Browsing by Author "Nakada, Hitoshi"
Now showing items 1-11 of 11
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Calculating Level Densities of Heavy Nuclei by the Shell Model Monte Carlo Method
Authors:Alhassid, Yoram; Özen, Cem; Nakada, Hitoshi
Publisher and Date:(Academic Press Inc Elsevier Science, 2014)The microscopic calculation of nuclear level densities in the presence of correlations is a difficult many-body problem. The shell model Monte Carlo method provides a powerful technique to carry out such calculations using ...
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Collective enhancement of nuclear state densities by the shell model Monte Carlo approach
The shell model Monte Carlo (SMMC) approach allows for the microscopic calculation of statistical and collective properties of heavy nuclei using the framework of the configuration-interaction shell model in very large ...
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Collectivity in Heavy Nuclei in the Shell Model Monte Carlo Approach
The microscopic description of collectivity in heavy nuclei in the framework of the configuration-interaction shell model has been a major challenge. The size of the model space required for the description of heavy nuclei ...
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Crossover from Vibrational to Rotational Collectivity in Heavy Nuclei in the Shell-Model Monte Carlo Approach
Heavy nuclei exhibit a crossover from vibrational to rotational collectivity as the number of neutrons or protons increases from shell closure towards midshell but the microscopic description of this crossover has been a ...
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Level Densities of Heavy Nuclei in the Shell Model Monte Carlo Approach
Authors:Alhassid, Yoram; Bertsch, George F.; Gilbreth, Christopher N.; Nakada, Hitoshi; Özen, Cem
Publisher and Date:(EDP Sciences, 2016)Nuclear level densities are necessary input to the Hauser-Feshbach theory of compound nuclear reactions. However the microscopic calculation of level densities in the presence of correlations is a challenging many-body ...
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Nuclear level density of 161Dy in the shell Model Monte Carlo Method
We extend the shell-model Monte Carlo applications to the rare-earth region to include the odd-even nucleus Dy-161. The projection on an odd number of particles leads to a sign problem at low temperatures making it impractical ...
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Nuclear state densities of odd-mass heavy nuclei in the shell model Monte Carlo approach
The shell model Monte Carlo (SMMC) approach enables the microscopic calculation of nuclear state densities in model spaces that are many orders of magnitude larger than those that can be treated by conventional diagonalization ...
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Persistence of Vibrational Collectivity in Nuclear Level Densities
By applying the particle-number projection to the finite-temperature BCS theory to the state densities in the rare-earth nuclei and comparing its results to the SMMC ones we investigate effects of the particle-number ...
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Recent Advances in the Application of the Shell Model Monte Carlo Approach to Nuclei
Authors:Alhassid, Yoram; Bonett-Matiz M.; Mukherjee, A.; Nakada, Hitoshi; Özen, Cem
Publisher and Date:(IOP Publishing Ltd, 2015)The shell model Monte Carlo (SMMC) method is a powerful technique for calculating the statistical and collective properties of nuclei in the presence of correlations in model spaces that are many orders of magnitude larger ...
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Recent developments in the shell model Monte Carlo approach to nuclei
Authors:Alhassid, Yoram; Mukherjee, A.; Nakada, Hitoshi; Özen, Cem
Publisher and Date:(IOP Publishing Ltd, 2012)The shell model Monte Carlo (SMMC) approach provides a powerful method for the microscopic calculation of statistical and collective nuclear properties in model spaces that are many orders of magnitude larger than those ...
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Signatures of phase transitions in nuclei at finite excitation energies
The mean-field approximation predicts pairing and shape phase transitions in nuclei as a function of temperature or excitation energy. However in the finite nucleus the singularities of these phase transitions are smoothed ...