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y the emitted neutron. The Versatile Array of Neutron Detectors at Low Energy (VANDLE) [1] was commissioned at the Holifield Radioactive Ion Beam Facility (HRIBF). The HRIBF used proton-induced fission of 238 U to produce intense and high isotopic purity beams of neutron-rich nuclei. Neutron energy spectra in key regions of the nuclear chart were measured near the shell closures at 78 Ni and 132 Sn, and for the deformed nuclei near 100 Rb. Many of the studied nuclei lie directly on proposed r-process paths. Of the almost thirty βn emitters studied, only a few relatively long-lived isotopes were previously investigated. For some of the most exotic nuclei, narrow and intense peaks in the neutron energy distribution indicate the presence of resonances, which are most likely signatures of the excitation of “core” states. In several cases, relatively high-energy neutrons are observed. Selected results will be presented. This research was sponsored in part by the National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Cooperative Agreement No. DE-FG52-08NA28552 [1] C. Matei et al., Proceedings of Science, NIC X, 138 (2008) OE 2 2:00 PM A New Approach to Estimating the Probability for β Delayed Neutron Emission E.A. McCutchan, A.A. Sonzogni, T.D. Johnson Brookhaven National Laboratory The probability for emitting a neutron following β decay, Pn, is critical in many areas of nuclear science from understanding nucleosynthesis during the r-process to control of reactor power levels and waste management. As the Pn value is an observable which is not trivial to measure or calculate, indirect empirical approaches have attempted to characterize measured Pn values based on the total Q value of the decay and the neutron separation energy, Sn, in the daughter nucleus and from these systematics provide estimates of Pn values in unexplored regions of the nuclear chart. A new approach to Pn systematics will be described which incorporates the half-life of the decay and the Q value for the β-delayed neutron emission. This prescription correlates the known data better and thus improves the estimation of Pn values for neutron-rich nuclei. Such an approach can be applied to generate input values for r-process network calculations or in the modeling of advanced fuel cycles. The possibility that these systematics can reveal information on the β-strength function to levels above the neutron separation energy will also be explored. Work supported by the DOE Office of Nuclear Physics under Contract No. DE-AC02-98CH10946. OE 3 2:20 PM Beta-delayed Neutron Spectroscopy with Trapped Ions N.D. Scielzo, R.M. Yee, S. Padgett, M. Pedretti, Lawrence Livermore National Laboratory. A. Czeszumska, E.B. Norman, University of California, Berkeley. P.F. Bertone, J.A. Clark, J.P. Greene, A.F. Levand, A. Perez Galvan, G. Savard, B.J. Zabransky, Argonne National Laboratory. S.A. Caldwell, M.G. Sternberg, J. Van Schelt, University of Chicago. D. Lascar, R.E. Segel, Northwestern University. K.S. Sharma, University of Manitoba. F. Buchinger, S. Gulick, G. Li, McGill University. C.M. Deibel, Louisiana State University. Neutrons emitted following the β decay of fission fragments play an important role in many fields of basic and applied science such as nuclear energy, nuclear astrophysics, and stockpile stewardship. However, the nuclear data available today for individual nuclei is limited for the vast majority of neutron emitters, the energy spectrum has not been measured and some recent measurements have uncovered discrepancies as large as factors of 2-4 in β-delayed neutron branching ratios. Radioactive ions held in an ion trap are 214
an appealing source of activity for improved studies of this β-delayed neutron emission process. When a radioactive ion decays in the trap, the recoiling daughter nucleus and emitted radiation emerges from the ∼ 1 mm 3 trap volume and propagates through vacuum with minimal scattering. For the first time, β-delayed neutron spectroscopy is being performed using trapped ions by identifying neutron emission from the large nuclear recoil it imparts and using this recoil energy to reconstruct the neutron branching ratios and energy spectra. Results from a recent proof-of-principle measurement of the β-delayed neutron spectrum of Iodine-137 will be presented and plans for future experiments using the intense fission fragment beams from the Californium Rare Isotope Breeder Upgrade (CARIBU) facility at Argonne National Laboratory will be discussed. This work was supported by U.S. DOE under Contracts DE-AC52-07NA27344 (LLNL), DE-AC02-06CH11357 (ANL), DE-FG02-98ER41086 (Northwestern U.), and NSERC, Canada, under Application No. 216974. OE 4 2:40 PM New Measurements in the Neutron Rich Region Around N=126 for β-decay and β-delayed Neutron Emission Data at GSI-FRS R. Caballero-Folch, Guillem Cortes UPC (Barcelona-Spain) C. Domingo-Pardo IFIC (Valencia-Spain) Neutron rich nuclei in the mass region around N=126 have scarce available information about their nuclear properties. Actually, theoretical calculations are difficult to validate on the basis of the few experimental information available so far. This contribution aims to present new data of half lives and β-delayed neutron emission around 214 Tl and 211 Hg regions, including isotopes observed for the first time, obtained from a recent experiment performed at the RIB facility of GSI-FRS (Germany). The detectors used in the experiment were an implantation and β detector based on a silicon array of highly segmented DSSD’s and an updated version of the BEta deLayEd Neutron detector (BELEN) developed at UPC (Barcelona), which consisted of 30 3 He-counters embedded in a polyethylene matrix. An advantage compared to previous similar experiments was due to an innovative self-triggered acquisition system, which allowed us to enhance the neutron detection probability when compared to conventional analogue acquisition systems. The analysis of the half lives and β delayed neutron emission probabilities will be presented as well as final results of these quantities. Session OF Cross Section Measurements Thursday March 7, 2013 Room: Central Park East at 1:30 PM OF 1 1:30 PM Nuclear Data Measurement Activities at CIAE Xichao Ruan, Weixiang Yu, Long Hou, Yi Yang China Institute of Atomic Energy, Beijing, China China Institute of Atomic Energy (CIAE) is one of the most important bases for nuclear data measurement in China. In this talk, the nuclear data measurement activities at CIAE in recent years will be presented. The secondary neutron emission DX and DDX measurement, the integral experiment for nuclear data 215
