Computer Science – Performance
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547610s&link_type=abstract
American Astronomical Society, AAS Meeting #215, #476.10; Bulletin of the American Astronomical Society, Vol. 42, p.525
Computer Science
Performance
Scientific paper
The Versatile Array of Neutron Detectors at Low Energy (VANDLE) is being developed to study the properties of unstable atomic nuclei via (d,n) reactions and beta delayed neutron emission. The (d,n) reactions, on unstable nuclei such as 56Ni, are of great interest in understanding the synthesis of heavy proton-rich nuclei in X-ray bursts and Supernova explosions. This doubly-magic nucleus is thought to be an important link in the production of heavy elements and a waiting point in the rp-process, which typically occurs in these explosive environments. The VANDLE array will be comprised of individual scintillator bars of two set lengths: 2 m and 60 cm, coupled to photomultiplier tubes (PMTs). It will allow us to study the 2H(56Ni,n)57Cu reaction cross section, and allow us to calculate the reaction rate for the 56Ni(p,γ)57Cu reaction. The prototypes for these bars are undergoing testing. The attenuation length of the scintillator bar plays a direct role in the detector efficiency, while the position and timing calibrations help pinpoint where an event occurred in the bar. By using different configurations and sources, it was possible to measure the attenuation length and the position and timing resolutions. Experiments have also been performed pertaining to the materials used in coupling the scintillator to the PMT. All these tests will help optimize the performance of the detectors. The experimental results for the prototype detectors will be presented.
This work was supported in part by the U.S. Department of Energy and National Science Foundation.
Blackmon Jeff C.
Cizewski Jolie A.
Matei Catalin
Peters William A.
Spassova Irena
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