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Phys. Rev. C 81, 045809 (2010) [14 pages]

Determination of the E1 component of the low-energy 12C(α,γ)16O cross section

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X. D. Tang1,2, K. E. Rehm1, I. Ahmad1, C. R. Brune3, A. Champagne4, J. P. Greene1, A. Hecht1, D. J. Henderson1, R. V. F. Janssens1, C. L. Jiang1, L. Jisonna5, D. Kahl1,*, E. F. Moore1, M. Notani1,†, R. C. Pardo1, N. Patel1,6, M. Paul7, G. Savard1, J. P. Schiffer1, R. E. Segel5, S. Sinha1,‡, and A. H. Wuosmaa8
1Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
2University of Notre Dame, Notre Dame, Indiana 46556, USA
3Ohio University, Athens, Ohio 45701, USA
4University of North Carolina, Chapel Hill, North Carolina 27599, USA
5Northwestern University, Evanston, Illinois 60208, USA
6Colorado School of Mines, Golden, Colorado 80401, USA
7Racah Institute of Physics, Hebrew University, Jerusalem, 91904, Israel
8Western Michigan University, Kalamazoo, Michigan 49008, USA

Received 30 December 2009; published 29 April 2010

A measurement of the β-delayed α decay of 16N using a set of twin ionization chambers is described. Sources were made by implantation, using a 16N beam produced via the In-Flight Technique. The energies and emission angles of the 12C and α particles were measured in coincidence and very clean α spectra, down to energies of 450 keV, were obtained. The structure of the spectra from this experiment is in good agreement with results from previous measurements. An analysis of our data with the same input parameters as used in earlier studies gives SE1(300)=86±22 keVb for the E1 component of the S-factor. This value is in excellent agreement with results obtained from various direct and indirect measurements. In addition, the influence of new measurements including the phase shift data from Tischhauser et al. on the value of SE1(300) is discussed.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.81.045809
DOI:
10.1103/PhysRevC.81.045809
PACS:
21.10.Pc, 23.60.+e, 25.55.-e, 26.20.-f

*Present address: Center for Nuclear Study (CNS), the University of Tokyo, Japan.

†Present address: University of Notre Dame, Notre Dame, Indiana, USA.

‡Present address: University of California, Davis, California, USA.

 
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