Nuclear astrophysics studies by recoil mass separators.

Details Nuclear astrophysics studies by recoil mass separators. Nuclear astrophysics studies by recoil mass separators.

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997rmxf...43..169g&link_type=abstract

Revista Mexicana de Fisica, Vol. 43, No. 1, p. 169 - 177

Astronomy and Astrophysics

Astrophysics

Nuclear Reactions: Astrophysics

Scientific paper

It has been recently demonstrated that an accelerator mass spectrometry (AMS) system, used as a recoil separator in conjunction with a windowless gas target, can yield the high suppression factor needed to dispersively analyze radiative capture residues, with the aim of measuring cross sections in the sub-microbarn range. An experiment is underway utilizing a radioactive 7Be beam for the measurement of the cross section of the astrophysically important reaction 7Be(p, γ)8B at a center of mass energy ECM = 1 MeV. Preliminary results of this experiment are presented. The extension of the method to another reaction playing a key role in stellar evolution, i.e. 12C(α, γ)16O, requires an improvement of the angle- and momentum-acceptance of the recoil separator, the use of a jet gas target and of a specially designed low-threshold detector. The solutions proposed by a joint Italian-German project are discussed.

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