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AN ADVANCED ENGINEERING TEST REACTOR

Description: A concpept for an advanced enineering test reactor is described. Thpe results of various investigations with regard to alternative design possibilitipes are presented. Retailed information is given rearding the nuclear and enineering calculations. (W.D.M.)
Date: March 15, 1958
Creator: Leyse, C.F.; Bertelson, P.C.; Chmielewski, W.S.; Delicate, W.S.; Francis, T.L.; Kornfeld, M.J. et al.
Partner: UNT Libraries Government Documents Department

DESCRIPTION OF PRINTED OUTPUT FROM INTRANUCLEAR CASCADE CALCULATION

Description: ABS>A detailed description of the printed output sheets from the intranuclear cascade calculation described in ORNL3383 is given. The three analysis codes --analysis codes I and II and an evaporation code --that were written to organize the raw data of the output tape are considered. (auth) A tabulation of the neutron total cross section of U/sup 233/ as a function of neutron energy from 0.07 to 10,000 ev, measured with the ORNL fast chopper time- of-flight neutron spectrometer is given. (auth)
Date: May 28, 1963
Creator: Bertini, H.W.
Partner: UNT Libraries Government Documents Department

SOME SIMPLIFIED EXPRESSIONS FOR THE 3-j SYMBOLS

Description: A general formalism is developed for obtaining simplified expressions for the 3-j symbol using the symmetry properties of the symbol discovered by Regge. Some new formulas are derived from the formalism for cases in which Racah's series for the symbol is summable. (auth)
Date: March 15, 1963
Creator: Zerby, C.D. & Coveyou, R.R.
Partner: UNT Libraries Government Documents Department

An Application of Spencer's Method to the Stieltjes and Hamburger Moment Problems

Description: Given the moments of a function it is often desirable to obtain a numerical approximation of the function. A method for estimating the solutions of the Stieltjes and Hamburger moment problems is developed. Calculations indicate that the method is both feasible and accurate. (auth)
Date: July 1, 1959
Creator: Guilinger, W. H.
Partner: UNT Libraries Government Documents Department

Construction of an Extended Nuclidic Mass Table

Description: A parabolic systematics approach was used to construct an extended mass table with very small deviations between the calculated and known masses. The masses were obtained from a formula parabolic in 2 after inclusion of the necessary considerations. For 763 masses, the standard deviation was 0.35 Mev, and the largest deviation was 2 Mev. (D.C.W.)
Date: July 1, 1963
Creator: Hillman, M.
Partner: UNT Libraries Government Documents Department

SPECIFIC ACTIVITIES OF NUCLIDES, Z /greater than/ 87

Description: The specific activity of an isotope is expressed as the product of its decay constant and the number of atoms per unit weight. The specific activities of the elements with Z> 87 are calculated in units of disintegrations per minute per microgram. (W.D.M.)
Date: September 1, 1959
Creator: Isaac, N.M. & Wilkins, J.W.
Partner: UNT Libraries Government Documents Department

Variable Metric Method for Minimization

Description: A method for determining numerically local minima of differentiable functions of several variables is presented. In the process of locating each minimum, a matrix which characterizes the behavior of the iunction about the minimum is determined. For a region in which the function depends quadratically on the variables, no more than N iterations are required, where N is the number of variables. By suitable choice of starting values and without modification of the procedure, linear constraints can be imposed upon the variables. (auth)
Date: November 1, 1959
Creator: Davidon, W. C.
Partner: UNT Libraries Government Documents Department

Variable Metric Method for Minimization

Description: A method is presented for numerically determining local minima of differentiable functions of several variables. In the proeess of locating each minimum, a matrix is determined which characterizes the behavior of the function about the minimum. For a region in which thc function depends quadratically on the variables, no more than N iterations are required, where N is the number of variables. By suitable choice of starting values and without modification of the procedure, linear constraints can be imposed upon the variables. (auth)
Date: May 1, 1959
Creator: Davidon, W. C.
Partner: UNT Libraries Government Documents Department

NUMERICAL SOLUTION OF TRANSIENT AND STEADY-STATE NEUTRON TRANSPORT PROBLEMS

Description: A general numerical procedure, called the discrete S/sub n/ method, for solving the neutron transport equation is described. The main topics relate to the derivation of suitable difference equations, and to the problem of solving these, while maintaining generality, accuracy, and reasonable computing speed. A few comparisons with other methods are made. (auth)
Date: May 16, 1959
Creator: Carlson, B.
Partner: UNT Libraries Government Documents Department

CLIP 1--AN IBM-704 PROGRAM TO SOLVE THE P-3 EQUATIONS IN CYLINDRICAL GEOMETRY

Description: A second order form of the cylindrical P-3 equations is obtained for the case of an isotropic source. The boundary conditions and numerical method are discussed. Input preparation and operating instructions are included. (auth)
Date: May 1, 1962
Creator: Anderson, B.; Davis, J.; Gelbard, E.; Jarvis, P. & Pearson, J.
Partner: UNT Libraries Government Documents Department

SYNCHROTRON OSCILLATIONS

Description: Numerical calculations were done which permit the deduction of many properties of the synchrotron oscillation problem. A review of the formulation framework to which the results are to be fitted is given. These are worked out for an arbitrary circular accelerator. The algebra would have to be modified slightly to include straight sections, but the numerical results are still useful. (J.R.D.)
Date: May 1, 1962
Creator: Hochman, E.H. & Barton, M.Q.
Partner: UNT Libraries Government Documents Department

ELECTRON POLARIZATION OPERATORS

Description: Two types of electron polarization operators are surveyed. A three- vector operator is described that is appropriate for calculations involving plane- wave states. A four-vector operator is described that can be used for taking account of external electromagnetic fields. (T.F.H.)
Date: April 1, 1961
Creator: Fradkin, D.M. & Good, R.H. Jr.
Partner: UNT Libraries Government Documents Department