Anup Yadav

Gas-jet target with online interferometric thickness measurement for nuclear astrophysics

Anup Yadav, D. Bemmerer, Fabian Donat, Juozas Dudutis et autres

A new jet gas target system has been developed for the Felsenkeller 5 MV underground ion accelerator for nuclear astrophysics. It provides either a 1.5 × 10 18 atoms/cm 2 thick cylindrical jet or a 8 × 10 17 atoms/cm 2 thick …

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Photo-response of the $$N=Z$$ nucleus 28Si below 13.0 MeV

M. Scheck, R. Schwengner, O. Ağar, R. Beyer et autres

Abstract The electric E1 and magnetic M1 dipole responses of the $$N=Z$$ N = Z nucleus 28Si were investigated in a nuclear resonance fluorescence experiment at the ELBE accelerator of the Helmholtz Zentrum Dresden-Rossendorf. The investigated energy range extends to 13.0 MeV, …

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Total cross section of N 14 + n from 0.1 to 12 MeV

Arnd Rudolf Junghans, R. Arquette, D. Bemmerer, Andreas Best et autres

The reaction $^{14}$N$(n,p)^{14}$C is one of the main neutron poisons during $s$-process nucleosynthesis. In addition, the reaction provides insight into the yields of atmospheric nuclear weapon testing. Because of their high level of sensitivity, total neutron cross sections provide a great deal …

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The Felsenkeller shallow-underground laboratory for nuclear astrophysics

D. Bemmerer, A. Boeltzig, Marcel Grieger, Katharina Gudat et autres

Abstract In the Felsenkeller shallow-underground site, protected from cosmic muons by a 45 m thick rock overburden, a research laboratory including a 5 MV Pelletron ion accelerator and a number of radioactivity-measurement setups is located. The laboratory and its installations are described …

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Photoexcitation of Co 59

R. Schwengner, R. Massarczyk, R. Beyer, N. Benouaret et autres

The dipole strength of the nuclide $^{59}\mathrm{Co}$ was studied in photon-scattering experiments using bremsstrahlung produced with electron beams of energies of 8.6 and 12.2 MeV at the bremsstrahlung facility $\ensuremath{\gamma}\mathrm{ELBE}$. We identified 130 levels up to an excitation energy of 10.5 MeV. …

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The Felsenkeller shallow-underground laboratory for nuclear astrophysics

D. Bemmerer, A. Boeltzig, Marcel Grieger, Katharina Gudat et autres

In the Felsenkeller shallow-underground site, protected from cosmic muons by a 45 m thick rock overburden, a research laboratory including a 5 MV Pelletron ion accelerator and a number of radioactivity-measurement setups is located. The laboratory and its installations are described in …

Underground nuclear astrophysics: Status and recent results from Felsenkeller laboratory

E. Masha, D. Bemmerer, A. Boeltzig, Konrad Schmidt et autres

For almost three decades it has been known that the study of astro-physically important nuclear reactions between stable nuclei requires the use of low-background, underground accelerator laboratories. The Felsenkeller shallow-underground laboratory in Dresden, shielded by a 45 m thick rock cover, hosts …

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Improved S factor of the C 12 ( p , γ ) N 13 reaction at E = 320 – 620 keV and the 422 keV resonance

J. Skowronski, E. Masha, D. Piatti, Marialuisa Aliotta et autres

The $^{12}\mathrm{C}(p,\ensuremath{\gamma})^{13}\mathrm{N}$ reaction is the onset process of both the CNO and hot CNO cycles that drive massive star, red and asymptotic giant branch star, and novae nucleosynthesis. The $^{12}\mathrm{C}(p,\ensuremath{\gamma})^{13}\mathrm{N}$ rate affects the final abundances of the stable $^{12,13}\mathrm{C}$ nuclides with ramifications …

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Development of a jet gas target system for the Felsenkeller underground accelerator

Anup Yadav, Konrad Schmidt, D. Bemmerer

For direct cross section measurements in nuclear astrophysics, in addition to suitable ion beams and detectors, also highly pure and stable targets are needed. Here, using a gas jet as a target offers an attractive approach that combines high stability even under …

de (code pays fourni par la source)

Development of a jet gas target system for the Felsenkeller underground accelerator

Anup Yadav, Konrad Schmidt, D. Bemmerer

For direct cross-section measurements in nuclear astrophysics, in addition to suitable ion beams and detectors, also highly pure and stable targets are needed. Here, using a gas jet as a target offers an attractive approach that combines high stability even under significant …