http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
J. L. Ullmann,A. J. Couture,A. L. Keksis,D. J. Vieira,,J. M. ODonnell,J. M. Wouters,M. Jandel,R. C. Haight,R. S. Rundberg,T. A. Bredeweg,T. Kawano,C. Y. Wu,J. A. Becker,A. Chyzh,B. Baramsai,G. E. Mitc 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
A careful new measurement of the ^(238)U(n,γ) cross section from 10 eV to 100 keV has been made using the DANCE detector at LANSCE. DANCE is a 4π calorimetric scintillator array consisting of 160 BaF^2 crystals. Measurements were made on a 48 mg/cm^2 depleted uranium target. The cross sections are in general in good agreement with previous measurements. The gamma-ray emission spectra, as a function of gamma multiplicity, were also measured and compared to model calculations.
Applications of the Hauser-Feshbach Theory to Advanced Nuclear Sciences
T. Kawano,P. Talou,M. B. Chadwick,S. Holloway,P. Moller,T. Watanabe 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Unique applications of the Hauser-Feshbach (HF) statistical theory in the nuclear science field, as well as the HF model code development at LANL are discussed. Our applied field in which HF is applicable is not necessarily limited to the particle-induced reactions. We combine the HF model with a theory of β-decay to calculate the β-delayed neutron and γ-ray emissions. These calculations can be performed for each β-decay precursor to estimate aggregate neutron and γ-ray energy release at fission. Another relatively new example at LANL is the ability to compute HF predictions with a Monte Carlo technique (MCHF), which gives all the correlated information.
Recent Advances in Nuclear Fission Theory: Pre- and Post-Scission Physics
P. Talou,T. Kawano,J. E. Lynn,P. Moller,O. Bouland,M. B. Chadwick 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Recent advances in the modeling of the nuclear fission process for data evaluation purposes are reviewed. In particular, it is stressed that a more comprehensive approach to fission data is needed if predictive capability is to be achieved. The link between pre- and post-scission data is clarified and a path forward to evaluate those data in a consistent and comprehensive manner is presented. Two examples are given: (i) the modeling of fission cross-sections in the R-matrix formalism, for which results for Pu isotopes from A = 239 to 242 are presented; (ii) the modeling of prompt fissionneutrons in the Monte Carlo Hauser-Feshbach framework. Results for neutron-induced fission on ^(235)U are discussed.
Time Dependent Particle Emission From Fission Products
S. T. Holloway,Toshihiko Kawano,Peter Moller 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Decay heating following nuclear fission is an important factor in the design of nuclear facilities; impacting a variety of aspects ranging from cooling requirements to shielding design. Calculations of decay heat, often assumed to be a simple product of activity and average decay product energy, are complicated by the so called ``pandemonium effect.'' Elucidated in the 1970?셲 this complication arises from beta-decays feeding high-energy nuclear levels; redistributing the available energy between betas and gammas. Increased interest in improving the theoretical predictions of decay probabilities has been, in part, motivated by the recent experimental effort utilizing the Total Absorption Gamma-ray Spectrometer (TAGS) to determine individual beta-decay transition probabilities to individual nuclear levels. Accurate predictions of decay heating require a detailed understanding of these transition probabilities, accurate representation of particle decays as well as reliable predictions of temporal inventories from fissioning systems. We will discuss a recent LANL effort to provide a time dependent study of particle emission from fission products through a combination of Quasiparticle Random Phase Approximation (QRPA) predictions of beta-decay probabilities, statistical Hauser-Feshbach techniques to obtain particle and gamma-ray emissions in statistical Hauser-Feshbach and the nuclear inventory code, CINDER.
Walwyn, Robert J.,Chan, Bun,Usov, Pavel M.,Solomon, Marcello B.,Duyker, Samuel G.,Koo, Jin Young,Kawano, Masaki,Turner, Peter,Kepert, Cameron J.,D'Alessandro, Deanna M. The Royal Society of Chemistry 2018 Journal of materials chemistry. C, Materials for o Vol.6 No.5
<P>This paper reports additional properties of the electron donor molecule triselenathiafulvalene (TSTF) and its synthesis <I>via</I> a new route involving the precursor tetracarbomethoxytriselenathiafulvalene (TCMTSTF). The structural, electronic and computational properties of TSTF are fully profiled, and discussed in the context of the closely related archetypal electron donor molecule tetrathiafulvalene (TTF). TSTF was also incorporated into a charge transfer (CT) complex with the well-known electron acceptor 7,7,8,8-tetracyanoquinodimethane (TCNQ), to generate TSTF-TCNQ. In order to establish its position in the greater TXF-TCNQ series (where TXF = a tetrachalcogenafulvalene), spectral, electrochemical, magnetic, conductivity and computational studies were performed on TSTF and TSTF-TCNQ to extend what is known about the highly interesting and useful new donor molecule.</P>