Beta-Delayed Neutron Studies of Fission Fragments Using VANDLE

被引：0

作者：

Paulauskas, S. V. ^{[1
]}

Madurga, M. ^{[1
]}

Grzywacz, R. ^{[1
]}

Go, S. ^{[1
]}

Keeler, A. ^{[1
]}

King, T. T. ^{[1
]}

Taylor, S. Z. ^{[1
]}

Zachary, C. J. ^{[2
]}

机构：

[1] Univ Tennessee Knoxville, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

来源：

FISSION AND PROPERTIES OF NEUTRON-RICH NUCLEI | 2018年

关键词：

Plastic Scintillators; Digitizers; Time-of-Flight; Timing; LOW-ENERGY VANDLE; VERSATILE ARRAY; ESSENTIAL DECAY; LARGE-AREA; DETECTOR; SPECTROSCOPY; PANDEMONIUM;

D O I：

暂无

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：

Beta-delayed neutrons emitted from the decay of fission fragments play an important role in the r-process and nuclear reactor physics. Neutron energy spectra provide information necessary to accurately reconstruct a level scheme that reflects nuclear structure. Decay cascades where neutron emission populate excited states in the (N-1) daughter complicate level scheme construction. These excited states in the (N-1) daughter often emit gamma-rays. These situations necessitate measurement of three-fold coincidence between the beta, neutron and gamma-ray. However, there is a scarcity of measurements providing these data. To address this need, we designed the Versatile Array of Neutron Detectors at Low Energy (VANDLE)(1), which measures neutron energies via the time-of-flight technique. VANDLE is instrumented with a digital data acquisition system. The digital system provides a neutron detection threshold as low as 70 keV and time resolutions better than 1 ns. A high-efficiency gamma ray detection system enables complete calorimetry of the decay by detecting gamma-rays that follow neutron emission. High purity Ge clovers present isotope identification, but suffer from poor geometric efficiency. A high efficiency array of NaI and LaBr3 detectors boost neutron -gamma coincidences.

引用

页码：295 / 302

页数：8

共 15 条

[1] A LARGE AREA DETECTOR FOR HIGH-ENERGY NEUTRONS [J].

BLAICH, T ;

ELZE, TW ;

EMLING, H ;

FREIESLEBEN, H ;

GRIMM, K ;

HENNING, W ;

HOLZMANN, R ;

ICKERT, G ;

KELLER, JG ;

KLINGLER, H ;

KNEISSL, W ;

KONIG, R ;

KULESSA, R ;

KRATZ, JV ;

LAMBRECHT, D ;

LANGE, JS ;

LEIFELS, Y ;

LUBKIEWICZ, E ;

PROFT, M ;

PROKOPOWICZ, W ;

SCHUTTER, C ;

SCHMIDT, R ;

SPIES, H ;

STELZER, K ;

STROTH, J ;

WALUS, W ;

WAJDA, E ;

WOLLERSHEIM, HJ ;

ZINSER, M ;

ZUDE, E .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1992, 314 (01) :136-154

[2]

Brady M.C., 1989, THESIS

[3] TONNERRE: An array for delayed-neutron decay spectroscopy [J].

Buţa, A. ;

Martin, T. ;

Timiş, C. ;

Achouri, N. ;

Angélique, J.C. ;

Borcea, C. ;

Cruceru, I. ;

Genoux-Lubain, A. ;

Grévy, S. ;

Lewitowicz, M. ;

Liénard, E. ;

Marqués, F.M. ;

Negoiţa, F. ;

De Oliveira, F. ;

Orr, N.A. ;

Péter, J. ;

Sandu, M. .

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000, 455 (02) :412-423

[4] ESSENTIAL DECAY OF PANDEMONIUM - BETA-DELAYED NEUTRONS [J].

HARDY, JC ;

JONSON, B ;

HANSEN, PG .

NUCLEAR PHYSICS A, 1978, 305 (01) :15-28

[5] ESSENTIAL DECAY OF PANDEMONIUM - DEMONSTRATION OF ERRORS IN COMPLEX BETA-DECAY SCHEMES [J].

HARDY, JC ;

CARRAZ, LC ;

JONSON, B ;

HANSEN, PG .

PHYSICS LETTERS B, 1977, 71 (02) :307-310

[6] INVESTIGATION OF BETA STRENGTH FUNCTIONS BY NEUTRON AND GAMMA-RAY SPECTROSCOPY .1. DECAY OF BR-'7, I-137, AS-85 AND SB-135 [J].

KRATZ, KL ;

RUDOLPH, W ;

OHM, H ;

FRANZ, H ;

ZENDEL, M ;

HERRMANN, G ;

PRUSSIN, SG ;

NUH, FM ;

SHIHABELDIN, AA ;

SLAUGHTER, DR ;

HALVERSON, W ;

KLAPDOR, HV .

NUCLEAR PHYSICS A, 1979, 317 (2-3) :335-362

[7] MoNA - The Modular Neutron Array [J].

Luther, B ;

Baumann, T ;

Thoennessen, M ;

Brown, J ;

DeYoung, P ;

Finck, J ;

Hinnefeld, J ;

Howes, R ;

Kemper, K ;

Pancella, P ;

Peaslee, G ;

Rogers, W ;

Tabor, S .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 505 (1-2) :33-35

[8] Evidence for Gamow-Teller Decay of 78Ni Core from Beta-Delayed Neutron Emission Studies [J].

Madurga, M. ;

Paulauskas, S. V. ;

Grzywacz, R. ;

Miller, D. ;

Bardayan, D. W. ;

Batchelder, J. C. ;

Brewer, N. T. ;

Cizewski, J. A. ;

Fijalkowska, A. ;

Gross, C. J. ;

Howard, M. E. ;

Ilyushkin, S. V. ;

Manning, B. ;

Matos, M. ;

Mendez, A. J., II ;

Miernik, K. ;

Padgett, S. W. ;

Peters, W. A. ;

Rasco, B. C. ;

Ratkiewicz, A. ;

Rykaczewski, K. P. ;

Stracener, D. W. ;

Wang, E. H. ;

Wolinska-Cichocka, M. ;

Zganjar, E. F. .

PHYSICAL REVIEW LETTERS, 2016, 117 (09)

[9] A digital data acquisition framework for the Versatile Array of Neutron Detectors at Low Energy (VANDLE) [J].

Paulauskas, S. V. ;

Madurga, M. ;

Grzywacz, R. ;

Miller, D. ;

Padgett, S. ;

Tan, H. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2014, 737 :22-28

[10] LENDA: A low energy neutron detector array for experiments with radioactive beams in inverse kinematics [J].

Perdikakis, G. ;

Sasano, M. ;

Austin, Sam M. ;

Bazin, D. ;

Caesar, C. ;

Cannon, S. ;

Deaven, J. M. ;

Doster, H. J. ;

Guess, C. J. ;

Hitt, G. W. ;

Marks, J. ;

Meharchand, R. ;

Nguyen, D. T. ;

Peterman, D. ;

Prinke, A. ;

Scott, M. ;

Shimbara, Y. ;

Thorne, K. ;

Valdez, L. ;

Zegers, R. G. T. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2012, 686 :117-124

← 1 2 →