Production of 26Al in stellar hydrogen-burning environments: Spectroscopic properties of states in 27Si

A. Parikh, K. Wimmer, T. Faestermann, R. Hertenberger, H.-F. Wirth, A. A. Chen, J. A. Clark, C. M. Deibel, C. Herlitzius, R. Krücken, D. Seiler, K. Setoodehnia, K. Straub, and C. Wrede
Phys. Rev. C 84, 065808 – Published 27 December 2011

Abstract

Model predictions of the amount of the radioisotope 26Al produced in hydrogen-burning environments require reliable estimates of the thermonuclear rates for the 26gAl(p,γ) 27Si and 26mAl(p,γ)27Si reactions. These rates depend upon the spectroscopic properties of states in 27Si within about 1 MeV of the 26gAl + p threshold (Sp = 7463 keV). We have studied the 28Si(3He,α)27Si reaction at 25 MeV using a high-resolution quadrupole-dipole-dipole-dipole magnetic spectrograph. For the first time with a transfer reaction, we have constrained Jπ values for states in 27Si over Ex = 7.0–8.1 MeV through angular distribution measurements. Aside from a few important cases, we generally confirm the energies and spin-parity assignments reported in a recent γ-ray spectroscopy study. The magnitudes of neutron spectroscopic factors determined from shell-model calculations are in reasonable agreement with our experimental values extracted using this reaction.

  • Figure
  • Figure
  • Figure
  • Received 22 August 2011

DOI:https://doi.org/10.1103/PhysRevC.84.065808

©2011 American Physical Society

Authors & Affiliations

A. Parikh1,2,3,4,*, K. Wimmer3,4,5,†, T. Faestermann3,4, R. Hertenberger4,6, H.-F. Wirth4,6, A. A. Chen7,8, J. A. Clark9, C. M. Deibel9,10,‡, C. Herlitzius3,4, R. Krücken3,4,§, D. Seiler3,4, K. Setoodehnia7, K. Straub3,4,∥, and C. Wrede11,†

  • 1Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, ES-08036 Barcelona, Spain
  • 2Institut d’Estudis Espacials de Catalunya, ES-08034 Barcelona, Spain
  • 3Physik Department E12, Technische Universität München, DE-85748 Garching, Germany
  • 4Maier-Leibnitz-Laboratorium der Münchner Universitäten (MLL), DE-85748 Garching, Germany
  • 5National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 6Fakultät für Physik, Ludwig-Maximilians-Universität München, DE-85748 Garching, Germany
  • 7Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1
  • 8Excellence Cluster Universe, Technische Universität München, DE-85748 Garching, Germany
  • 9Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 10Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
  • 11Department of Physics, University of Washington, Seattle, Washington 98195, USA

  • * anuj.r.parikh@upc.edu
  • Present address: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
  • Present address: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA
  • §Present address: TRIUMF, Vancouver, BC, Canada V6T 2A3
  • Present address: Istituto Nazionale di Fisica Nucleare, IT-56127 Pisa, Italy

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 84, Iss. 6 — December 2011

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×