منابع مشابه
Monte Carlo calculations
A Monte Carlo simulation using the PRESTA version of the EGS4 code has been employed as an investigative tool to calculate the absorbed dose in water close to 192Ir wire implants. It has been shown that a treatment planning system, such as GE Target II, using the Sievert integral and the Meisberger polynomial is only able to reproduce the Monte Carlo results at radial distances of 1 mm and fart...
متن کاملBenchmark quantum Monte Carlo calculations
Fixed node diffusion Monte Carlo !FN-DMC" atomization energies are calculated for a benchmark set of 55 molecules. Using single determinant trial wave functions, comparison with experiment yields an average absolute deviation of 2.9 kcal/mol, placing this simplest form of FN-DMC roughly at the same level of accuracy as the CCSD!T"/aug-cc-pVQZ method. However, unlike perturbative wave function e...
متن کاملQuantum Monte Carlo Calculations of Light Nuclei
The goal of ab-initio light-nuclei calculations is to understand nuclei as collections of nucleons interacting with realistic (bare) potentials through reliable solutions of the many-nucleon Schrödinger equation. Such calculations can study binding energies, excitation spectra, relative stability, densities, transition amplitudes, cluster-cluster overlaps, low-energy astrophysical reactions, an...
متن کاملLinear-scaling quantum Monte Carlo calculations.
A method is presented for using truncated, maximally localized Wannier functions to introduce sparsity into the Slater determinant part of the trial wave function in quantum Monte Carlo calculations. When combined with an efficient numerical evaluation of these localized orbitals, the dominant cost in the calculation, namely, the evaluation of the Slater determinant, scales linearly with system...
متن کاملQuantum Monte Carlo Calculations for Light Nuclei
Quantum Monte Carlo calculationsof ground and low-lying excited states for nuclei with A 8 are made using a realistic Hamiltonian that ts NN scattering data. Results for more than 40 diierent (J ; T) states, plus isobaric analogs, are obtained and the known excitation spectra are reproduced reasonably well. Various density and momentum distributions and electromagnetic form factors and moments ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1985
ISSN: 0074-1809
DOI: 10.1017/s0074180900147606