A new determination of the astrophysical S-factor S{sub E1} of the {sup 12}C({alpha},{gamma}){sup 16}O reaction.

Journal Article · Fri Aug 03 00:00:00 EDT 2007 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.99.052502· OSTI ID:915731

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

A new measurement of the {beta}-delayed {alpha} decay of {sup 16}N has been performed using a set of high efficiency ionization chambers. Sources were made by implantation of a {sup 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 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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 915731
• Report Number(s): ANL/PHY/JA-58895; PRLTAO; TRN: US0804364
• Journal Information: Phys. Rev. Lett., Vol. 99, Issue Aug. 3, 2007; ISSN 0031-9007
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXTRAPOLATION
IONIZATION CHAMBERS
CARBON 12 REACTIONS
OXYGEN 16 TARGET
NITROGEN 16
DECAY