Zobrazeno 1 - 10
of 17
pro vyhledávání: '"A E, Schach von Wittenau"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 652:901-904
Given the cost and lead-times involved in high-energy proton radiography, it is prudent to model proposed radiographic experiments to see if the images predicted would return useful information. We recently modified our raytracing transmission radiog
Publikováno v:
Nuclear Technology. 168:245-248
MERCURY is a modern, parallel, general-purpose Monte Carlo code being developed at the Lawrence Livermore National Laboratory. Recently, a radiographic capability has been added. MERCURY can create...
Autor:
A E, Schach von Wittenau, L J, Cox, P M, Bergstrom, W P, Chandler, C L, Hartmann Siantar, R, Mohan
Publikováno v:
Medical Physics. 26:1196-1211
We present a method for condensing the photon energy and angular distributions obtained from Monte Carlo simulations of medical accelerators. This method represents the output as a series of correlated histograms and as such is well-suited for inclus
Autor:
D.A. Shirley, S. A. Kellar, X. S. Zhang, Zhengqing Huang, S. Kim, W.R.A. Huff, Zahid Hussain, Louis J. Terminello, Yuebing Zheng, X. J. Zhou, F. M. Tao, Edward Moler, A. E. Schach von Wittenau, H. Wu, Y. K. Pan, Yongsheng Chen, Z. Z. Yang
Publikováno v:
Physical Review B. 55:10830-10840
This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Chemical Sciences Division of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. It was performed at the Stanford Synchrotron Radiat
Publikováno v:
Catalysis Reviews. 39:49-76
The combination of turnover rate measurements and surface science techniques allows a firm quantification of rates in heterogeneous catalysis by metals. There are many examples of reactions where the turnover rates from different laboratories are the
Publikováno v:
Physical Review B. 47:13626-13635
Angle-resolved photoemission extended fine structure (ARPEFS) from the potassium 1s core level was measured for the quantitative structural determination of the p(2\ifmmode\times\else\texttimes\fi{}2)K/Ni(111) overlayer at 130 K. Our analysis of the
Autor:
Dennis W. Lindle, S. Zhang, D. A. Shirley, L.J. Medhurst, R. D. van Zee, S. H. Liu, A. E. Schach von Wittenau
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 52:671-675
Lately a variety of techniques have studied the electron correlation satellites with binding energies between the Argon 3s binding energy (29.24 eV) and the 2p/sup /minus/2/ ionization potential (43.38 eV). One of these techniques, Threshold Photoele
Autor:
Jeffrey B. Chandler, Harry E. Martz, D M Slone, Ernie Urquidez, Alexis E. Schach von Wittenau, Anne J. Sunwoo, Dennis M. Goodman, Jessie Jackson, Thaddeus J. Orzechowski, Gurcharn S. Dhillon, Gary E. Steinhour, Charles F. Cook, Martin R. de Haven, John D. Molitoris, Maurice B. Aufderheide
Publikováno v:
AIP Conference Proceedings.
The failure of a steel pipe subjected to shock loading was observed using x ray imaging. We describe and analyze the x ray images in detail. We see radiographic evidence that most of the fractures were due to shear rather than brittle failure. We als
Autor:
Jessie Jackson, Harry E. Martz, J Hall, D M Slone, Alexis E. Schach von Wittenau, Maurice B. Aufderheide, Clint M. Logan, Dennis M. Goodman
Publikováno v:
AIP Conference Proceedings.
We have developed a new tomography code, HADES-CCG. This code uses HADES, a radiographic simulation code, to perform forward- and back-projection and is coupled to a Constrained Conjugate Gradient (CCG) optimizer. An iterative solution to the reconst
Publikováno v:
AIP Conference Proceedings.
We describe features of the HADES radiographic simulation code. We begin with a discussion of why it is useful to simulate transmission radiography. The capabilities of HADES are described, followed by an application of HADES to a dynamic experiment