On the empirical determination of positron trapping coefficient at nano-scale helium bubbles in steels irradiated in spallation target

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10387849" target="_blank" >RIV/00216208:11320/18:10387849 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jnucmat.2018.03.045" target="_blank" >https://doi.org/10.1016/j.jnucmat.2018.03.045</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnucmat.2018.03.045" target="_blank" >10.1016/j.jnucmat.2018.03.045</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the empirical determination of positron trapping coefficient at nano-scale helium bubbles in steels irradiated in spallation target

Popis výsledku v původním jazyce

In the present work, the specific positron trapping rate of small helium bubbles was empirically derived from positron annihilation lifetime spectroscopy (PALS) and transmission electron microscopy (TEM) studies of Fe9Cr martensitic steels. Both techniques are well known to be sensitive to nanometer-sized helium-filled cavities induced during irradiation in a mixed proton-neutron spectrum of spallation target. Complementary TEM and PALS studies show that positrons are being trapped to these defects at a rate of 1.2 +/- 0.8 x 10(-14) m(3) s(-1). This suggests that helium bubbles in ferritic/martensitic steels are attractive traps for positrons comparable to mono-vacancies and quantitative analysis of the bubbles by PALS technique is plausible.

Název v anglickém jazyce

On the empirical determination of positron trapping coefficient at nano-scale helium bubbles in steels irradiated in spallation target

Popis výsledku anglicky

In the present work, the specific positron trapping rate of small helium bubbles was empirically derived from positron annihilation lifetime spectroscopy (PALS) and transmission electron microscopy (TEM) studies of Fe9Cr martensitic steels. Both techniques are well known to be sensitive to nanometer-sized helium-filled cavities induced during irradiation in a mixed proton-neutron spectrum of spallation target. Complementary TEM and PALS studies show that positrons are being trapped to these defects at a rate of 1.2 +/- 0.8 x 10(-14) m(3) s(-1). This suggests that helium bubbles in ferritic/martensitic steels are attractive traps for positrons comparable to mono-vacancies and quantitative analysis of the bubbles by PALS technique is plausible.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

—

Svazek periodika

504

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

277-280

Kód UT WoS článku

000430050900032

EID výsledku v databázi Scopus

2-s2.0-85044961698