Author
N. De Cesare
Other affiliations: Seconda Università degli Studi di Napoli, University of Naples Federico II
Bio: N. De Cesare is an academic researcher from Istituto Nazionale di Fisica Nucleare. The author has contributed to research in topics: Accelerator mass spectrometry & Ion. The author has an hindex of 19, co-authored 59 publications receiving 1007 citations. Previous affiliations of N. De Cesare include Seconda Università degli Studi di Napoli & University of Naples Federico II.
Topics: Accelerator mass spectrometry, Ion, Ionization, Proton, Physics
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the results of an experiment using the recoil separator ERNA (European Recoil separator for Nuclear Astrophysics) to detect directly the 7Be ejectiles were presented.
Abstract: The 3He(alpha,gamma)7Be reaction presently represents the largest nuclear uncertainty in the predicted solar neutrino flux and has important implications on the big bang nucleosynthesis, i.e., the production of primordial 7Li. We present here the results of an experiment using the recoil separator ERNA (European Recoil separator for Nuclear Astrophysics) to detect directly the 7Be ejectiles. In addition, off-beam activation and coincidence gamma-ray measurements were performed at selected energies. At energies above 1 MeV a large discrepancy compared to previous results is observed both in the absolute value and in the energy dependence of the cross section. Based on the available data and models, a robust estimate of the cross section at the astrophysical relevant energies is proposed.
105 citations
TL;DR: In this article, the state-of-the-art CIRCE AMS preparation laboratory is described, particularly the setup and optimization of an alternative method, the zinc reduc- tion method, for graphite target production, compared to the more common hydrogen reduction method.
Abstract: The pretreatment of samples for radiocarbon measurements, transforming a variety of materials into graphite solid targets, represents a critical point in the accelerator mass spectrometry (AMS) procedure. We describe the new, state-of- the-art CIRCE AMS preparation laboratory, particularly the setup and optimization of an alternative method, the zinc reduc- tion method, for graphite target production, compared to the more common hydrogen reduction method. Measured 14C values on standard and blank samples reduced via zinc reaction revealed mean background levels, accuracy, and sensitivity compa- rable to those obtained by our conventional hydrogen reaction lines. Zinc line reduction at the CIRCE laboratory represents an effective and powerful alternative to the conventional hydrogen reduction, ensuring higher sample throughput with lower costs at a comparable performance level.
70 citations
TL;DR: The total cross-section of 12C(α,γ)16O was measured for the first time by a direct and ungated detection of the 16O recoils as discussed by the authors.
Abstract: The total cross-section of 12C(α,γ)16O was measured for the first time by a direct and ungated detection of the 16O recoils. This measurement in inverse kinematics using the recoil mass separator ERNA in combination with a windowless He gas target allowed to collect data with high precision in the energy range E = 1.9 to 4.9 MeV. The data represent new information for the determination of the astrophysical S(E) factor.
62 citations
01 Jun 2007-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: A new AMS system has been installed at Center for Isotopic Research on Cultural and Environmental Heritage (CIRCE) in Caserta/Italy as discussed by the authors, which is intended for Radiocarbon AMS; for future Al and Be AMS only minor upgrades are needed and the magnets are designed to bend heavy isotopes like Uranium.
Abstract: A new AMS system has been installed at Center for Isotopic Research on Cultural and Environmental Heritage (CIRCE) in Caserta/Italy. It was built by National Electrostatics Corp. Middleton, WI/USA, and arrived at CIRCE in the middle of January 2005; the installation and the acceptance tests were completed at the end of February 2005. At first, the system is intended for Radiocarbon AMS; for future Al and Be AMS only minor upgrades are needed and the magnets are designed to bend heavy isotopes like Uranium. Concerning Radiocarbon AMS, the first measurements of unknown samples, prepared in the internal preparation laboratory, already yielded results of high precision and 14C dating is in full swing.
54 citations
TL;DR: In this article, the total cross section of 12C(alpha,gamma)16O was measured for the first time by a direct and ungated detection of the 16O recoils.
