The $\mathsf{^{27}Al(p,\gamma)^{28}Si}$ reaction: direct capture cross-section and resonance strengths at Ep=0.2 - 1.12 MeV

S. Harissopulos; C. Chronidou; K. Spyrou; T. Paradellis; C. Rolfs; W.H. Schulte; H.W. Becker

doi:doi:10.1007/s100500070006

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2024 Impact factor 2.8

Hadrons and Nuclei

Eur. Phys. J. A 9, 479-489

The $\mathsf{^{27}Al(p,\gamma)^{28}Si}$ reaction: direct capture cross-section and resonance strengths at E_p=0.2-1.12 MeV

S. Harissopulos¹ - C. Chronidou¹ - K. Spyrou¹ - T. Paradellis¹ - C. Rolfs² - W.H. Schulte² - H.W. Becker²

¹ Institute of Nuclear Physics, NCSR ``Demokritos'', POB 60228, GR-15310 Aghia Paraskevi, Athens, Greece
² Institut für Physik mit Ionenstrahlen, Ruhr-Universität-Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany

Received: 4 October 2000 / Revised version: 5 December 2000
Communicated by D. Schwalm

Abstract
The ²⁷Al(p, $\gamma$ )²⁸Si reaction has been investigated using two different 4 $\pi$ NaI summing detectors. The strength of 26 resonances in the energy range from 200 to 1120 keV has been measured. In addition, yield measurements have been carried out at 9 beam energies in the 490 to 1150 keV range in order to determine the direct capture cross-section. The existing data on the non-resonant mechanism were analysed and combined with the results of the present work. The resulting resonance strengths as well as the deduced direct capture astrophysical S-factor are compared with previous work.