New determination of the astrophysical S factor S-E1 of the C-12(alpha,gamma)O-16 reaction

作者：Tang X D^*; Rehm K E; Ahmad I; Brune C R; Champagne A; Greene J P; Hecht A A; Henderson D; Janssens R V F; Jiang C L; Jisonna L; Kahl D; Moore E F; Notani M; Pardo R C; Patel N; Paul M; Savard G; Schiffer J P; Segel R E; Sinha S; Shumard B; Wuosmaa A H

来源：Physical Review Letters, 2007, 99(5): 052502.

DOI：10.1103/PhysRevLett.99.052502

A new measurement of the beta-delayed alpha decay of N-16 has been performed using a set of high efficiency ionization chambers. Sources were made by implantation of a N-16 beam, yielding very clean alpha spectra down to energies as low as 400 keV. Our data are in good agreement with earlier results. For the S factor S-E1, we obtain a value of 74 +/- 21 keV b. In spite of improvements in the measurement, the error in S-E1 remains relatively large because of the correlations among the fit parameters and the uncertainties inherent to the extrapolation.

• 出版日期2007-8-3
• 单位西北大学