Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F13%3A00424380" target="_blank" >RIV/61389005:_____/13:00424380 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevC.88.062802" target="_blank" >http://dx.doi.org/10.1103/PhysRevC.88.062802</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.88.062802" target="_blank" >10.1103/PhysRevC.88.062802</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem

Popis výsledku v původním jazyce

The observed primordial Li-7 abundance in metal-poor halo stars is found to be lower than its Big-Bang nucleosynthesis (BBN) calculated value by a factor of approximately three. Some recent works suggested the possibility that this discrepancy originatesfrom missing resonant reactions which would destroy Be-7, parent of Li-7. The most promising candidate resonances which were found include a possibly missed 1(-) or 2(-) narrow state around 15 MeV in the compound nucleus C-10 formed by Be-7+He-3 and a state close to 7.8 MeV in the compound nucleus C-11 formed by Be-7+He-4. In this work, we studied the high excitation energy region of C-10 and the low excitation energy region in C-11 via the reactions B-10(He-3,t)C-10 and B-11(He-3,t)C-11, respectively,at the incident energy of 35 MeV. Our results for C-10 do not support Be-7+He-3 as a possible solution for the Li-7 problem. Concerning C-11 results, the data show no new resonances in the excitation energy region of interest and this ex

Název v anglickém jazyce

Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem

Popis výsledku anglicky

The observed primordial Li-7 abundance in metal-poor halo stars is found to be lower than its Big-Bang nucleosynthesis (BBN) calculated value by a factor of approximately three. Some recent works suggested the possibility that this discrepancy originatesfrom missing resonant reactions which would destroy Be-7, parent of Li-7. The most promising candidate resonances which were found include a possibly missed 1(-) or 2(-) narrow state around 15 MeV in the compound nucleus C-10 formed by Be-7+He-3 and a state close to 7.8 MeV in the compound nucleus C-11 formed by Be-7+He-4. In this work, we studied the high excitation energy region of C-10 and the low excitation energy region in C-11 via the reactions B-10(He-3,t)C-10 and B-11(He-3,t)C-11, respectively,at the incident energy of 35 MeV. Our results for C-10 do not support Be-7+He-3 as a possible solution for the Li-7 problem. Concerning C-11 results, the data show no new resonances in the excitation energy region of interest and this ex

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Physical Review. C

ISSN

0556-2813

e-ISSN

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Svazek periodika

88

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

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Kód UT WoS článku

000328582400001

EID výsledku v databázi Scopus

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