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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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in XUNDL and bibliographic informat
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former case, more realistic covaria
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WInfried Zwermann, Kiril Velkov, An
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LA-UR-12-23712 The ENDF/B-VII.1 [1,
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comparison of results C/E of fissio
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Session GA Evaluated Nuclear Data L
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Session GC accelerator applications
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Session GD Antineutrinos Tuesday Ma
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M. Fallot, S. Cormon, M.Estienne, V
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for extraction of very rare isotope
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and neutron multiplicity, informati
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as Monte Carlo simulations, and inc
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on its surface. The amplification t
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direction was recently used at n TO
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were chemically separated and the 2
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Strontium-82 Production at ARRONAX
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A. Guertin, C. Duchemin, F. Haddad,
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expected via an (n,γ) reaction. Pr
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Shinsuke Nakayama, Shouhei Araki, Y
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specific feature of the procedure e
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good timing characteristics.Example
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Materials and Measurements, Retiese
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derive reliable covariances from ta
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Concerns about the limits of worldw
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Accurate and reliable nuclear data
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Facility (HRIBF) at Oak Ridge Natio
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CALIFA, a Calorimeter for the R3B/F
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a modified Lorentzian model (MLO) o
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enchmark for existing atomic mass p
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A significant breakthrough in our t
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and the neutron and proton emission
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horizontal plane, the measured posi
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The high precision of recent measur
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Session JF Neutron Cross Section Me
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Alamos National Laboratory, Los Ala
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During more than four decades since
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KC 2 2:00 PM R-matrix Analysis for
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new covariance contributions to the
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importance in nuclear technology, a
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source SINQ (Swiss Spallation Neutr
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KF 2 2:00 PM MANTRA: An Integral Re
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 172 and 173: espectively, and identified approxi
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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
Page 182 and 183: LE 5 5:00 PM Method of Best Represe
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Page 186 and 187: Impact of the Energy Dependent DDXS
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Page 194 and 195: NC 3 11:20 AM Propagation of Nuclea
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Page 206 and 207: available for ENDF/B-VII. The obser
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Page 230 and 231: However, experiments often measure
Page 232 and 233: Statistical description of the gamm
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Page 236 and 237: F. Farget, J. Pancin GANIL, Caen, F
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Page 242 and 243: atios) is performed. In relation to
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Page 250 and 251: RA 3 11:20 AM A Microscopic Theory
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Page 254 and 255: Session RD Safeguards and Security
Page 256 and 257: Seeking Reproducibility in Fast Cri
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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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