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Unified Monte Carlo and Mixed Probability Functions
R. Capote,D. L. Smith 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The possibility of using the recently suggested Unified Monte Carlo (UMC) technique for the evaluation of nuclear reaction data other than those that are normally distributed is discussed in this paper. The alternative probability distributions examined here are: 1) lognormal distribution; 2) uniform interval distribution; and 3) exponential distribution. These distributions, together with the normal distribution, are capable of addressing most situations that are likely to be encountered in evaluating nuclear reaction data. The mathematical formalism is described and numerical examples are provided showing instances when the UMC method can lead to results which are quite different from those obtained using the Generalized Least Squares (GLS) method. We conclude that: 1) the GLS method gives reasonable results comparable to UMC for probability functions closely resembling symmetric normal distributions with small to modest uncertainties, but the UMC results are more reliable for broad or strongly asymmetric distributions; 2) the lognormal distribution can be used to good advantage in certain situations involving large uncertainties; 3) use of the uniform and exponential distributions by evaluators should be discouraged.
Sirakov, I.,Capote, R.,Gritzay, O.,Kim, H. I.,Kopecky, S.,Kos, B.,Paradela, C.,Pronyaev, V. G.,Schillebeeckx, P.,Trkov, A. Springer 2017 European Physical Journal A Vol.53 No.10
<P>Cross sections for neutron interactions with U-238 in the energy region from 5 keV to 150 keV have been evaluated. Average total and capture cross sections have been derived from a least squares analysis using experimental data reported in the literature. The resulting cross sections have been parameterised in terms of average resonance parameters maintaining full consistency with results of optical model calculations by using a dispersive coupled channel optical model potential. The average compound partial cross sections have been expressed in terms of transmission coefficients by applying the Hauser-Feshbach statistical reaction theory including width-fluctuations. A generalized single-level representation compatible with the energy-dependent options of the ENDF-6 format has been applied using standard boundary conditions. The results have been transferred into a full ENDF-6 compatible data file.</P>
A. Trkov,I. Kodeli,G. Zerovnik,R. Capote,D. W. Muir 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Taking the FNG-W benchmark with a D-T source in front of a large tungsten block as an example, the impact of the reaction cross-section covariance data on the predicted activities of monitor foils inside the block and the associated uncertainties were studied. Cross-material covariances between the isotopic cross sections of tungsten were obtained by including experimental measurements of the elemental total cross sections above the resonance range. Cross-material covariances of the elastic and the radiative capture reactions were considered. Since the original cross sections were evaluated accurately from the reasonably abundant isotopic data, the impact of introducing elemental data on the isotopic cross sections and their uncertainties were small. Correlations were observed mainly in the elastic channel, which has a relatively low sensitivity to the calculated monitor activities of the benchmark. Consequently, the impact on the predicted monitor sample activities was also small in terms of the absolute value and the uncertainty. The main achievement of the work was the demonstrated data consistency and the development of tools for including elemental data in isotopic cross section evaluation and the evaluation of cross-material covariances.
Fission Cross section Calculations of Actinides with EMPIRE Code
Mihaela Sin,Pavel Oblozinsky,Michal Herman,Roberto Capote 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Theoretical calculations of neutron induced reactions on ^(233,234,236)U, ^(237)Np, ^(238-242)Pu, ^(241,243)Am, ^(242-246)Cm carried out in the energy range 1 keV - 20 MeV with EMPIRE code are presented, with emphasis on the fission channel. Beside a consistent, accurate set of calculations, the paper contains arguments supporting the choice of the reaction models and input parameters. A special attention is paid to the fission model parameters and their uncertainties.
이정연,Efrem Sh. Soukhovitskii,김영덕,Roberto Capote,Satoshi Chiba,Jose M. Quesada 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
We have analyzed, within a unified approach, nuclear level structure, and nucleon interaction data of the even-even Sn isotopes - ^(116)Sn, ^(118)Sn, and ^(120)Sn - using the soft-rotator nuclear model and an appropriate coupled-channels optical model with a dispersive Lane-consistent optical potential. Determined best-fit optical model potential is capable of simultaneously describing all the experimental nucleon interaction data available up to 200 MeV - total neutron cross sections, proton reaction cross sections, nucleon elastic and inelastic scattering cross sections, and direct (p,n) charge exchange reaction cross sections.
