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Title: Quantum Monte Carlo calculations of light nuclei.

Abstract

Quantum Monte Carlo calculations using realistic two- and three-nucleon interactions are presented for nuclei with up to eight nucleons. We have computed the ground and a few excited states of all such nuclei with Greens function Monte Carlo (GFMC) and all of the experimentally known excited states using variational Monte Carlo (VMC). The GFMC calculations show that for a given Hamiltonian, the VMC calculations of excitation spectra are reliable, but the VMC ground-state energies are significantly above the exact values. We find that the Hamiltonian we are using (which was developed based on {sup 3}H, {sup 4}He, and nuclear matter calculations) underpredicts the binding energy of p-shell nuclei. However our results for excitation spectra are very good and one can see both shell-model and collective spectra resulting from fundamental many-nucleon calculations. Possible improvements in the three-nucleon potential are also be discussed.

Authors:
Publication Date:
Research Org.:
Argonne National Lab., IL (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
11035
Report Number(s):
ANL/PHY/CP-97110
TRN: US0104228
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 2nd International Conference on Exotic Nuclei and Atomic Masses, Bellaire, MI (US), 06/23/1998--06/27/1998; Other Information: PBD: 25 Aug 1998
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BINDING ENERGY; EXCITATION; EXCITED STATES; HAMILTONIANS; LIGHT NUCLEI; MONTE CARLO METHOD; NUCLEON-NUCLEON INTERACTIONS; GROUND STATES; GREEN FUNCTION

Citation Formats

Pieper, S C. Quantum Monte Carlo calculations of light nuclei.. United States: N. p., 1998. Web.
Pieper, S C. Quantum Monte Carlo calculations of light nuclei.. United States.
Pieper, S C. 1998. "Quantum Monte Carlo calculations of light nuclei.". United States. https://www.osti.gov/servlets/purl/11035.
@article{osti_11035,
title = {Quantum Monte Carlo calculations of light nuclei.},
author = {Pieper, S C},
abstractNote = {Quantum Monte Carlo calculations using realistic two- and three-nucleon interactions are presented for nuclei with up to eight nucleons. We have computed the ground and a few excited states of all such nuclei with Greens function Monte Carlo (GFMC) and all of the experimentally known excited states using variational Monte Carlo (VMC). The GFMC calculations show that for a given Hamiltonian, the VMC calculations of excitation spectra are reliable, but the VMC ground-state energies are significantly above the exact values. We find that the Hamiltonian we are using (which was developed based on {sup 3}H, {sup 4}He, and nuclear matter calculations) underpredicts the binding energy of p-shell nuclei. However our results for excitation spectra are very good and one can see both shell-model and collective spectra resulting from fundamental many-nucleon calculations. Possible improvements in the three-nucleon potential are also be discussed.},
doi = {},
url = {https://www.osti.gov/biblio/11035}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 25 00:00:00 EDT 1998},
month = {Tue Aug 25 00:00:00 EDT 1998}
}

Conference:
Other availability
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