β-delayed α spectrum of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">N</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>16</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> and the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>(α,γ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mo>)</mo></mrow><mrow><mn>16</mn></mrow></msup></mrow></math>O cross section at low energies

L. Buchmann; R. E. Azuma; C. A. Barnes; J. M. D’Auria; M. Dombsky; U. Giesen; K. P. Jackson; J. D. King; R. G. Korteling; P. McNeely; J. Powell; G. Roy; J. Vincent; T. R. Wang; S. S. M. Wong; P. R. Wrean

doi:10.1103/PhysRevLett.70.726

β-delayed α spectrum of ${}^{16}N$ and the ${}^{12}C$ (α,γ $)^{16}$ O cross section at low energies

L. Buchmann, R. E. Azuma, C. A. Barnes, J. M. D’Auria, M. Dombsky, U. Giesen, K. P. Jackson, J. D. King, R. G. Korteling, P. McNeely, J. Powell, G. Roy, J. Vincent, T. R. Wang, S. S. M. Wong, and P. R. Wrean

Phys. Rev. Lett. 70, 726 – Published 8 February 1993

Abstract

The α spectrum following the β decay of ${}^{16}N$ from the isotope separator TISOL has been measured by detecting $10^{6}$ α particles in coincidence with ${}^{12}C$ nuclei. These data, which show a low-energy interference anomaly accompanying the main α peak, permit a more precise determination of the p-wave amplitude of the astrophysically important reaction ${}^{12}C$ (α,γ $)^{16}$ O. The α spectrum and previous γ-ray data have been fitted simultaneously by a K-matrix parametrization; a value of S(E=0.3 MeV)=57±13 keV b has been obtained for the E1 part of the ${}^{12}C$ (α,γ $)^{16}$ O reaction.

Received 3 November 1992

DOI:https://doi.org/10.1103/PhysRevLett.70.726

Authors & Affiliations

L. Buchmann, R. E. Azuma, C. A. Barnes, J. M. D’Auria, M. Dombsky, U. Giesen, K. P. Jackson, J. D. King, R. G. Korteling, P. McNeely, J. Powell, G. Roy, J. Vincent, T. R. Wang, S. S. M. Wong, and P. R. Wrean

TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
University of Toronto, Toronto, Ontario, Canada M5S 1A7
California Insitute of Technology, W. K. Kellogg Laboratory, Pasadena, California 91125
Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
University of Alberta, Edmonton, Alberta, Canada T6G 2J1