Dear A. Ahad, In my opinion, by doing so you must be sure that your structural phase is isotropic in lattice expansion or regression. Truly yours, Duc-Chau Nguyen, Ph.D. Postdoctoral fellow, Institute of Physics, Academia Sinica -----Original message----- From:ABDUL AHAD To:ifeffit Date: Thu, 14 Jun 2018 17:02:37 Subject: [Ifeffit] Restrain Hi all, i have query regarding restrain. suppose i have single scattering path which is equal to lattice parameter. Now i also have multi-scattering path with Reff equal to the same single scattering path. Now my question is, Is it correct to constraint the all path of same reff to equal delt_r, Because i think in magnitude they must lie on same R but different in phase (different frequency component). thanks -- ​ A. Ahad -------------------- Abdul Ahad Junior Research Fellow Dept of Physics Aligarh Muslim University Aligarh 202002 (U.P.), India http://www.researcherid.com/rid/G-8198-2018 Email: abdulahad.phy@gmail.com _______________________________________________ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit