Rigorous spectral representation of relativistic random phase approximation for finite nuclei

LI Ning; YAO Hai-Bo; CHEN Xi; WU Shi-Shu

doi:10.1088/1674-1137/34/12/008

Chinese Physics C> 2010, Vol. 34> Issue(12) : 1830-1835 DOI: 10.1088/1674-1137/34/12/008

Rigorous spectral representation of relativistic random phase approximation for finite nuclei

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Abstract：
By using the rigorous spectral representation of relativistic random phase approximation, the low-lying excitation of finite nuclei and its longitudinal response function for quasielastic
electron scattering are calculated in the σ-ω model of quantum hadrodynamics. It is shown that the reproduction of the correct order of the 1^－ and 3^－ excitation states of ¹⁶O is due to the contribution of the exchange vertex. There is no significant influence of the retardation effect on the low-lying excitation states. In contrast, the retardation effect plays an important role in the electron scattering process of nuclei. The theoretical longitudinal responses of ¹²C and ⁴⁰Ca, including the contributions of the exchange vertex and the retardation effect, are suppressed and reproduce the experimental data better than the results excluding them.

References

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LI Ning, YAO Hai-Bo, CHEN Xi and WU Shi-Shu. Rigorous spectral representation of relativistic random phase approximation for finite nuclei[J]. Chinese Physics C, 2010, 34(12): 1830-1835. doi: 10.1088/1674-1137/34/12/008

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Received: 2010-02-03
Revised: 2010-04-06

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Rigorous spectral representation of relativistic random phase approximation for finite nuclei

Corresponding author: LI Ning,

Received Date: 2010-02-03

Accepted Date: 2010-04-06

Available Online: 2010-12-05

Abstract:

By using the rigorous spectral representation of relativistic random phase approximation, the low-lying excitation of finite nuclei and its longitudinal response function for quasielastic
electron scattering are calculated in the σ-ω model of quantum hadrodynamics. It is shown that the reproduction of the correct order of the 1^－ and 3^－ excitation states of ¹⁶O is due to the contribution of the exchange vertex. There is no significant influence of the retardation effect on the low-lying excitation states. In contrast, the retardation effect plays an important role in the electron scattering process of nuclei. The theoretical longitudinal responses of ¹²C and ⁴⁰Ca, including the contributions of the exchange vertex and the retardation effect, are suppressed and reproduce the experimental data better than the results excluding them.

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Rigorous spectral representation of relativistic random phase approximation for finite nuclei

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通讯作者: 陈斌, bchen63@163.com

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