Laboratory Simulation of the Positron-Dust Interaction and its Implication for Interstellar Dark Clouds

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00573218" target="_blank" >RIV/61389021:_____/23:00573218 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/23:00567741 RIV/00216208:11320/23:10469102 RIV/68407700:21460/23:00363276 RIV/68407700:21670/23:00363276

Result on the web

<a href="https://iopscience.iop.org/article/10.3847/1538-4357/aca01c" target="_blank" >https://iopscience.iop.org/article/10.3847/1538-4357/aca01c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/aca01c" target="_blank" >10.3847/1538-4357/aca01c</a>

Result language

angličtina

Original language name

Laboratory Simulation of the Positron-Dust Interaction and its Implication for Interstellar Dark Clouds

Original language description

We report the first laboratory experiment dealing with the interaction of a cosmic dust simulant with positrons emitted from a 22Na radioisotope. Measurements of a charge of micrometer SiO2 dust grains with an accuracy of one elementary charge e revealed +1 e steps due to positron annihilation inside the grain. The observed average rate of these charging events agrees well with prediction of a model based on the continuous slowing down approximation of energetic of positrons inside the grain. Less frequent charge steps larger than +1 e were attributed to emission of secondary electrons during positron slowing down. The determined coefficient of secondary electron emission is approximately inversely proportional to the grain radius. The experimental results led us to the formulation of a possible scenario of interstellar dark clouds charging.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

942

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

42

UT code for WoS article

000908109100001

EID of the result in the Scopus database

2-s2.0-85146166671