کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1483314 | 1510534 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High frequency collective dynamics in liquid potassium
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
We investigated by inelastic X-ray scattering the dynamical properties of molten potassium in a wide range of momentum transfer, Q, from 1 nmâ1 up to the main peak of the structure factor Q â 17 nmâ1. The observed increase of sound velocity in the low Q region (1 < Q < 3 nmâ1), has been described within a model characterized by two distinct relaxation processes for the collective dynamics. The obtained results are discussed and compared with those from previous neutron scattering experiments. In particular, we associate the speed-up of the sound velocity to the 'instantaneous' disorder of the liquid as opposed to the argument, supported by some neutron scattering studies, of a transition from a liquid to solid like response of the system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 353, Issues 32â40, 15 October 2007, Pages 3154-3159
Journal: Journal of Non-Crystalline Solids - Volume 353, Issues 32â40, 15 October 2007, Pages 3154-3159
نویسندگان
A. Monaco, T. Scopigno, P. Benassi, A. Giugni, G. Monaco, M. Nardone, G. Ruocco, M. Sampoli,