoptext
Since I will be writing many reactions with a dozen or so different atomic
symbols, it makes sense to create a command for each atomic symbol that adds
the correct atomic number and takes the mass number as an argument.
Hope someone else can benefit. I still getting used to ConTeXt's treatment of
{…}, which does not appear to be TeX's way.
Gavin
> On Apr 15, 2023, at 11:19 AM, Gavin wrote:
>
> Hi list,
>
> I’m writing nuclear reactions. When add prescripts to atomic symbols with two
> letters, (Be, Sr, Xe, etc.) the prescripts split the atoms! (See output
> below.)
>
> \starttext
> Text: \lohi[left]{4}{10}Be.
> Reaction:
> \startformula
> {\rm U}^^{235}__{92} + n \rightarrow {\rm Sr}^^{94}__{38} + {\rm
> Xe}^^{140}__{54} + 2n
> \stopformula
> \stoptext
>
> I looked at \chemical and \molecule, but could not find a way to make
> isotopes with those. Any ideas?
>
> Gavin
>
>
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