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

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About: Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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 originates from 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 excludes the Be-7+He-4 reaction channel as an explanation for the Li-7 deficit. 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 originates from 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 excludes the Be-7+He-4 reaction channel as an explanation for the Li-7 deficit. (en)
Title	Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem (en)
skos:prefLabel	Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem Search for new resonant states in C-10 and C-11 and their impact on the cosmological lithium problem (en)
skos:notation	RIV/61389005:_____/13:00424380!RIV14-AV0-61389005
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Mrázek, Jaromír
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	104268
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/13:00424380
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Wilkinson Microwave Anisotropy Probe; abundance (en)
http://linked.open.../riv/klicoveSlovo	Wilkinson Microwave Anisotropy Probe abundance
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[527AAF6D8189]
http://linked.open...i/riv/nazevZdroje	Physical Review. C
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	31 (xsd:int)
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	88
http://linked.open...iv/tvurceVysledku	Assie, M. Mrázek, Jaromír Coc, A. Audouin, L. Franchoo, S. Stefan, I. Ancelin, S. Beaumel, D. Fernandez-Dominguez, B. Fox, S. Hamadache, C. Hammache, F. Kiener, J. Laird, A. Le Crom, B. Lefebvre, L. Lefebvre-Schuhl, A. Matea, I. Matta, A. Mavilla, G. Roussel, P. de Sereville, N.
http://linked.open...ain/vavai/riv/wos	000328582400001
issn	0556-2813
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevC.88.062802

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