Recoil separator ERNA: charge state distribution, target density, beam heating, and longitudinal acceptance☆

Schürmann, D.; Strieder, F.; Dileva, A.; Gialanella, L.; DECESARE, N; D’Onofrio, Antonio; Imbriani, G.; Klug, J. N.; Lubritto, Carmine; Ordine, A.

doi:10.1016/s0168-9002(04)01289-6

Cited by 5 publications

(17 citation statements)

References 3 publications

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“…The extrapolation of the S-factor at the solar Gamow peak energy must be taken from models. The experimental determination of the 7 Be(p, γ) 8 B cross section suffers similar problems as was for 3 He(α, γ) 7 Be, see e.g. [15] for a detailed discussion.…”

Section: Introductionmentioning

confidence: 88%

“…For this purpose the nuclear cross sections of the processes involved in hydrogen burning must be known with adequate precision. The experimental uncertainty on the 3 He(α, γ) 7 Be and 7 Be(p, γ) 8 B reactions directly reflects on the predicted fluxes of 7 Be and 8 B neutrinos, see e.g. [1], that are a major contribution to the high energy component of the solar neutrino spectrum, to which most of the observations are sensitive.…”

Section: Introductionmentioning

confidence: 99%

“…[1], that are a major contribution to the high energy component of the solar neutrino spectrum, to which most of the observations are sensitive. The precision determination of the reaction rates of reactions producing and destroying 7 Be is also relevant for the production of Li isotopes during Big Bang Nucleosynthesis (BBN) that occurs at energies significantly higher than solar, i.e. ∼ 100 − 400 MK, see e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The total cross section of the 3 He(α, γ) 7 Be reaction was measured with high precision over a wide energy range, E cm = 0.65 to 3.2 MeV [9,10]. Because of the different systematics with respect to other measurements it was possible to solve a long lasting discrepancy between the results obtained by grouping experiments by measurement technique.…”

Section: Introductionmentioning

confidence: 99%

“…Briefly direct measurements of the cross section were performed using the same experimental approach, i.e. a 7 Be radioactive target and an intense proton beam. Systematic differences are observed between results of the different experiments, for both the absolute scale and for the energy dependence.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Reducing experimental uncertainties on production and destruction of 7 Be in hydrogen burning

Leva

Baltador

Gialanella

et al. 2013

Proceedings of XII International Symposium on Nuclei in the Cosmos — PoS(NIC XII)

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The observational constrains given by the detected solar neutrino fluxes are weakened by the uncertainties affecting solar model calculations. This is the case of the uncertainty on the determination of 7 Be(p, γ) 8 B and 3 He(α, γ) 7 Be, since the neutrinos produced in the decay of 8 B and 7 Be represent a major contribution to the high energy component of the neutrino spectrum, to which many observations are sensitive. Moreover these cross sections play a significant role in the determination of the mixing during shell hydrogen burning, as well as in Big Bang Nucleosynthesis. With the aim of reducing the uncertainties on these reactions, eventually due to systematic effects, the ERNA collaboration has undertaken a research program based on the use of a recoil mass separator. The 3 He(α, γ) 7 Be reaction was investigated recently, the results have given a substantial improvement in the understanding of this process. The follow up will be the study of 7 Be(p, γ) 8 B in inverse kinematics. The recoil separator, previously installed at the Ruhr University (Bochum, Germany), has been moved and recommissioned, after a significant upgrade, at the CIRCE laboratory of the Second University of Naples -INNOVA (Caserta, Italy). The experimental setup and the development of an intense 7 Be beam to allow measurements at energies as low as E cm ∼ 350 keV" is presented.

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Reducing experimental uncertainties on production and destruction of 7 Be in hydrogen burning

Leva

Baltador

Gialanella

et al. 2013

Proceedings of XII International Symposium on Nuclei in the Cosmos — PoS(NIC XII)

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Exploratory investigation of the HIPPO gas-jet target fluid dynamic properties

Meisel

Shi

Jemcov

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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In order to optimize the performance of gas-jet targets for future nuclear reaction measurements, a detailed understanding of the dependence of the gas-jet properties on experiment design parameters is required. Common methods of gas-jet characterization rely on measuring the effective thickness using nuclear elastic scattering and energy loss techniques; however, these tests are time intensive and limit the range of design modifications which can be explored to improve the properties of the jet as a nuclear reaction target. Thus, a more rapid jet-characterization method is desired. We performed the first steps towards characterizing the gas-jet density distribution of the HIPPO gas-jet target at the University of Notre Dame's Nuclear Science Laboratory by reproducing results from 20 Ne(α, α) 20 Ne elastic scattering measurements with computational fluid dynamics (CFD) simulations performed with the state-of-the-art CFD software ANSYS Fluent. We find a strong sensitivity to experimental design parameters of the gas-jet target, such as the jet nozzle geometry and ambient pressure of the target chamber. We argue that improved predictive power will require moving to three-dimensional simulations and additional benchmarking with experimental data.

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The status and future of direct nuclear reaction measurements for stellar burning

Aliotta¹,

Buompane²,

Couder³

et al. 2021

J. Phys. G: Nucl. Part. Phys.

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The study of stellar burning began just over 100 years ago. Nonetheless, we do not yet have a detailed picture of the nucleosynthesis within stars and how nucleosynthesis impacts stellar structure and the remnants of stellar evolution. Achieving this understanding will require precise direct measurements of the nuclear reactions involved. This report summarizes the status of direct measurements for stellar burning, focusing on developments of the last couple of decades, and offering a prospectus of near-future developments.

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Recoil separator ERNA: charge state distribution, target density, beam heating, and longitudinal acceptance☆

Cited by 5 publications

References 3 publications

Reducing experimental uncertainties on production and destruction of 7 Be in hydrogen burning

Reducing experimental uncertainties on production and destruction of 7 Be in hydrogen burning

Exploratory investigation of the HIPPO gas-jet target fluid dynamic properties

The status and future of direct nuclear reaction measurements for stellar burning

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