Isovector giant dipole resonances in proton-rich Ar and Ca isotopes
Isovector giant dipole resonances in proton-rich Ar and Ca isotopes
复制标题
富质子 Ar 和 Ca 同位素中的等向量巨偶极子共振
DOI:
10.1088/1674-1137/abdfbc
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发表时间:
2021-01
期刊:
影响因子:
--
通讯作者:
Cao Ligang
中科院分区:
文献类型:
--
作者:
Liu Ling;Liu Shuai;Zhang Shisheng;Cao Ligang
The isovector giant dipole resonances(IVGDR) in proton-rich Ar and Ca isotopes have been systematically investigated using the resonant continuum Hartree-Fock+BCS(HF+BCS) and quasiparticle random phase approximation(QRPA) methods. The Skyrme SLy5 and density-dependent contact pairing interactions are employed in the calculations. In addition to the giant dipole resonances at energy around 18 MeV, pygmy dipole resonances(PDR) are found to be located in the energy region below 12 MeV. The calculated energy-weighted moments of PDR in nuclei close to the proton drip-line exhaust about 4% of the TRK sum rule. The strengths decrease with increasing mass number in each isotopic chain. The transition densities of the PDR states show that motions of protons and neutrons are in phase in the interiors of nuclei, while the protons give the main contribution at the surface. By analyzing the QRPA amplitudes of proton and neutron 2-quasiparticle configurations for a given low-lying state, we find that only a few proton configurations give significant contributions. They contribute about 95% to the total QRPA amplitudes, which indicates that the collectivity of PDR states is not strong in proton-rich nuclei in the present study.
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影响因子:
3.6
作者:
YANG Ding;Cao Ligang;Ma Zhongyu
通讯作者:
Ma Zhongyu
DOI:
10.1140/epja/i2016-16176-0
发表时间:
2015-09
期刊:
The European Physical Journal A
影响因子:
--
作者:
Y. Kim;P. Papakonstantinou
通讯作者:
Y. Kim;P. Papakonstantinou
影响因子:
3.1
作者:
X. Roca-Maza;G. Pozzi;M. Brenna;K. Mizuyama;G. Colò
通讯作者:
X. Roca-Maza;G. Pozzi;M. Brenna;K. Mizuyama;G. Colò
影响因子:
3.1
作者:
Vretenar, D.;Niu, Y. F.;Paar, N.;Meng, J.
通讯作者:
Meng, J.
影响因子:
18.1
作者:
N. Paar;D. Vretenar;E. Khan;G. Colò
通讯作者:
N. Paar;D. Vretenar;E. Khan;G. Colò