Abstract: The total cross section of 12C(alpha,gamma)16O was measured for the first time by a direct and ungated detection of the 16O recoils. This measurement in inverse kinematics using the recoil mass separator ERNA in combination with a windowless He gas target allowed to collect data with high precision in the energy range E=1.9 to 4.9 MeV. The data represent new information for the determination of the astrophysical S(E) factor.
50 citations
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TL;DR: The JINA REACLIB project as mentioned in this paper maintains a library of thermonuclear reaction rates for astrophysical applications, which are transparently documented and version tracked, and any set of rates is publicly available and can be downloaded via a web interface at http://groups.nscl.msu.edu/jina/reaclib/db/.
Abstract: We present results from the JINA REACLIB project, an ongoing effort to maintain a current and accurate library of thermonuclear reaction rates for astrophysical applications. Ongoing updates are transparently documented and version tracked, and any set of rates is publicly available and can be downloaded via a Web interface at http://groups.nscl.msu.edu/jina/reaclib/db/. We discuss here our library V1.0, a snapshot of recommended rates for stable and explosive hydrogen and helium burning. We show that the updated reaction rates lead to modest but significant changes in full network, one-dimensional X-ray burst model calculations, compared with calculations with previously used reaction rate sets. The late time behavior of X-ray burst light curves shows significant changes, suggesting that the previously found small discrepancies between model calculations and observations may be solved with a better understanding of the nuclear input. Our X-ray burst model calculations are intended to serve as a benchmark for future model comparisons and sensitivity studies, as the complete underlying nuclear physics is fully documented and publicly available.
840 citations
University of Washington1, University of Wisconsin-Madison2, Texas A&M University3, National Taiwan University4, University of Genoa5, University of Notre Dame6, TRIUMF7, Lawrence Berkeley National Laboratory8, Yale University9, Hebrew University of Jerusalem10, University of Naples Federico II11, Colorado School of Mines12, Weizmann Institute of Science13, Osaka University14, University of South Carolina15, Goethe University Frankfurt16, University of Pisa17, Argonne National Laboratory18, Sungkyunkwan University19, Old Dominion University20, Thomas Jefferson National Accelerator Facility21, University of Catania22, Ruhr University Bochum23, GSI Helmholtz Centre for Heavy Ion Research24, Technische Universität München25
TL;DR: The available data on nuclear fusion cross sections important to energy generation in the Sun and other hydrogen-burning stars and to solar neutrino production are summarized and critically evaluated in this article.
Abstract: The available data on nuclear fusion cross sections important to energy generation in the Sun and other hydrogen-burning stars and to solar neutrino production are summarized and critically evaluated. Recommended values and uncertainties are provided for key cross sections, and a recommended spectrum is given for {sup 8}B solar neutrinos. Opportunities for further increasing the precision of key rates are also discussed, including new facilities, new experimental techniques, and improvements in theory. This review, which summarizes the conclusions of a workshop held at the Institute for Nuclear Theory, Seattle, in January 2009, is intended as a 10-year update and supplement to 1998, Rev. Mod. Phys. 70, 1265.
599 citations
TL;DR: In this paper, the results of ab initio simulations of n -rich, n -poor, heavy-ion collisions, using stochastic isospin-dependent transport equations, are analyzed as a function of beam energy and centrality.
534 citations
TL;DR: The NACRE-II compilation as mentioned in this paper is the most recent compilation of the data and is referred to as NACre II, which reports thermonuclear reaction rates for 34 charged-particle induced, two-body exoergic reactions on nuclides with mass number A 16, of which fifteen are particle transfer reactions and the rest radiative capture reactions.
277 citations
01 Jan 2000
TL;DR: An evaluation of A = 16{17 was published in Nuclear Physics A565 (1993), p. 1. This version of A=16 has been slightly revised as of May 16,200 0t oinclud e hyperlink sfo r reference tables.
Abstract: An evaluation of A = 16{17 was published in Nuclear Physics A565 (1993), p. 1. This version of A = 16 diers from the published version in that we have corrected some errors discovered after the article went to press. It has also been slightly revised as of May 16 ,200 0t oinclud ehyperlink sfo rreference san dtables. Introductor ytables have been omitted from this manuscript. Also, Reference key numbers have been changed to the NNDC/TUNL format.
266 citations