High-Resolution Analysis Using Bent Perfect Crystal in Powder Diffraction: Part II

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00539686" target="_blank" >RIV/61389005:_____/20:00539686 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1134/S1027451020070332" target="_blank" >https://doi.org/10.1134/S1027451020070332</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S1027451020070332" target="_blank" >10.1134/S1027451020070332</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-Resolution Analysis Using Bent Perfect Crystal in Powder Diffraction: Part II

Popis výsledku v původním jazyce

As a continuation of our recent studies of alpha-Fe(211) samples at a scattering angle of 2 theta(S)= 88 degrees (Part I), a three-axis setup using bent perfect crystal monochromator and several analyzers was tested in the diffraction study of polycrystalline alpha-Fe(110) pins with a diameter of 8 and 2 mm at a scattering angle of 2 theta(S)= 47.1 degrees. After realizing the focusing conditions in real and momentum space at a neutron wavelength of 0.162 nm, a high angular resolution was achieved up to FWHM(Delta d/d) = 1.4 x 10(-3)and FWHM(Delta d/d) = 2.5 x 10(-3)for alpha-Fe samples with a diameter of 2 and 8 mm, respectively. This resolution was obtained by using open beams, i.e., without Soller collimators within the used range of the curvatures of the analyzers. Such settings can be used in powder diffraction, namely, in studies of high-resolution residual stresses and/or analysis of diffraction profiles with a small difference in the lattice parameters or a small change due to the application of an external load.

Název v anglickém jazyce

High-Resolution Analysis Using Bent Perfect Crystal in Powder Diffraction: Part II

Popis výsledku anglicky

As a continuation of our recent studies of alpha-Fe(211) samples at a scattering angle of 2 theta(S)= 88 degrees (Part I), a three-axis setup using bent perfect crystal monochromator and several analyzers was tested in the diffraction study of polycrystalline alpha-Fe(110) pins with a diameter of 8 and 2 mm at a scattering angle of 2 theta(S)= 47.1 degrees. After realizing the focusing conditions in real and momentum space at a neutron wavelength of 0.162 nm, a high angular resolution was achieved up to FWHM(Delta d/d) = 1.4 x 10(-3)and FWHM(Delta d/d) = 2.5 x 10(-3)for alpha-Fe samples with a diameter of 2 and 8 mm, respectively. This resolution was obtained by using open beams, i.e., without Soller collimators within the used range of the curvatures of the analyzers. Such settings can be used in powder diffraction, namely, in studies of high-resolution residual stresses and/or analysis of diffraction profiles with a small difference in the lattice parameters or a small change due to the application of an external load.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Surface Investigation-X-Ray Synchrotron and Neutron Techniques

ISSN

1027-4510

e-ISSN

—

Svazek periodika

14

Číslo periodika v rámci svazku

SUPPL 1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

151-155

Kód UT WoS článku

000578828100031

EID výsledku v databázi Scopus

2-s2.0-85092365508