4π Neutron detection with low-intensity radioactive beams

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• 作者：A. Del Zoppo ; P. Figuera ; A. Musumarra ; N. Colonna ; R. Alba ; C. Bonomo ; S. Cherubini ; L. Cosentino ; A. Di Pietro ; M. Gulino ; M. La Cognata ; L. Lamia ; M.G. Pellegriti ; R.G. Pizzone ; C. Rolfs ; S. Romano
• 关键词：Thermalization detectors ; Radioactive ion beams ; Big-Bang nucleosynthesis
• 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
• 出版年：2007
• 期刊代码：41_01689002
• 类别：ph
• 出版时间：1 November 2007
• 卷：581
• 期：3
• 页码：783-790
• 文件大小：2679 K

摘要

The feasibility of inclusive neutron production measurements in reactions induced by low-intensity radioactive beams using a 4π thermalization counter is studied. The time response of the detector is investigated experimentally by a technique that results in an enhanced sensitivity to weak components with long capture times. Complementary Monte Carlo simulations are presented. The capture time response is found to be independent on the neutron energy above 0.1 MeV. The capability of the capture time information in the unambiguous identification of neutron signals correlated to the projectile arrival on the target even in the presence of an intense background contamination is shown. As an application case, the ⁸Li(⁴He,n)¹¹B reaction at the Big-Bang temperature is commented.