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Facility (HRIBF) at Oak Ridge National Laboratory. Total absorption spectroscopy of fission products is important for the verification and development of nuclear structure models, as well as for the determination of decay heat released by radioactive nuclei during nuclear fuel cycle. The MTAS detector array consists of 19 NaI(Tl) hexagonal shape detectors, each one is 21 inches long and about 8 inches maximum diameter. MTAS is mounted on a movable cart allowing to adjust the height. The entire MTAS array is surrounded by over 12,000 pounds of lead and paraffin shielding. This heavy shielding consists of three individual movable segments. MTAS efficiency for full energy deposition of a single gamma ray approaches nearly 93% around 300 keV and it is about 68% for a 5 MeV gamma-transition. The energy resolution of individual MTAS modules is below 6% at 1.33 MeV and about 7% to 8% at 0.66 MeV. Auxiliary detectors include two segmented 1-mm-thick silicon strip detectors placed inside the MTAS array around the tape transporting collected activities. These Si-counters cover over 80% of the solid angle for beta-energy loss detection and help to center the radioactive samples inside MTAS. The energy resolution for 976 keV electrons is about 2.5% (∼25 keV) and the low energy threshold for electrons is less then 50 keV. The on-line MTAS commissioning run was performed in January 2012 at the mass separator on-line to the HRIBF Tandem accelerator. Over twenty decays of fission products have been studied using MTAS including seven decays defined as having the highest priority for decay heat analysis in nuclear reactor by the assessment of OECD Nuclear Energy Agency. Selected results will be presented at this meeting [1]. *This work was supported by the U.S. Department of Energy Office of Nuclear Physics. [1] M. Karny et al., “First results from the Modular Total Absorption Spectrometer at the HRIBF (ORNL, Oak Ridge),” ND2013 Proceedings. HF 3 4:20 PM Measurements of the (n, 2n) Reaction Cross Section of 181 Ta from 8 MeV to 14.5 MeV C. Bhatia, W. Tornow TUNL,Duke University,Durham, North Carolina 27708, USA M.E. Gooden TUNL, North Carolina State University, Raleigh, North Carolina 27695, USA A. Tonchev Lawrence Livermore National Laboratory, Livermore, California 94550, USA Nuclear data are the backbone of nuclear technology. They are useful in many areas such as design and modeling of nuclear energy systems,radiation safety, activation techniques, and interdisciplinary areas like production of radioisotopes for medical and industrial applications, space applications, radiation damage studies, environmental monitoring, etc. In addition, precise nuclear data, particularly cross-section measurements are playing an important role in fundamental research, to test different statistical-model codes and to provide insight into the reaction mechanisms in different energy regimes. 180 Ta is a subject of extensive study in nuclear physics. It is a natural isomeric target, and therefore of great interest for nuclear astrophysics as well. Furthermore, the 181 Ta(n, 2n) 180 Ta reaction was used as witness foils (chemical tracers) in underground tests of nuclear devices to assess their performance and very recently, also for diagnostic purposes at NIF (National Ignition Facility). The cross section of the reactions 181 Ta(n, 2n) 180 Ta was measured from 8 to 14.5 MeV in small energy steps to resolve inconsistencies in the existing database. For the first time the cross section of the (n, 2n) reaction on 181 Ta was measured for neutron energies near threshold. Mono-energetic neutron beams were produced via the 2 H(d, n) 3 He reaction, known for its high neutron yield in the energy region of the present measurements. The induced γ-ray activity of 180 Ta was measured with high-resolution HPGe detectors. The acquired γ-ray spectra, from the off-line measurements of the activated samples, were analyzed to identify the reaction products and to determine 132
the respective peak areas. The cross section was determined relative to Al and Au neutron activation monitor foils, measured in the same geometry. Results for the cross-section data obtained from 8 to 14.5 MeV are reported. Corresponding author: W. Tornow HF 4 4:40 PM Development of Anti-Compton LaBr3(Ce) Spectrometer for Measurement of Surrogate Reaction H. Makii, S. Ota, T. Ishii, K. Nishio, I. Nishinaka Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan K. Furutaka Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Ibaraki 319-1195, Japan Y. Wakabayashi RIKEN Nishina Center, Saitama 351-0198, Japan S. Chiba, M. Igashira Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Tokyo 152-8550, Japan Anti-Compton LaBr3(Ce) spectrometers have been installed at JAEA-Tokai tandem accelerator facility in order to measure the γ rays from the highly excited states produced by surrogate reactions. Each spectrometer consists of a central LaBr3(Ce) detector with a diameter of 10.2 cm and a length of 12.7 cm, and an annular BGO detector with a thickness of 2.5 cm and a length of 25.4 cm. In this contribution, we will present the results of performance test using the standard γ ray source and high-energy γ rays from the 27 Al(p,γ) 28 Si reaction, and a measurement plan for (n,γ) cross sections using a surrogate reaction at JAEA-Tokai tandem accelerator facility. HF 5 5:00 PM Development of an Ionization Chamber for the Spider Fission Fragment Detector K. Meierbachtol, F.K. Tovesson, C.W. Arnold, A.B. Laptev, T.A. Bredeweg, M. Jandel, R.O. Nelson, M.C. White Los Alamos National Laboratory, Los Alamos, NM 87545, USA The ionization chamber component of the SPIDER detector has been designed to measure energy loss and kinetic energy of fragments produced through neutron-induced fission with energy resolutions
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ND2013 2013 International Nuclear D
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Session BF Evaluated Nuclear Data L
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Session DD Nuclear Structure and De
