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Added a "symmetric top" rotor#1899

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alongd wants to merge 10 commits intomainfrom
symmetric_top
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Added a "symmetric top" rotor#1899
alongd wants to merge 10 commits intomainfrom
symmetric_top

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@alongd
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@alongd alongd commented Feb 25, 2020

Motivation or Problem

So far Arkane treated species as either linear or non-linear ("asymmetric top"). Although RMG's statmech had functionality to treat "spherical top" rotors, it wasn't used when parsing ESS output files (it is used only if a user explicitly specifies it in the input file).

Description of Changes

First a "spherical top" rotor was added. Here we also make Arkane identify the correct rotor using the parsed or computed rotational constants.

Nomenclature:

  • Spherical Top rotor: A species with all three rotational constants equal (e.g., CH4).
  • Symmetric Top rotor: A species with only two of the three rotational constants equal (e.g., NH3).
  • Asymmetric Top rotor: A (non linear) species with three unique rotational constants. In RMG this is called a NonlinearRotor, we might want to consider renaming it to AsymmetricRotor (not renamed in this PR).

@JacksonBurns
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This PR is abandoned but up-to-date and simple enough that it could be merged. I am going to change the base branch to main, update it, and see what happens.

@JacksonBurns JacksonBurns changed the base branch from master to main May 16, 2023 18:59
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@alongd the tests failed above are from (1) attempts to use parts of the API which have since been removed and (2) errors in values related to the hindered rotors, which are presumably actually not failures since the new values should be more accurate.

If you have time, I think this would be great to get merged!

@JacksonBurns JacksonBurns mentioned this pull request Jul 25, 2023
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This pull request is being automatically marked as stale because it has not received any interaction in the last 90 days. Please leave a comment if this is still a relevant pull request, otherwise it will automatically be closed in 30 days.

@github-actions github-actions bot added the stale stale issue/PR as determined by actions bot label Oct 23, 2023
@github-actions github-actions bot added the abandoned abandoned issue/PR as determined by actions bot label Nov 22, 2023
@github-actions github-actions bot closed this Nov 22, 2023
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