High-precision excited state lifetime measurements in rare earth nuclei using LaBr3(Ce) detectors

被引：4

作者：

Williams, E. ^{[1
]}

Cooper, N. ^{[1
]}

Bonett-Matiz, M. ^{[1
]}

Werner, V. ^{[1
]}

Regis, J. -M. ^{[2
]}

Rudigier, M. ^{[2
]}

Ahn, T. ^{[1
]}

Anagnostatou, V. ^{[1
,3
]}

Berant, Z. ^{[1
,4
]}

Bunce, M. ^{[1
,3
]}

Elvers, M. ^{[1
,2
]}

Heinz, A. ^{[1
]}

Ilie, G. ^{[1
]}

Jolie, J. ^{[2
]}

Radeck, D. ^{[1
,2
]}

Savran, D. ^{[1
,5
]}

Smith, M. ^{[1
]}

机构：

[1] Yale Univ, Wright Nucl Struct Lab, POB 208120, New Haven, CT 06520 USA

[2] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[3] Univ Surrey, Guildford GU2 7XH, Surrey, England

[4] Nucl Res Ctr Negev, IL-84190 Beer Sheva, Israel

[5] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

来源：

HEAVY ION ACCELERATOR SYMPOSIUM ON FUNDAMENTAL AND APPLIED SCIENCE 2012 | 2012年 / 35卷

关键词：

D O I：

10.1051/epjconf/20123506006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

To study how collective nuclear structure evolves towards mid-shell and test next-generation LaBr3(Ce) scintillation detectors, measurements of the lifetimes of 2(1)(+) states in Hf-168 and W-174 were conducted at the Wright Nuclear Structure Laboratory. Preliminary results indicate that the excellent time and energy resolution of LaBr3 detectors make them well suited to fast timing measurements, allowing for improved background subtraction and peak resolution in comparison to BaF2 detectors. Preliminary analysis shows an order of magnitude reduction in the statistical error of the 2(+) lifetimes in comparison to literature values for both nuclei. In the case of W-174, a substantial reduction of the observed lifetime hints at the possibility of new physics in the region.

引用

页数：4

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