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New determination of the $^{12}C (\alpha, \gamma)^{16}O$ reaction rate from the gamma-ray angular distribution measurements
- Source :
- Nuclear Physics A, Nuclear Physics A, Elsevier, 2005, 752, pp.514c. ⟨10.1016/j.nuclphysa.2005.02.056⟩
- Publication Year :
- 2005
- Publisher :
- HAL CCSD, 2005.
-
Abstract
- The astrophysical reaction rate of the key reaction 12C(alpha,gamma)16O has been determined with the +/- 25% accuracy by two direct experiments at the Stuttgart DYNAMITRON in the framework of a large internatiuonal collaboration. The E1 and E2 capture amplitudes were deduced from 37 new gamma angular distributions in the energy range Ecm = 0.89-2.8 MeV. Highest sensitivity at a picobarn level was reached by using either a close 4pi array of 9 EUROGAM Phase II detectors or the GANDI array of 4 large movable Ge detectors. The S-factor values of the S_E1 and S_E2 excitation functions were calculated by a R-matrix analysis considering also elastic alpha-scattering data and the beta-delayed alpha-decay on 16N.
- Subjects :
- [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Subjects
Details
- Language :
- English
- ISSN :
- 03759474
- Database :
- OpenAIRE
- Journal :
- Nuclear Physics A, Nuclear Physics A, Elsevier, 2005, 752, pp.514c. ⟨10.1016/j.nuclphysa.2005.02.056⟩
- Accession number :
- edsair.dedup.wf.001..93c9305790860f34da013d6875c99f2e