Measurement of the Ca⁴⁰(α,γ)Ti⁴⁴ 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, The 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