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Proton radii of $^(4,6,8)He$ isotopes from high-precision nucleon-nucleon interactions

Abstract : Recently, precision laser spectroscopy on $^(6)He$ atoms determined accurately the isotope shift between $^(4)He$ and $^(6)He$ and, consequently, the charge radius of $^(6)He$. A similar experiment for $^(8)He$ is under way. We have performed large-scale ab initio calculations for $^(4,6,8)He$ isotopes using high-precision nucleon-nucleon (NN) interactions within the no-core shell model (NCSM) approach. With the CD-Bonn 2000 NN potential we found point-proton root-mean-square (rms) radii of $^(4)He$ and $^(6)He$ 1.45(1) fm and 1.89(4), respectively, in agreement with experiment and predict the $^(8)He$ point-proton rms radius to be 1.88(6) fm. At the same time, our calculations show that the recently developed nonlocal INOY NN potential gives binding energies closer to experiment, but underestimates the charge radii.
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Contributor : Béatrice Forrler <>
Submitted on : Monday, March 20, 2006 - 4:12:01 PM
Last modification on : Thursday, April 23, 2020 - 2:26:21 PM

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E. Caurier, P. Navratil. Proton radii of $^(4,6,8)He$ isotopes from high-precision nucleon-nucleon interactions. Physical Review C, American Physical Society, 2006, 73, pp.021302. ⟨10.1103/PhysRevC.73.021302⟩. ⟨in2p3-00025797⟩



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