Tracing X-ray-induced formation of warm dense gold with Boltzmann kinetic equations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F21%3A00546984" target="_blank" >RIV/61389021:_____/21:00546984 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/21:00545288

Výsledek na webu

<a href="https://link.springer.com/article/10.1140%2Fepjd%2Fs10053-021-00235-z" target="_blank" >https://link.springer.com/article/10.1140%2Fepjd%2Fs10053-021-00235-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjd/s10053-021-00235-z" target="_blank" >10.1140/epjd/s10053-021-00235-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tracing X-ray-induced formation of warm dense gold with Boltzmann kinetic equations

Popis výsledku v původním jazyce

Abstract: In this paper, we report on the Boltzmann kinetic equation approach adapted for simulations of warm dense matter created by irradiation of bulk gold with intense ultrashort X-ray pulses. X-rays can excite inner-shell electrons, which triggers creation of deep-lying core holes. Their relaxation, especially in heavier elements such as gold (atomic number Z= 79) takes complicated pathways, involving collisional processes, and leading through a large number of active configurations. This number can be so high that solving a set of evolution equations for each configuration becomes computationally inefficient, and another modeling approach should be used instead. Here, we use the earlier introduced ’predominant excitation and relaxation path’ approach. It still uses true atomic configurations but limits their number by restricting material relaxation to a selected set of predominant pathways for material excitation and relaxation. With that, we obtain time-resolved predictions for excitation and relaxation in X-ray irradiated bulk of gold, including the respective change of gold optical properties. We compare the predictions with the available data from high-energy-density experiments. Their good agreement indicates ability of the Boltzmann kinetic equation approach to describe warm dense matter created from high-Z materials after their irradiation with X rays, which can be validated in future experiments. Graphic Abstract: [Figure not available: see fulltext.]

Název v anglickém jazyce

Tracing X-ray-induced formation of warm dense gold with Boltzmann kinetic equations

Popis výsledku anglicky

Abstract: In this paper, we report on the Boltzmann kinetic equation approach adapted for simulations of warm dense matter created by irradiation of bulk gold with intense ultrashort X-ray pulses. X-rays can excite inner-shell electrons, which triggers creation of deep-lying core holes. Their relaxation, especially in heavier elements such as gold (atomic number Z= 79) takes complicated pathways, involving collisional processes, and leading through a large number of active configurations. This number can be so high that solving a set of evolution equations for each configuration becomes computationally inefficient, and another modeling approach should be used instead. Here, we use the earlier introduced ’predominant excitation and relaxation path’ approach. It still uses true atomic configurations but limits their number by restricting material relaxation to a selected set of predominant pathways for material excitation and relaxation. With that, we obtain time-resolved predictions for excitation and relaxation in X-ray irradiated bulk of gold, including the respective change of gold optical properties. We compare the predictions with the available data from high-energy-density experiments. Their good agreement indicates ability of the Boltzmann kinetic equation approach to describe warm dense matter created from high-Z materials after their irradiation with X rays, which can be validated in future experiments. Graphic Abstract: [Figure not available: see fulltext.]

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal D

ISSN

1434-6060

e-ISSN

1434-6079

Svazek periodika

75

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

224

Kód UT WoS článku

000686660000001

EID výsledku v databázi Scopus

2-s2.0-85112527460