Giant Monopole Resonance and Symmetry Energy

LIANG Jun; MA Zhong-Yu

Chinese Physics C> 2007, Vol. 31> Issue(5) : 470-474

Giant Monopole Resonance and Symmetry Energy

LIANG Jun ^, ,
MA Zhong-Yu

China Institute of Atomic Energy, Beijing 102413, China2 Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

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Abstract：
Nuclear matter incompressibility is discussed by the monopole compression modes in nuclei in the framework of a fully consistent relativistic random phase approximation, based on effective Lagrangians with a mixed isoscalar-isovector nonlinear coupling term. A predicted value of the matter incompressibility coefficient is given by comparison between experimental and calculated energies of the isoscalar giant monopole resonance (ISGMR) in nuclei ²⁰⁸Pb, ¹⁴⁴Sm, ¹¹⁶Sn and ⁹⁰Zr. The new isoscalar-isovector nonlinear coupling softens the nuclear matter symmetry energy without ruining the agreement with experimentally existing ground state properties. The effect of the softening of the symmetry energy on the ISGMR is discussed.

References

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LIANG Jun and MA Zhong-Yu. Giant Monopole Resonance and Symmetry Energy[J]. Chinese Physics C, 2007, 31(5): 470-474.

LIANG Jun and MA Zhong-Yu. Giant Monopole Resonance and Symmetry Energy[J]. Chinese Physics C, 2007, 31(5): 470-474. shu

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Received: 2006-09-25
Revised: 2006-11-15

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通讯作者: 陈斌, [email protected]

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Giant Monopole Resonance and Symmetry Energy

Corresponding author: LIANG Jun,

China Institute of Atomic Energy, Beijing 102413, China2 Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

Received Date: 2006-09-25

Accepted Date: 2006-11-15

Available Online: 2007-05-05

Abstract: Nuclear matter incompressibility is discussed by the monopole compression modes in nuclei in the framework of a fully consistent relativistic random phase approximation, based on effective Lagrangians with a mixed isoscalar-isovector nonlinear coupling term. A predicted value of the matter incompressibility coefficient is given by comparison between experimental and calculated energies of the isoscalar giant monopole resonance (ISGMR) in nuclei ²⁰⁸Pb, ¹⁴⁴Sm, ¹¹⁶Sn and ⁹⁰Zr. The new isoscalar-isovector nonlinear coupling softens the nuclear matter symmetry energy without ruining the agreement with experimentally existing ground state properties. The effect of the softening of the symmetry energy on the ISGMR is discussed.

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Giant Monopole Resonance and Symmetry Energy

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