Agrobacterium tumefaciens-mediated genetic transformation of Digitalis purpurea L.
Naivy Pe´rez-Alonso,Elio Jime´nez,Borys Chong-Pe´rez,Alina Capote,Anabel Pe´rez,Yovanny Izquierdo,Geert Angenon 한국식물생명공학회 2014 Plant biotechnology reports Vol.8 No.5
Genetic transformation is a tool of specialinterest for developing new biotechnological strategies forthe production of bio-active compounds such as cardenolides,which are exclusively obtained from plants. To date,Digitalis plants are the main economically viable source ofcardenolides for the pharmaceutical industry. This studydescribes the development of efficient plant regenerationand Agrobacterium-mediated genetic transformation protocolsfor Digitalis purpurea L. First, a plant regenerationprocedure starting from leaf segments of in vitro-cultivatedplants was established and the minimal inhibitory concentrationof G-418 (geneticin) for callus induction wasdetermined. Both leaf segments and callus tissue weresensitive to G-418 70 mg l-1. Afterwards, two Agrobacteriumstrains were used to test their T-DNA transferability on D. purpurea leaf tissues, EHA105 andC58C1RifR (pMP90), both harboring the binary vectorpTJK136. Strain C58C1RifR (pMP90) yielded a highernumber of transformed plants than EHA105. Successfultransformation was confirmed by histochemical b-glucuronidase(GUS) assays of the putative transgenic tissuesand PCR analyses using b-glucuronidase (uidA)- andneomycin phosphotransferase II (nptII)-specific primers. Southern blot hybridization confirmed the stable integrationof the nptII gene in the transgenic plants. In total, 518independent transgenic lines were regenerated with anaverage of 6.91 transgenic lines per initial leaf segmentinfected with A. tumefaciens strain C58C1RifR (pMP90). To date, only a few studies have been published on thegenetic transformation of Digitalis species. The protocolsfor plant regeneration and genetic transformation describedin this paper will contribute to functional studies for abetter understanding of cardenolide biosynthetic pathwaysand the metabolic engineering of cardenolides to develophigh-yielding improved genotypes.
Unilateral Punctate Keratitis Secondary to Wallenberg Syndrome
Pino Cidad,Ana Boto,Almudena Del Hierro,Maria Capote,Susana Noval,Amanda Garcia,Susana Santiago 대한안과학회 2014 Korean Journal of Ophthalmology Vol.28 No.3
We studied three patients who developed left unilateral punctate keratitis after suffering left-sidedWallenberg Syndrome. A complex evolution occurred in two of them. In all cases, neurophysiologicalstudies showed damage in the trigeminal sensory component at the bulbar level. Corneal involvementsecondary to Wallenberg syndrome is a rare cause of unilateral superficial punctate keratitis. The lossof corneal sensitivity caused by trigeminal neuropathy leads to epithelial erosions that are frequentlyunobserved by the patient, resulting in a high risk of corneal-ulcer development with the possibility ofsuperinfection. Neurophysiological studies can help to locate the anatomical level of damage at theophthalmic branch of the trigeminal nerve, confirming the suspected etiology of stroke, and demonstratingthat prior vascular involvement coincides with the location of trigeminal nerve damage. In some of thesepatients, oculofacial pain is a distinctive feature.
Renewed Database of GDR Parameters for Atomic Nuclei
V. A. Plujko,O. M. Gorbachenko,V. M. Bondar,R. Capote 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Updated values of giant dipole resonance parameters with uncertainties are presented which were obtained by a chi-square fit of the theoretical photoabsorption cross sections to the experimental data. Renewed systematics for giant dipole resonance parameters are given. Different Lorentzian-type models of dipole strength functions are tested by comparison of the calculations with experimental data. It is demonstrated that closed-form approaches with asymmetric shape of the gamma strength provide the most reliable simple method for estimation of the γ-decay.
Recommended nuclear data for medical radioisotope production: diagnostic positron emitters
Tá,rká,nyi, F. T.,Ignatyuk, A. V.,Hermanne, A.,Capote, R.,Carlson, B. V.,Engle, J. W.,Kellett, M. A.,Kibé,di, T.,Kim, G. N.,Kondev, F. G.,Hussain, M.,Lebeda, O.,Luca, A.,Nagai, Y.,Na Springer-Verlag 2019 Journal of Radioanalytical and Nuclear Chemistry Vol.319 No.2