E. Shields
Princeton University
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Publication
Featured researches published by E. Shields.
Physical Review C | 2015
J. Xu; E. Shields; Frank Calaprice; S. Westerdale; Francis Froborg; Burkhant Suerfu; Thomas Alexander; A. Aprahamian; Henning O. Back; C. Casarella; X. Fang; Yogesh K. Gupta; Aldo Ianni; Edward Lamere; W. Hugh Lippincott; Q. Liu; S. Lyons; K. Siegl; Mallory Smith; Wanpeng Tan; Bryant Vande Kolk
The dark matter interpretation of the DAMA modulation signal depends on the NaI(Tl) scintillation efficiency of nuclear recoils. Previous measurements for Na recoils have large discrepancies, especially in the DAMA/LIBRA modulation energy region. We report a quenching effect measurement of Na recoils in NaI(Tl) from 3keV
Astroparticle Physics | 2016
S. Westerdale; E. Shields; Frank Calaprice
_{\text{nr}}
LOW RADIOACTIVITY TECHNIQUES 2015 (LRT 2015): Proceedings of the 5th International Workshop in Low Radioactivity Techniques | 2015
J. Xu; Frank Calaprice; Francis Froborg; E. Shields; Burkhant Suerfu
to 52keV
Journal of Instrumentation | 2017
S. Westerdale; J. Xu; E. Shields; Francis Froborg; Frank Calaprice; Thomas Alexander; A. Aprahamian; Henning O. Back; C. Casarella; X. Fang; Yogesh K. Gupta; Edward Lamere; Q. Liu; S. Lyons; Mallory Smith; W. P. Tan
_{\text{nr}}
Archive | 2015
J. Xu; E. Shields; Frank Calaprice; S. Westerdale; Francis Froborg; Thomas Alexander; A. Aprahamian; Henning O. Back; C. Casarella; Yogesh K. Gupta; Aldo Ianni; Edward Lamere; W. Hugh Lippincott; Q. Liu; S. Lyons; K. Siegl; Mallory Smith; W. Tan; Bryant Vande Kolk
, covering the whole DAMA/LIBRA energy region for light WIMP interpretations. By using a low-energy, pulsed neutron beam, a double time-of-flight technique, and pulse-shape discrimination methods, we obtained the most accurate measurement of this kind for NaI(Tl) to date. The results differ significantly from the DAMA reported values at low energies, but fall between the other previous measurements. We present the implications of the new quenching results for the dark matter interpretation of the DAMA modulation signal.
Bulletin of the American Physical Society | 2013
S. Westerdale; E. Shields; J. Xu; Frank Calaprice
Abstract Neutrons are a particularly dangerous background for direct WIMP dark matter searches; their nuclear recoils with the target nuclei are often indistinguishable from nuclear recoils produced by WIMP-nuclear collisions. In this study, we explore the concept of a liquid scintillator neutron veto detector that would allow direct dark matter detectors to potentially reject neutrons with greater than 99% efficiency. Here we outline the construction and testing of a small prototype detector and the potential implications of this technology for future dark matter detectors.
Bulletin of the American Physical Society | 2012
S. Westerdale; E. Shields
The dark matter claim by DAMA is both significant and controversial. Several experiments have claimed to rule out DAMA/LIBRA, but the comparisons are made based on dark matter halo and dark matter-interaction models that are currently unknown. Therefore, an unambiguous test of DAMA/LIBRA is best made using NaI(Tl) crystals with lower residual background than that of DAMA/LIBRA, and the SABRE experiment is designed to achieve this goal. In this paper we will discuss the development of high-purity SABRE NaI(Tl) crystals and detectors, and progress of the SABRE experiment toward testing DAMA/LIBRA.