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Hale, G. n+ 12 C Cross Sections fro
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Domula, A. New Nuclear Structure an
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Session KC Evaluated Nuclear Data L
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MacCormick, M. Survey and Evaluatio
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ments. Ivanova, T. Uncertainty Asse
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Arnold, C. Precision Velocity Measu
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19 Abridged Agenda Sunday March 4,
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21 Tuesday March 5, 2013 Time Met E
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23 Thursday March 7, 2013 Time Met
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Book of Abstracts Session AA ND2013
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multi-foil Parallel Plate Avalanche
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A Regional Coupled-channel Dispersi
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show the versatility of the code in
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[h] Table 1: Comparison of all the
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step was to determine which detecto
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In an effort to maintain the qualit
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Advances in Reactor Physics Linking
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sponsored the work presented in thi
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A revolutionary nuclear data system
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done in Ref. [1]. We demonstrate th
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CD 4 2:40 PM Development of a Syste
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with a central cavity where small s
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C. Arnold, E. Bond, T. Bredeweg, M.
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DA 3 4:20 PM Characterization and P
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detectors at the newly constructed
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Lead and lead-based alloys are - am
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of the setup. One option explored i
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DC 2 4:00 PM Improved Capture Gamma
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DC 5 5:00 PM Thermal Neutron Cross
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M.R. Gilbert, L.W. Packer, S. Lille
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Correlations Between Nuclear Charge
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Community’s 7th Framework Program
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we achieve very good separation of
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analysis of neutron leakage spectru
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a lower nuclear temperature than th
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Tungsten occurs naturally in five i
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for the combined use of integral ex
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Page 84 and 85: former case, more realistic covaria
Page 86 and 87: WInfried Zwermann, Kiril Velkov, An
Page 88 and 89: LA-UR-12-23712 The ENDF/B-VII.1 [1,
Page 90 and 91: comparison of results C/E of fissio
Page 92 and 93: Session GA Evaluated Nuclear Data L
Page 94 and 95: Session GC accelerator applications
Page 96 and 97: Session GD Antineutrinos Tuesday Ma
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Page 100 and 101: for extraction of very rare isotope
Page 102 and 103: and neutron multiplicity, informati
Page 104 and 105: as Monte Carlo simulations, and inc
Page 106 and 107: on its surface. The amplification t
Page 108 and 109: direction was recently used at n TO
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Page 112 and 113: Strontium-82 Production at ARRONAX
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Page 116 and 117: expected via an (n,γ) reaction. Pr
Page 118 and 119: Shinsuke Nakayama, Shouhei Araki, Y
Page 120 and 121: specific feature of the procedure e
Page 122 and 123: good timing characteristics.Example
Page 124 and 125: Materials and Measurements, Retiese
Page 126 and 127: derive reliable covariances from ta
Page 128 and 129: Concerns about the limits of worldw
Page 130 and 131: Accurate and reliable nuclear data
Page 134 and 135: CALIFA, a Calorimeter for the R3B/F
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Page 140 and 141: A significant breakthrough in our t
Page 142 and 143: and the neutron and proton emission
Page 144 and 145: horizontal plane, the measured posi
Page 146 and 147: The high precision of recent measur
Page 148 and 149: Session JF Neutron Cross Section Me
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Page 152 and 153: During more than four decades since
Page 154 and 155: KC 2 2:00 PM R-matrix Analysis for
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Page 158 and 159: importance in nuclear technology, a
Page 160 and 161: source SINQ (Swiss Spallation Neutr
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Page 164 and 165: J. P. Lestone, E. F. Shores Los Ala
Page 166 and 167: LA 5 5:00 PM Measurements relevant
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Page 176 and 177: LC 5 5:00 PM Uncertainty Study of N
Page 178 and 179: solving the quantum three-body prob
Page 180 and 181: Session LE Evaluated Nuclear Data L
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LE 5 5:00 PM Method of Best Represe
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for 89 fission products (representi
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Impact of the Energy Dependent DDXS
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from non 1/v behavior of nuclei. Mo
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evaluation (including covariances)
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system without isotope separation.
