Preliminary measurements with DRAGON on resonances in the ^21Na(p,γ)^22Mg reaction.

Details Preliminary measurements with DRAGON on resonances in the ^21Na(p,γ)^22Mg reaction. Preliminary measurements with DRAGON on resonances in the ^21Na(p,γ)^22Mg reaction.

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.x7011d&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

The new DRAGON recoil separator facility, designed and built to measure directly the rates of radiative proton and alpha capture reactions important for nuclear astrophysics is now operational at the TRIUMF-ISAC radioactive beams facility in Vancouver, Canada. Experiments have been conducted on the ^21Na(p,γ)^22Mg reaction using a radioactive ^21Na beam with an intensity of up to 5 x 10^8 /s incident onto a windowless hydrogen gas target ( 4 x 10^18 H atoms/cm^2). Prompt reaction gammas were detected using a BGO array and separated reaction products detected using a silicon strip detector at the end of the 20 m recoil mass separator. Yield measurements (recording singles and coincident signals simultaneously) were performed by scanning in energy over the known resonance reported previously in ^22Mg at Ecm = 212 keV, and in addition, over a strong resonance observed at Ecm ≈822 keV. Known resonances in the ^21Ne(p,γ)^22Na reaction were used to calibrate the DRAGON. Studies are in progress to further define the performance of the DRAGON facility. Results of data analysis and system performance studies will be presented.

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