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Kajimoto, Tsuyoshi*; Shigyo, Nobuhiro*; Sanami, Toshiya*; Iwamoto, Yosuke; Hagiwara, Masayuki*; Lee, H. S.*; Soha, A.*; Ramberg, E.*; Coleman, R.*; Jensen, D.*; et al.
Nuclear Instruments and Methods in Physics Research B, 337, p.68 - 77, 2014/10
Times Cited Count：5 Percentile：37.93(Instruments & Instrumentation)The energy spectra of neutrons were measured by a time-of-flight method for 120 GeV protons on thick graphite, aluminum, copper, and tungsten targets with an NE213 scintillator at the Fermilab Test Beam Facility. Neutron energy spectra were obtained between 25 and 3000 MeV at emission angles of 30, 45, 120, and 150
. The spectra were parameterized as neutron emissions from three moving sources and then compared with theoretical spectra calculated by PHITS and FLUKA codes. The yields of the theoretical spectra were substantially underestimated compared with the yields of measured spectra. The integrated neutron yields from 25 to 3000 MeV calculated with PHITS code were 16-36% of the experimental yields and those calculated with FLUKA code were 26-57% of the experimental yields for all targets and emission angles.
Ni hole-states from (p,d) transfer reactionsSanetullaev, A.*; Tsang, M. B.*; Lynch, W. G.*; Lee, J.*; Bazin, D.*; Chan, K. P.*; Coupland, D.*; Hanzl, V.*; Hanzlova, D.*; Kilburn, M.*; et al.
Physics Letters B, 736, p.137 - 141, 2014/09
Times Cited Count：15 Percentile：69.65(Astronomy & Astrophysics)no abstracts in English
and 90 bombarded with 120-GeV protonsIwamoto, Yosuke; Sanami, Toshiya*; Kajimoto, Tsuyoshi*; Shigyo, Nobuhiro*; Hagiwara, Masayuki*; Lee, H. S.*; Soha, A.*; Ramberg, E.*; Coleman, R.*; Jensen, D.*; et al.
Progress in Nuclear Science and Technology (Internet), 3, p.65 - 68, 2012/10
Neutron energy spectra at 15 and 90 produced from carbon, aluminum, copper and tungsten targets bombarded with 120-GeV protons were measured at Fermilab Test Beam Facility (FTBF) for the validation of simulation codes. The target thicknesses were 60 cm for graphite, 50 cm for aluminum, 20, 40, and 60 cm for copper and 10 cm for tungsten, respectively. The neutron time-of-flight measurements were performed using an NE213 organic liquid scintillator at 5.2 m for 90 and 8.0 m for 15 measuring from the center of the target to the surface of the detector. The raw signals (waveforms) obtained from photomultiplier tubes were recorded using the 10 bit digitizer (Agilent-acqiris DC282) with 0.5 ns sampling and 500 ns duration. To compare the experimental results, Monte Carlo calculations with the PHITS, MARS and FLUKA codes were performed. It was found that these calculated results underestimate the experimental results in the whole energy range.
OsShizuma, Toshiyuki; Mitarai, Shiro*; Sletten, G.*; Bark, R. A.*; Gjorup, N. L.*; Jensen, H. J.*; Piiparinen, M.*; Wrzesinski, J.*; Shimizu, Yoshifumi*
Physical Review C, 69(2), p.024305_1 - 024305_18, 2004/02
Times Cited Count：15 Percentile：65.29(Physics, Nuclear)High-spin states in Os have been studied using the 
Yb(
C,4n) reaction at a beam energy of 65MeV. Previously known 1-quasiparticle bands have been extended to higher spins. New high-
bands based on 3- and 5-quasiparticle excitation have been identified. Nilsson configurations are assigned based on the g-factors deduced from M1/E2 branching ratios within the bands. In addition, a new isomer at 5008keV has been found with a half-life of 18(2) ns. The hindrance in decays of the high- intrinsic states are discussed in terms of the 
tunneling model where the low- and high- states interact through the triaxial shape fluctuation.
Jensen, R.; Hide, Sakaguchi,*
2004 AGU Fall Meeting Abstract MR11A-0929, 0 Pages, 2004/00
Dependent upon the microstructure of a rock, different mechanical behavior and failure mechanisms have been noted in stress-induced borehole breakouts. Relatively recently, Haimson has identified a somewhat counter-intuitive material response for high-porosity rocks such as Berea Sandstone. Long, slot-like fractures emanating from the borehole, perpendicular to the maximum principal stress, were observed in laboratory samples that had been subject to far-field stresses while undergoing drilling. It has been proposed that that the failure mechanism for this phenomenon is compaction band formation in front of the crack-tip and is dependent upon the grain bonding characteristics. This paper discusses the numerical simulation of borehole breakouts in high porosity sandstones using the 3-D discrete element method (DEM) code, OpenDEM. DEM models use discrete particles that interact only with neighboring particles. Therefore, there is great advantage to using a DEM code for this type of analysis where there is dis-aggregation of material in the region of interest. This advantage stems from the formulation of assumptions inherent to DEM that are more closely aligned to the micro-structural behavior of the rock. The numerical model uses a bonded particle model where the rock is represented as a collection of randomly sized spherical particles that are densely packed and bonded together at the particle contact points. The drilling action is modeled by incrementally removing particles in the region of the borehole. Drilling fluid is not modeled. Therefore, in order to account for the flushing action of the drill fluid that carry the de-bonded sand particles from the fracture, as the DEM particles break free from the simulation matrix, they are removed from the simulation. Simulation results will be presented showing qualitative representation of the borehole breakouts.
Boyack, B. E.*; Motta, A. T.*; Peddicord, K. L.*; Alexander, C. A.*; Andersen, J. G. M.*; Blaisdell, J. A.*; Dunn, B. M.*; Ebeling-Koning, D.*; Fuketa, Toyoshi; Hache, G.*; et al.
NUREG/CR-6744, 455 Pages, 2001/12
no abstracts in English