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NC 3 11:20 AM Propagation of Nuclea
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Results of the first complete compi
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Arjan Koning and Dimitri Rochman Nu
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calculating their mathematical mome
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The 33 S(n,α) cross section is of
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OA 2 2:00 PM Event-by-Event Fission
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available for ENDF/B-VII. The obser
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egions: the resolved resonances ran
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y the screening potential predicted
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[1] Y. Kojima et al., Nucl. Instr.
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y the emitted neutron. The Versatil
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enchmarking, the excitation functio
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PA 1 3:30 PM Investigation of Neutr
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as well as for a variety of Minor A
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Society, Vol. 59, No. 2, August 201
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A. Hermanne, R. Adam-Rebeles Cyclot
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We measured the isomeric yield rati
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the trends in the experimental data
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However, experiments often measure
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Statistical description of the gamm
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fragments formed are highly neutron
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F. Farget, J. Pancin GANIL, Caen, F
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ZPR-6/10 cores were applied as comp
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each nucleus in agreement with unce
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atios) is performed. In relation to
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school in science or engineering. I
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programs demanding only one compuls
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gamma-ray spectra will be theoretic
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RA 3 11:20 AM A Microscopic Theory
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Laboratory, Oak Ridge, Tenn., Novem
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Session RD Safeguards and Security
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Seeking Reproducibility in Fast Cri
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RE 4 11:40 AM Verification of Curre
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that a lot of them generally descri
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R. Hirschi, A. Hungerford, G. Magko
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- a density of levels too low for w
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the MONTEBURNS(1.0)-MCNP5-ORIGEN(2.
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The Nuclear Science References (NSR
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and applications using statistical
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Shielding objects are assembled fro
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The knowledge of neutron-induced re
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thus for the second time after the
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the global children health and cons
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Lawrence Livermore National Laborat
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The Russian Nuclear Data Library fo
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OECD Nuclear Energy Agency consider
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For experimental determination of t
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The European Activation SYstem has
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Neutron capture measurements of dys
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[1] H. Penttilä, P. Karvonen, T. E
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Measurement of Activation Cross Sec
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PR 66 Processing and Validation of
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law of the temperature ratio (RT =
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PR 74 Resonance Analysis of the 233
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Study of Various Potentials in Heav
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experimental data and for the produ
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fuel cycle impose tight requirement
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they do not satisfy (for example, b
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Differential Cross Sections for the
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extends the previous evaluation and
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various benchmark tests. The mainly
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PR 104 Evaluations for n+ 54,56,57,
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PR 109 Recent LAQGSM Developments a
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PR 113 Modelling of Spallation Sour
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Jagiellonian University, Reymonta 4
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PR 120 Coupled-Channel Models of Di
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PR 124 Nuclear Data Evaluation and
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physicist. - There is no perfect se
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Manturov, M.N. Nikolaev, A.M. Tsibo
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Vasiliev, W. Wieselquist and H. Fer
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Author Index 1, Vojtěch Rypar, PR
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HF 5, KD 4, LA 3, LA 6, LA 7, LA 8,
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Dunn, M. E., BF 4, RC 3 Dupont, Emm
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Gulliford, Jim, CE 1 Gunsing, Frank
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Kahl, David, HD 7 Kahler, A. C., CA
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Lehaut, G., PD 6 Leinweber, Greg, L
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Munkhsaikhan, J., HC 7 Mura, Luis F
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Prael, Richard E., PE 5 Praena, Jav
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Sheets, S., CF 2 Shen, Qingbiao, PC
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Typel, S., JA 3 Tyutyunnikov, S., L
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