corner
corner

Phys. Rev. Lett. 99, 052502 (2007) [4 pages]

New Determination of the Astrophysical S Factor SE1 of the 12C(α,γ)16O Reaction

Download: PDF (310 kB) Buy this article Export: BibTeX or EndNote (RIS)

X. D. Tang1,*, K. E. Rehm1, I. Ahmad1, C. R. Brune2, A. Champagne3, J. P. Greene1, A. A. Hecht1,4, D. Henderson1, R. V. F. Janssens1, C. L. Jiang1, L. Jisonna5, D. Kahl1,†, E. F. Moore1, M. Notani1,6, R. C. Pardo1, N. Patel1,7, M. Paul8, G. Savard1, J. P. Schiffer1, R. E. Segel5, S. Sinha1,‡, B. Shumard1, and A. H. Wuosmaa9
1Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
2Ohio University, Athens, Ohio 45701, USA
3University of North Carolina, Chapel Hill, North Carolina 27599, USA
4University of Maryland, College Park, Maryland 20742, USA
5Northwestern University, Evanston, Illinois 60208, USA
6Michigan State University, East Lansing, Michigan 48824, USA
7Colorado School of Mines, Golden, Colorado 80401, USA
8Hebrew University, Jerusalem, Israel
9Western Michigan University, Kalamazoo, Michigan 49008, USA

Received 16 March 2007; published 3 August 2007

A new measurement of the β-delayed α decay of 16N has been performed using a set of high efficiency ionization chambers. Sources were made by implantation of a 16N beam, yielding very clean α spectra down to energies as low as 400 keV. Our data are in good agreement with earlier results. For the S factor SE1, we obtain a value of 74±21  keV b. In spite of improvements in the measurement, the error in SE1 remains relatively large because of the correlations among the fit parameters and the uncertainties inherent to the extrapolation.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.052502
DOI:
10.1103/PhysRevLett.99.052502
PACS:
21.10.Pc, 23.60.+e, 25.55.−e, 26.20.+f

*Currently at University of Notre Dame, Notre Dame, IN, USA

Currently at McMaster University, Hamilton, Canada

Currently at University of CA, Davis, CA, USA