Ab initio Monte Carlo shell model calculations for 7Li and 9Li low-lying spectra

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LIU Lang. Ab initio Monte Carlo shell model calculations for 7Li and 9Li low-lying spectra[J]. Chinese Physics C, 2015, 39(6): 064101. doi: 10.1088/1674-1137/39/6/064101
LIU Lang. Ab initio Monte Carlo shell model calculations for 7Li and 9Li low-lying spectra[J]. Chinese Physics C, 2015, 39(6): 064101.  doi: 10.1088/1674-1137/39/6/064101 shu
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Received: 2014-09-28
Revised: 1900-01-01
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Ab initio Monte Carlo shell model calculations for 7Li and 9Li low-lying spectra

    Corresponding author: LIU Lang,
  • School of Science, Jiangnan University, Wuxi 214122, China

Abstract: The low-lying spectra of 7Li and 9Li are investigated within an ab initio Monte Carlo Shell Model (MCSM) employing a realistic potential obtained via the Unitary Correlation Operator Method (UCOM). The MCSM calculations in a 4-major-shells model space for the binding energy and mass quadrupole moment of 7,9Li show good convergence when the MCSM dimension reaches 20. The excitation energy of the Jπ=1/2- state for 7Li and the magnetic moments for 7,9Li ground states in the MCSM with a treatment of spurious center-of-mass motion are close to the experimental data. Correct level ordering of Jπ=3/2- and 1/2- states for 7,9Li can be reproduced due to the inclusion of three-body correlations in the MCSM+UCOM. However, the excitation energy of Jπ=1/2- state for 9Li is not reproduced in the MCSM mainly due to the lack of larger model space.

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