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iFunc_Sqw2D: create 'LEAPR' models #147

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farhi opened this issue Nov 19, 2017 · 5 comments
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iFunc_Sqw2D: create 'LEAPR' models #147

farhi opened this issue Nov 19, 2017 · 5 comments
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farhi commented Nov 19, 2017

This depends on Sjolander multi phonon approx #125
@farhi farhi mentioned this issue Nov 19, 2017
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farhi commented Jul 10, 2018

And Schofield paper with Vineyard S(a,b)

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farhi commented Aug 17, 2018

also implement Egelstaff and Schofield in attached report from E. Guarini
same for Vineyard
See: https://github.com/McStasMcXtrace/iFit/files/1314132/CRISP.WP11.T2.-.technical.report.pdf

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farhi commented Sep 25, 2018

On going work. Not so easy for unit conversions...

sqw_egelstaff.m.txt

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farhi commented Oct 24, 2018

Few comments from an earlier LEAPR work port to matlab, and related doc.

198801001570.pdf
indc-nds-0470.pdf
LA-12639-LEAPR-MacFarlane-199426027423.pdf
leapr.m.txt
thermal.pdf

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farhi commented Nov 23, 2018

Can use models (see LA-12639-MS or 'thermal' report):

  • short collision time approx (SCT)
  • free gas
  • recoil

which are all similar in fact, with rescaling of axes.

@farhi farhi mentioned this issue Nov 27, 2018
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@farhi farhi closed this as completed in 76c7af5 Dec 19, 2018
farhi added a commit that referenced this issue Sep 25, 2019
@farhi
Models: add LEAPR models, Close #147.
92ea555
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