### 10844239 results

Contributors: Michael Monkenbusch

Date: 2019-12-05

... Abstract Subroutines are supplied which allow for the computation of lattice sums and their Fourier transforms including first and second derivatives for potentials of the form 1 r^nfor arbitrary integer n and arbitrary lattices. All summation limits and parameters are automatically determined according to the desired accuracy. By using a generalized Ewald-type summation scheme arbitrary accuracy may be achieved with a limited number of summation terms down to exponents n=1. The routines were develo... Title of program: FP Catalogue Id: ACBM_v1_0 Nature of problem Lattice sums over 1/r^n potentials and their FOURIER transforms and derivatives of them are needed for lattice (dynamical) calculations on molecular crystals. The convergence of a naive direct summation is bad for lower n. Versions of this program held in the CPC repository in Mendeley Data ACBM_v1_0; FP; 10.1016/0010-4655(91)90027-I This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: D. Banks, I.C. Percival, J.McB. Wilson

Date: 2019-12-05

... Title of program: EVAR Catalogue Id: ACQT_v1_0 Nature of problem Flexible representation of the classical relative motion of two particles interacting through a general central force. Versions of this program held in the CPC repository in Mendeley Data ACQT_v1_0; EVAR; 10.1016/0010-4655(71)90021-X ACQT_v2_0; EVAR EDITION 02; 10.1016/0010-4655(72)90068-9 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: Michal Mereš, Ivan Melo, Boris Tomášik, Vladimír Balek, Vladimír Černý

Date: 2019-12-05

... Abstract We propose a novel algorithm, called REGGAE, for the generation of momenta of a given sample of particle masses, evenly distributed in Lorentz-invariant phase space and obeying energy and momentum conservation. In comparison to other existing algorithms, REGGAE is designed for the use in multiparticle production in hadronic and nuclear collisions where many hadrons are produced and a large part of the available energy is stored in the form of their masses. The algorithm uses a loop simulating... Title of program: REGGAE (REscatterig-after-Genbod GenerAtor of Events) Catalogue Id: AEJR_v1_0 Nature of problem The task is to generate momenta of a sample of particles with given masses which obey energy and momentum conservation. Generated samples should be evenly distributed in the available Lorentz invariant phase space. Versions of this program held in the CPC repository in Mendeley Data AEJR_v1_0; REGGAE (REscatterig-after-Genbod GenerAtor of Events); 10.1016/j.cpc.2011.06.015 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: Kálmán Varga

Date: 2019-12-05

... Abstract We present a computer code that analytically evaluates the matrix elements of the microscopic nuclear Hamiltonian between Slater determinants of Gaussian packet single particle orbits. Such matrix elements appear in the Generator Coordinate Model and the Resonating Group Model versions of the microscopic multicluster calculations. Title of program: MCKER Catalogue Id: ADFU_v1_0 Nature of problem This computer code constructs matrix elements to be used in microscopic studies of light multicluster system. Versions of this program held in the CPC repository in Mendeley Data ADFU_v1_0; MCKER; 10.1016/S0010-4655(97)00031-3 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: Alejandro Lorca, Tord Riemann

Date: 2019-12-05

... Abstract aITALC, a new tool for automating loop calculations in high energy physics, is described. The package creates Fortran code for two-fermion scattering processes automatically, starting from the generation and analysis of the Feynman graphs. We describe the modules of the tool, the intercommunication between them and illustrate its use with three examples. Title of program: aITALC version 1.2.1 Catalogue Id: ADWO_v1_0 Nature of problem Calculation of differential cross sections for e + e - annhilation in one-loop approximation. Versions of this program held in the CPC repository in Mendeley Data ADWO_v1_0; aITALC version 1.2.1; 10.1016/j.cpc.2005.09.003 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: C.J. Noble

Date: 2019-12-05

... Title of program: IPEXMAT Catalogue Id: ACZU_v1_0 Nature of problem A convenient description of atomic charge transfer collisions at moderate and high velocities is provided by the impact parameter formalism. Within this formalism it is advantageous to use a basis consisting of Slater-type orbitals which possess the virtue of having an appropriate asymptotic behaviour. This choice, however, leads to exchange integrals which are difficult to compute rapidly. The present collection of subroutines is designed to compute tables of these one- electron exchange integr ... Versions of this program held in the CPC repository in Mendeley Data aczu_v1_0; IPEXMAT; 10.1016/0010-4655(80)90087-9 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: E.R. Christensen

Date: 2019-12-05

... Title of program: MCD Catalogue Id: AAUL_v1_0 Nature of problem Multiple photon scattering in a spheric medium is considered. The photons are assumed to originate from a mono-energetic point source situated at the center. The relative photon track length, weighted with a detector efficiency spectrum, is calculated in consecutive radial intervals. In order to contribute to the track length, the elements of the photon paths must form an angle with radius vector which is greater than a specified cut-off angle. Versions of this program held in the CPC repository in Mendeley Data AAUL_v1_0; MCD; 10.1016/0010-4655(74)90088-5 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: Carles Ayala, Marià Baig

Date: 2019-12-05

... Abstract We present a package of VAX FORTRAN programs that analyze the information coming from two sets of FORTRAN routines. The first set of routines perform strong coupling series expansions in pure SU(2) lattice gauge theory mixed actions. The most general mixed action we are able to analyze is a mixing of the spin 1 2 , 1, 3 2 and 2 representations.... Title of program: STRONG_SU2 Catalogue Id: ABLQ_v1_0 Nature of problem We present a package of FORTRAN routines and programs able to study strong coupling series expansions in pure SU(2) lattice gauge theory mixed actions. The most general mixed action that can be analyzed is a mixing of the spin 1/2, 1, 3/2 and 2 representations. Versions of this program held in the CPC repository in Mendeley Data ABLQ_v1_0; STRONG_SU2; 10.1016/0010-4655(90)90145-Q This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: V. Fack, S.N. Pitre, J. Van der Jeugt

Date: 2019-12-05

... Abstract A program to generate a summation formula in terms of 6-j coefficients for a general angular momentum recoupling coefficient is described. This algorithms makes use of binary tree transformations as introduced by Burke [Comput. Phys. Commun. 1 (1970) 241] in the program NJSYM. Due attention is paid to finding an optimal summation formula with a minimal number of summation variables, thereby improving the results of NJSYM. The results obtained here are at least as good as (and often better tha... Title of program: NJFORMULA Catalogue Id: ACVV_v1_0 Nature of problem A general recoupling coefficient for an arbitrary number of (integer or half-integer) angular momenta is expressed as a multiple sum over products of 6-j coefficients, including phase factors and square root factors. This summation formula can then be evaluated for given values of the angular momenta (for this purpose we will provide a program NJSUMMATION [5]). Versions of this program held in the CPC repository in Mendeley Data ACVV_v1_0; NJFORMULA; 10.1016/0010-4655(94)90055-8 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: H.D. Düdder, D.B. Henderson

Date: 2019-12-05

... Title of program: RAMSES Catalogue Id: ABUL_v1_0 Nature of problem The model used in RAMSES is intended to study the propagation of a laser pulse through a background gas or plasma. The laser pulse is composed of macroscopic photons whose trajectories are calculated. Gradients in the refractive index, which may be computed self- consistently from photoionization of the plasma, change the direction of the photons and this can lead to focusing or defocusing of the pulse. Rotational symmetry is assumed for both the laser pulse and the background. Computations with ... Versions of this program held in the CPC repository in Mendeley Data ABUL_v1_0; RAMSES; 10.1016/0010-4655(75)90003-X This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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