β-Delayed Neutron Spectroscopy Using Trapped Radioactive Ions

被引：30

作者：

Yee, R. M. ^{[1
,2
]}

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

Bertone, P. F. ^{[3
]}

Buchinger, F. ^{[4
]}

Caldwell, S. ^{[3
,5
]}

Clark, J. A. ^{[3
]}

Deibel, C. M. ^{[3
,6
]}

Fallis, J. ^{[3
,7
]}

Greene, J. P. ^{[3
]}

Gulick, S. ^{[4
]}

Lascar, D. ^{[3
,8
]}

Levand, A. F. ^{[3
]}

Li, G. ^{[3
,4
]}

Norman, E. B. ^{[2
]}

Pedretti, M. ^{[1
]}

Savard, G. ^{[3
,5
]}

Segel, R. E. ^{[8
]}

Sharma, K. S. ^{[3
,7
]}

Sternberg, M. G. ^{[3
,5
]}

Van Schelt, J. ^{[3
,5
]}

Zabransky, B. J. ^{[3
]}

机构：

[1] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA

[2] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

[3] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[4] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[5] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[6] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA

[7] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

[8] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 09期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

R-PROCESS; DETECTION EFFICIENCY; MICROCHANNEL PLATES; ENERGY-SPECTRA; GAS CATCHERS; DECAY; NUCLEI; ABSOLUTE; FISSION; CONSEQUENCES;

D O I：

10.1103/PhysRevLett.110.092501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A novel technique for beta-delayed neutron spectroscopy has been demonstrated using trapped ions. The neutron-energy spectrum is reconstructed by measuring the time of flight of the nuclear recoil following neutron emission, thereby avoiding all the challenges associated with neutron detection, such as backgrounds from scattered neutrons and gamma rays and complicated detector-response functions. I-137(+) ions delivered from a Cf-252 source were confined in a linear Paul trap surrounded by radiation detectors, and the beta-delayed neutron-energy spectrum and branching ratio were determined by detecting the beta- and recoil ions in coincidence. Systematic effects were explored by determining the branching ratio three ways. Improvements to achieve higher detection efficiency, better energy resolution, and a lower neutronenergy threshold are proposed. DOI: 10.1103/PhysRevLett.110.092501

引用

页数：5

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