Scintillation time dependence and pulse shape discrimination in liquid argon

被引：111

作者：

Lippincott, W. H. ^{[1
]}

Coakley, K. J. ^{[2
]}

Gastler, D. ^{[3
]}

Hime, A. ^{[4
]}

Kearns, E. ^{[3
]}

McKinsey, D. N. ^{[1
]}

Nikkel, J. A. ^{[1
]}

Stonehill, L. C. ^{[4
]}

机构：

[1] Yale Univ, Dept Phys, New Haven, CT 06511 USA

[2] Natl Inst Stand & Technol, Boulder, CO 80305 USA

[3] Boston Univ, Dept Phys, Boston, MA 02215 USA

[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW C | 2008年 / 78卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.78.035801

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Using a single-phase liquid argon detector with a signal yield of 4.85 photoelectrons per keV of electronic-equivalent recoil energy (keVee), we measure the scintillation time dependence of both electronic and nuclear recoils in liquid argon down to 5 keVee. We develop two methods of pulse shape discrimination to distinguish between electronic and nuclear recoils. Using one of these methods, we measure a background-and statistics-limited level of electronic recoil contamination to be 7.6 x 10(-7) between 52 and 110 keV of nuclear recoil energy (keVr) for a nuclear recoil acceptance of 50% with no nuclear recoil-like events above 62 keVr. Finally, we develop a maximum likelihood method of pulse shape discrimination based on the measured scintillation time dependence.

引用

页数：12

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