☆ 4.5 Article

Resonance triplet at Eα=4.5 MeV in the 40Ca(α,γ)44Ti reaction

PHYSICAL REVIEW C (2013)

期刊

PHYSICAL REVIEW C

卷 88, 期 2, 页码 -

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AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.88.025803

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Physics, Nuclear

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DFG [BE4100/2-1]

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The Ca-40(alpha, gamma)(44) Ti reaction is believed to be the main production channel for the radioactive nuclide Ti-44 in core-collapse supernovae. Radiation from decaying Ti-44 has been observed so far two supernova remnants, and precise knowledge of the Ti-44 production rate may help improve supernova models. The Ca-40(alpha, gamma)(44) Ti astrophysical reaction rate is determined by a number of narrow resonances. Here, the resonance triplet at E-alpha = 4497, 4510, and 4523 keV is studied both by activation, using an underground laboratory for the gamma counting, nuclear reactions. The strengths of the three resonances are determined to be omega gamma = (0.92 +/- 0.20), (6.2 +/- 0.5), and (1.32 +/- 0.24) eV, respectively, a factor of 2 more precise than before. The strengths of this resonance triplet may be used in future works as a point of reference. In addition, the present new data directly affect the astrophysical reaction rate at relatively high temperatures (above 3.5 GK).

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Proceedings Paper Astronomy & Astrophysics

Coulomb dissociation of O-16 into He-4 and C-12

Lukas Thomas Bott, Kathrin Gobel, Michael Heil, Aleksandra Kelic-Heil, Rene Reifarth, Marialuisa Aliotta, Tahani Almusidi, Hector Alvarez-Pol, Leyla Atar, Liam Atkins, Thomas Aumann, Daniel Bemmerer, Jose Benlliure, Carlos Bertulani, Konstanze Boretzky, Benjamin Bruckner, Leonhard Brandenburg, Giovanni Bruni, Pablo Cabanelas Eiras, Christoph Caesar, Enrique Casarejos, Joakim Cederkall, Leonid Chulkov, Dolores Cortina-Gil, Andrey Danilov, Enrico De Filippo, Sophia Florence Dellmann, Isabell Deuter, Jose Antonio Duenas Diaz, Meytal Duer, Zoltan Elekes, Philipp Erbacher, Sonia Escribano Rodriguez, Zsolt Fulop, Ashton Falduto, Manuel Feijoo, Stefan Fiebiger, Igor Gasparic, Daniel Galaviz, Maria Jose Garcia Borge, Gabriel Garcia-Jimenez, Elena Geraci, Roman Gernhauser, Jan Glorius, Brunilde Gnoffo, David Gonzalez Caamano, Antia Grana Gonzalez, Alexander Grein, Anna-Lena Hartig, Tanja Heftrich, Henning Heggen, Marcel Heine, Andreas Heinz, Corinna Henrich, Thomas Hensel, Matthias Holl, Ilja Homm, Akos Horvath, Andrea Horvat, Andrea Jedele, Desa Jelavic Malenica, Tobias Jenegger, Hakan T. Johansson, Bjorn Jonson, Julian Kahlbow, Nasser Kalantar-Nayestanaki, Armel Kamenyero, Kafa Khasawneh, Oleg Kiselev, Philipp Klenze, Marco Knosel, Karsten Koch, Marvin Kohls, Daniel Korper, Thorsten Kroll, Sabina Krasilovskaja, Dmytro Kresan, Deniz Kurtulgil, Nikolaus Kurz, Bastian Loher, Christoph Langer, Claudia Lederer-Woods, Christopher Lehr, Yuri A. Litvinov, Enis Lorenz, Nunzia Simona Martorana, Tohru Motobayashi, Silvia Murillo Morales, Enrique Nacher, Thomas Nilsson, Emanuele Vincenzo Pagano, Valerii Panin, Joochun Park, Stefanos Paschalis, Angel Perea, Marina Petri, Sara Pirrone, Ralf Plag, Lukas Ponnath, Romana Popocovsk, Markus Reich, Han-Bum Rhee, Jose Luis Rodriguez Sanchez, Dominic Rossi, Paolo Russotto, Angel-Miguel Sanchez-Benitez, Christian Surder, Deniz Savran, Heiko Scheit, Konrad Schmidt, Hendrik Schulte, Haik Simon, Johannes Simon, Viktor Starostin, Sonja Storck-Dutine, Hans Toshihide Tornqvist, Junki Tanaka, Olof Tengblad, Benedikt Thomas, Marina Trimarchi, Stefan Typel, Laszlo Varga, Klaus Volk, Meiko Volknandt, Vadim Wagner, Felix Wamers, Mario Weigand, Lorenzo Zanetti

Summary: We measured the Coulomb dissociation of O-16 into He-4 and C-12 at GSI Helmholtzzentrum fur Schwerionenforschung Darmstadt, Germany. With this indirect method, we aim to improve the accuracy of the experimental data at lower energies. New detector systems were built to cope with the high-intensity O-16 beam.

NUCLEAR PHYSICS IN ASTROPHYSICS - X, NPA-X 2022 (2023)

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Proceedings Paper Astronomy & Astrophysics

Deuterium burning measurement at LUNA and its astrophysical and nuclear implications

Francesca Cavanna

Summary: The deuterium burning reaction D(p,gamma)He-3 at low energies is important in cosmology as it affects the primordial deuterium abundance and can test ab-initio calculations in theoretical nuclear physics. A recent study of this reaction in the 30 ≤ E-cm[keV] ≤ 280 energy range was presented, conducted by the LUNA collaboration in the Gran Sasso Laboratory. The need for new and precise measurements of the D(d,n)He-3 and D(d,p)H-3 reactions was also discussed.

NUCLEAR PHYSICS IN ASTROPHYSICS - X, NPA-X 2022 (2023)

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Article Physics, Nuclear

Cross section measurement of the 12C(p,?)13N reaction with activation in a wide energy range

Gy. Gyurky, L. Csedreki, T. Szucs, G. G. Kiss, Z. Halasz, Zs. Fulop

Summary: The CNO cycle is an important process in hydrogen burning in stars. In this study, the cross section of the C-12(p,?)N-13 reaction was measured using the activation method. The obtained data provides an independent dataset for future astrophysical reaction rate calculations.

EUROPEAN PHYSICAL JOURNAL A (2023)

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