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Astrophysical production of $^{146} \mathrm{Sm}$ in nuclear p - processes
/ Oprea, Cristiana (Dubna, JINR) ; Mihul, Alexandru (CERN) ; Oprea, Alexandru Ioan (Dubna, JINR) ; Zgura, Sorin (Bucharest, Inst. Space Science) ; Potlog, Mihai (Bucharest, Inst. Space Science) ; Neagu, Alina (Bucharest, Inst. Space Science)
The large time of life of $^{146} \mathrm{Sm}$ suggests the possibility to use this p - nuclide as astrophysical chronometer to study the geochemical galactic evolution. Due to the high temperature and large densities of gamma quanta, neutrons and protons in stellar environment $^{146} \mathrm{Sm}$ nucleus can be obtained in (γ,n), (n,2n), (p,2n) processes on $^{146} \mathrm{Sm}$ .The knowledge of corresponding cross sections of gamma rays, neutrons and alpha induced processes is of a great importance for the explanation of ($^{146} \mathrm{Sm}$ /$^{144} \mathrm{Sm}$ ) ratio uncertainties observed on the Earth, meteorites, Moon and other celestial bodies.Cross sections of (γ,n), (n,2n), (α,γ) processes induced by fast gamma rays, neutrons and alphas on $^{147} \mathrm{Sm}$ and $^{142} \mathrm{Nd}$ from threshold up to 25 MeV were evaluated and predicted in the frame of Hauser-Feshbach statistical model by using Talys software and the own computer programs. [...]
2020 - 11 p.
- Published in : J. Phys.: Conf. Ser. 1668 (2020) 012031
Fulltext: PDF;
In : 9th Nuclear Physics in Astrophysics, Frankfurt, Germany, 15 - 20 Sep 2019, pp.012031
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Isomers production in $^{238}$U photofission
/ Oprea, C (Dubna, JINR) ; Mihul, A (CERN) ; Oprea, A I (Dubna, JINR) ; Gruia, I (Bucharest U.) ; Maslov, O D (Dubna, JINR) ; Belov, A G (Dubna, JINR) ; Gustova, M V (Dubna, JINR)
The fission process induced by gamma quanta up to 25 MeV energy on $^{238}$U was analyzed. Experimental observables as cross sections, fragments mass distribution yields of some nuclides of interest and average prompt neutrons multiplicity characterizing $^{238}$U photofission process were theoretically evaluated using TALYS 1.9 software. [...]
Società Italiana di Fisica, 2019 - 4 p.
- Published in : Nuovo Cimento C 42 (2019) 138
Fulltext: PDF;
In : European Nuclear Physics Conference 2018, Bologna, Italy, 2 - 7 Sep 2018, pp.138
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Neutron capture cross sections and strength functions on 147 Sm
/ Oprea, C (Dubna, JINR) ; Mihul, A (Romanian Space Agency) ; Oprea, A (Dubna, JINR)
Cross sections and strength functions in neutron induced reactions on 147 Sm
nucleus from slow neutrons up to 15-20 MeV's were evaluated. The neutron
resonance parameters, transmission coefficients and the Hauser – Feshbach
formalism were included in the calculations [...]
Geneva : CERN, 2019 - 6 p.
- Published in : CERN Proc.: 1 (2019) , pp. 125-130
Fulltext: PDF;
In : 15th International Conference on Nuclear Reaction Mechanisms, Varenna, Italy, 11 - 15 Jun 2018, pp.125-130
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Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP
/ ALEPH Collaboration
Electroweak measurements performed with data taken at the electron-positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3~fb$^{-1}$ collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from $130~GeV$ to $209~GeV$ [...]
arXiv:1302.3415; CERN-PH-EP-2013-022; CERN-PH-EP-2013-022.-
Geneva : CERN, 2013 - 126 p.
- Published in : Phys. Rep. 532 (2013) 119-244
Draft (restricted): PDF; Fulltext: CERN-PH-EP-2013-022 - PDF; arXiv:1302.3415 - PDF; External link: Preprint
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Search for Charged Higgs bosons: Combined Results Using LEP data
/ ALEPH, DELPHI, L3 and OPAL Collaborations
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Higgs Doublet Models (2HDMs). The data of the four experiments are statistically combined. [...]
arXiv:1301.6065; CERN-PH-EP-2012-369; CERN-PH-EP-2012-369; LHWG-Note-2012-01; ALEPH-2012-001-PHYSICS-2012-001; DELPHI-2012-001-PHYS-953; L3-Note-2835; OPAL-PR433.-
Geneva : CERN, 2013 - 18 p.
- Published in : Eur. Phys. J. C 73 (2013) 2463
Draft (restricted): PDF; Fulltext: CERN-PH-EP-2012-369 - PDF; arXiv:1301.6065 - PDF; External link: Preprint
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