Neutrino induced reactions for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ν</mml:mi></mml:math>-process nucleosynthesis of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>92</mml:mn></mml:msup></mml:math>Nb and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>98</mml:mn></mml:msup></mml:math>Tc

Cheoun, Myung-Ki; Ha, Eunja; Hayakawa, Takehito; Chiba, Satoshi; Nakamura, Ko; Kajino, Toshitaka; Mathews, Grant J.

doi:10.1103/physrevc.85.065807

Cited by 53 publications

(75 citation statements)

References 45 publications

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“…In total we find also for 22 Na an increase of the relative importance of charged-current channels. We can also confirm significant contributions of the ν process to the production of 92 Nb and 98 Tc due to electron neutrino absorption on the corresponding isobars, as also discussed in [17]. Indication for 92 Nb has also been found in meteorites and the abundance ratio 92 Nb/ 93 Nb in the early solar system has been estimated to be approximately 10 − 5 [18].…”

Section: Impact On Radioactive Nucleisupporting

confidence: 64%

Neutrino nucleosynthesis in core-collapse Supernova explosions

Sieverding

Huther

Martı́nez-Pinedo

et al. 2016

EPJ Web of Conferences

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Abstract. The neutrino-induced nucleosynthesis (ν process) in supernova explosions of massive stars of solar metallicity with initial main sequence masses between 15 and 40 M has been studied. A new extensive set of neutrino-nucleus cross-sections for all the nuclei included in the reaction network is used and the average neutrino energies are reduced to agree with modern supernova simulations. Despite these changes the ν process is found to contribute still significantly to the production of the nuclei 7 Li, 11 B, 19 F, 138 La and 180 Ta, even though the total yields for those nuclei are reduced. Furthermore we study in detail contributions of the ν process to the production of radioactive isotopes 26 Al, 22 Na and confirm the production of 92 Nb and 98 Tc.

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Section: Impact On Radioactive Nucleisupporting

confidence: 64%

Neutrino nucleosynthesis in core-collapse Supernova explosions

Sieverding

Huther

Martı́nez-Pinedo

et al. 2016

EPJ Web of Conferences

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“…In the O-Ne-Mg layer, whose density is assumed to be about ρ ∼ 10 3 g/cm 3 , neutrino-induced reactions might play an important role of producing some p nuclei, which are odd-odd neutron-deficient nuclei. For example, the cosmological origins of 180 Ta and 065502-1 0556-2813/2013/87(6)/065502 (8) ©2013 American Physical Society 138 La are believed to originate from the ν-process [6,7]. Other light nuclei abundances are also closely associated with the neutrino interactions in He-C layer [8].…”

Section: Introductionmentioning

confidence: 99%

Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and12C

et al. 2013

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Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and ¹²C Physical Review C, 2013; 87(6) 3. The right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)' web home page or employer's website and to make copies of all or part of the Article, including the APS-prepared version without revision or modification, for the author(s)' and/or the employer's use for educational or research purposes.": February 2014PHYSICAL REVIEW C 87, 065502 (2013) Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and 12 C The nucleon form factors in free space are usually thought to be modified when a nucleon is bound in a nucleus or immersed in a nuclear medium. We investigate effects of the density-dependent axial and weak-vector form factors on the electroneutrino (ν e ) and anti-electroneutrino (ν e ) reactions with incident energy E ν 80 MeV via neutral current (NC) for a nucleon in a nuclear medium or 12 C. For the density-dependent form factors, we exploit the quark-meson-coupling (QMC) model, and apply them to the ν e andν e induced reactions by NC. About 12% decrease of the total cross section by the ν e reaction on the nucleon is obtained at normal density, ρ = ρ 0 ∼ 0.15 fm −3 , as well as about 18% reduction of the total ν e cross section on 12 C, by the modification of the weak form factors of the bound nucleon. However, similarly to the charged current reaction, effects of the nucleon property change in theν e reaction reduce significantly the cross sections about 30% for the nucleon in matter and 12 C cases. Such a large asymmetry in theν e cross sections is addressed to originate from the different helicities ofν e and ν e .

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“…For the present application we have utilized rates for these two reactions calculated (Cheoun et al 2012) using the quasiparticle random phase approximation (QRPA) with neutron-proton pairing as well as neutron-neutron, and proton-proton pairing correlations. This QRPA method has been successfully applied to describe the relevant neutrino-induced reaction data for 12 C (Cheoun et al 2010b), as well as the heavy nuclides 138 La, and 180 Ta (Cheoun et al 2010a (Heger et al 2005;Byelikov et al 2007).…”

Section: Neutrino-nucleus Interactionsmentioning

confidence: 99%

SUPERNOVA NEUTRINO NUCLEOSYNTHESIS OF THE RADIOACTIVE ⁹² Nb OBSERVED IN PRIMITIVE METEORITES

Hayakawa

Nakamura

Kajino

et al. 2013

ApJ

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The isotope 92 Nb decays to 92 Zr with a half-life of 3.47 × 10 7 yr. Although this isotope does not exist in the current solar system, initial abundance ratios for 92 Nb/ 93 Nb at the time of solar system formation have been measured in primitive meteorites. The astrophysical origin of this material, however, has remained unknown. In this Letter, we present new calculations which demonstrate a novel origin for 92 Nb via neutrino-induced reactions in core-collapse supernovae (ν-process). Our calculated result shows that the observed ratio of 92 Nb/ 93 Nb ∼ 10 −5 can be explained by the ν-process.

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Neutrino induced reactions forν-process nucleosynthesis of92Nb and98Tc

Cited by 53 publications

References 45 publications

Neutrino nucleosynthesis in core-collapse Supernova explosions

Neutrino nucleosynthesis in core-collapse Supernova explosions

Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and12C

SUPERNOVA NEUTRINO NUCLEOSYNTHESIS OF THE RADIOACTIVE ⁹² Nb OBSERVED IN PRIMITIVE METEORITES

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Neutrino induced reactions forν-process nucleosynthesis of92Nb and98Tc

Cited by 53 publications

References 45 publications

Neutrino nucleosynthesis in core-collapse Supernova explosions

Neutrino nucleosynthesis in core-collapse Supernova explosions

Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and12C

SUPERNOVA NEUTRINO NUCLEOSYNTHESIS OF THE RADIOACTIVE 92 Nb OBSERVED IN PRIMITIVE METEORITES

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SUPERNOVA NEUTRINO NUCLEOSYNTHESIS OF THE RADIOACTIVE ⁹² Nb OBSERVED IN PRIMITIVE METEORITES