Impact of SiO2 Cross Sections on Asteroid Deflection

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000020" target="_blank" >RIV/26722445:_____/24:N0000020 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.ans.org/pubs/transactions/article-56911/" target="_blank" >https://www.ans.org/pubs/transactions/article-56911/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13182/T131-45706" target="_blank" >10.13182/T131-45706</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of SiO2 Cross Sections on Asteroid Deflection

Popis výsledku v původním jazyce

An asteroid impact is a devastating event that should be prevented at any cost. The most common kind of asteroid is a chondrite asteroid. They consist of clay and silicate rocks. Silicates are composed of silicon and oxygen atoms. They were formed over 4.54 billion years ago and therefore are among the most ancient objects in the solar system. The orbits of asteroids located in the asteroid belt can be changed by Jupiter's gravity, and in the worst case scenario could slam into Earth. When a collision between the Earth and an asteroid is imminent and the time to react is too short, there is a possibility of using nuclear weapons. They can deflect large asteroids or mitigate the impacts of smaller bodies. Nuclear data determines the end results of a nuclear explosion on asteroid deflection. More specifically, transport cross sections determine the neutron and gamma interactions with the asteroid body. The calculated energy deposition profiles and spatial distribution are coupled to hydrodynamic asteroid models to simulate deflections. The accuracy of cross sections is crucial to calculate energy deposition and distribution correctly. However, these profiles depend heavily on the used nuclear data library. The presented paper focuses on nuclear data validation of sand cross sections. The sand, containing silicon and oxygen atoms, has been chosen since the non-thermal cross sections do not depend on the chemical form. The chemical composition of the used sand was performed using the X-ray fluorescence method. The composition of sand is listed in Table 1. 252Cf(s.f.) neutron source was chosen as a neutron source because it is the only neutron standard. For that reason, it is a preferable neutron source for validation purposes. Moreover, its spectrum resembles the 235U prompt fission neutron spectrum developed in the atomic bomb explosion. The experimental work was divided into four parts. The first part deals with a fast neutron measurement of the sand leakage spectrum, measured by a stilbene scintillator. The second part discusses measurements with activation detectors inside the sand cylinder. The third part concerns with reaction rate measurements of 28Si(n,p)28Al and 29Si(n,p)29Al reactions. Finally, the fourth part deals with measurements of prompt gamma rays induced by neutron interactions in sand. All experimental results were compared with MCNP6.2 calculations using state-of-the-art nuclear data libraries, such as ENDF/B-VIII.0, JEFF-3.3, IRDFF-II, and INDEN.

Název v anglickém jazyce

Impact of SiO2 Cross Sections on Asteroid Deflection

Popis výsledku anglicky

An asteroid impact is a devastating event that should be prevented at any cost. The most common kind of asteroid is a chondrite asteroid. They consist of clay and silicate rocks. Silicates are composed of silicon and oxygen atoms. They were formed over 4.54 billion years ago and therefore are among the most ancient objects in the solar system. The orbits of asteroids located in the asteroid belt can be changed by Jupiter's gravity, and in the worst case scenario could slam into Earth. When a collision between the Earth and an asteroid is imminent and the time to react is too short, there is a possibility of using nuclear weapons. They can deflect large asteroids or mitigate the impacts of smaller bodies. Nuclear data determines the end results of a nuclear explosion on asteroid deflection. More specifically, transport cross sections determine the neutron and gamma interactions with the asteroid body. The calculated energy deposition profiles and spatial distribution are coupled to hydrodynamic asteroid models to simulate deflections. The accuracy of cross sections is crucial to calculate energy deposition and distribution correctly. However, these profiles depend heavily on the used nuclear data library. The presented paper focuses on nuclear data validation of sand cross sections. The sand, containing silicon and oxygen atoms, has been chosen since the non-thermal cross sections do not depend on the chemical form. The chemical composition of the used sand was performed using the X-ray fluorescence method. The composition of sand is listed in Table 1. 252Cf(s.f.) neutron source was chosen as a neutron source because it is the only neutron standard. For that reason, it is a preferable neutron source for validation purposes. Moreover, its spectrum resembles the 235U prompt fission neutron spectrum developed in the atomic bomb explosion. The experimental work was divided into four parts. The first part deals with a fast neutron measurement of the sand leakage spectrum, measured by a stilbene scintillator. The second part discusses measurements with activation detectors inside the sand cylinder. The third part concerns with reaction rate measurements of 28Si(n,p)28Al and 29Si(n,p)29Al reactions. Finally, the fourth part deals with measurements of prompt gamma rays induced by neutron interactions in sand. All experimental results were compared with MCNP6.2 calculations using state-of-the-art nuclear data libraries, such as ENDF/B-VIII.0, JEFF-3.3, IRDFF-II, and INDEN.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

—

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Transactions of the American Nuclear Society

ISSN

0003-018X

e-ISSN

—

Svazek periodika

131

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

27-30

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85215617495