✦ LIBER ✦

Uncertainties in the ground state structure of 8B and implications for the S17 astrophysical S-factor

✍ Scribed by F.M. Nunes; R. Crespo; I.J. Thompson

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 614 KB
Volume: 615
Category: Article
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(96)00466-6

No coin nor oath required. For personal study only.

✦ Synopsis

In calculating the 7Be(p,7)SB reaction rate, various single particle models have been used to describe the g.s. of 8B. We show that these models produce electric excitation strength distributions that can differ greatly (-30%) from the pioneering model, providing the community with a wide range of values for the low energy S-factor, even if no other differences in the reaction theory are introduced. When allowing for deformation of the 7Be core, the maximum of the dB(E1)/dE distribution can be reduced by (~--15%) and the peak shifts slightly to higher energies. The change in the B(E1) distribution modifies the low energy behaviour of the astrophysical S-factor and brings a reduction of its overall magnitude. (~) 1997 Elsevier Science B.V.

📜 SIMILAR VOLUMES

Uncertainties in the ground state struct

Uncertainties in the ground state structure of 8B and implications for the S17 Astrophysical S-factor

✍ F.M. Nunes; R. Crespo; I.J. Thompson 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 193 KB

Quadrupole couplings for bound states of 7Be are included in describing the capture reaction 7Be(p,y)8B. We verify, contrary to what we had initially stated (Nucl. Phys. A 615 (1997) 69), that the energy behaviour of the Astrophysical S-factor in the energy range of interest is not significantly sen

Breakup of loosely bound nuclei at inter

Breakup of loosely bound nuclei at intermediate energies as indirect method in nuclear astrophysics: 8B, 9C and the S17, S18 astrophysical factors

✍ L. Trache; F. Carstoiu; C.A. Gagliardi; A.M. Mukhamedzhanov; R.E. Tribble 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 150 KB

The astrophysical S-factor of the reacti

The astrophysical S-factor of the reaction 7Be (p, γ)8B in the direct capture model

✍ H. Krauss; K. Grün; T. Rauscher; H. Oberhummer 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 497 KB

The Magnetic Structure and Electronic Gr

The Magnetic Structure and Electronic Ground States of Mott Insulators GeV4S8 and GaV4S8.

✍ Helen Mueller; Winfried Kockelmann; Dirk Johrendt 📂 Article 📅 2006 🏛 John Wiley and Sons ⚖ 10 KB 👁 1 views

Measurement of the Angular distribution

Measurement of the Angular distribution for the 7Be(d, n)8B reaction and determination of the astrophysical S factor for the 7Be(p, γ)8B reaction

✍ Weiping Liu; Xixiang Bai; Shuhua Zhou; Zhanwen Ma; Zhichang Li; Youbao Wang; Anl 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 437 KB

The differential cross section for the 'Be(d, n)'B reaction at E,,=S.S MeV has been measured using a 'Be beam produced by the radioactive nuclear beam facility at the China Institute of Atomic Energy. The 8B ions were detected in full geometry with a two dimensional position sensitive AE-E counter t

Electronic structure and bonding in the

Electronic structure and bonding in the ground state of Cu2

✍ P. Scharf; S. Brode; R. Ahlrichs 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 304 KB

Extended basis set calculations have been performed for the ground state of 0.12 using CI(SD) and the coupled pair functional (CPF) method, a size-consistent moditication of CI(SD). Special emphasis is ,&en to the discussion of (lj Scis saturation effects (up to g functions were included). a) effect