Publikationen

Measurement of the Ca<sup>40</sup>(α,γ)Ti<sup>44</sup> reaction relevant for supernova nucleosynthesis

Autor(en)
Christof Vockenhuber, C O Ouellet, L -S The, L. R. Buchmann, Jac A. Caggiano, A A Chen, Helen Crawford, John M. D'Auria, B.S. Davids, L Fogarty, D Frekers, A Hussein, D A Hutcheon, Walter Kutschera, A M Laird, R Lewis, E O'Connor, D Ottewell, Michael Paul, M M Pavan, J Pearson, C Ruiz, G Ruprecht, M Trinczek, B Wales, Anton Wallner
Abstrakt

The short-lived nuclide Ti44 is an important nuclide for the understanding of explosive nucleosynthesis. The main production reaction, Ca40(I?± ,I?)Ti44, has been studied in inverse kinematics with the recoil mass spectrometer DRAGON located at the TRIUMF-ISAC facility in Vancouver, Canada. The temperature range relevant for I?±-rich freeze-out during a core-collapse supernova has been covered entirely with a Ca40 beam of 0.60 to 1.15 MeV/nucleon. All relevant quantities for the calculation of the astrophysical reaction rate have been measured directly. Because of many previously undiscovered resonances, the reaction rate derived from the energy dependent Ti44 yield is higher than the one based on previous prompt I?-ray studies commonly used in supernova models. The presented new rate results in an increased Ti44 production in supernovae. © 2007 The American Physical Society.

Organisation(en)
Isotopenphysik
Externe Organisation(en)
TRIUMF Canada's National Laboratory for Particle and Nuclear Physics, McMaster University, Clemson University, British Academy, Simon Fraser University, Westfälische Wilhelms-Universität Münster, University of Northern British Columbia (UNBC), University of York, Hebrew University Jerusalem
Journal
Physical Review C
Band
76
Anzahl der Seiten
13
ISSN
0556-2813
DOI
https://doi.org/10.1103/PhysRevC.76.035801
Publikationsdatum
2007
Peer-reviewed
Ja
ÖFOS 2012
103005 Atomphysik
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/measurement-of-the-ca40ti44-reaction-relevant-for-supernova-nucleosynthesis(a88870a0-f13f-411e-8586-807e4824315d).html