Pygmy and Giant Dipole Resonances in Proton-Rich Nuclei $^{17,18}$Ne

doi:10.1088/0256-307X/34/8/082101

Chin. Phys. Lett.

2017, Vol. 34

Issue (8): 082101 DOI: 10.1088/0256-307X/34/8/082101

NUCLEAR PHYSICS

Pygmy and Giant Dipole Resonances in Proton-Rich Nuclei $^{17,18}$Ne

Hong Lv¹, Shi-Sheng Zhang², Zhen-Hua Zhang¹, Yu-Qian Wu¹, Li-Gang Cao^1**

¹School of Mathematics and Physics, North China Electric Power University, Beijing 102206
²School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191

Cite this article:

Hong Lv, Shi-Sheng Zhang, Zhen-Hua Zhang et al 2017 Chin. Phys. Lett. 34 082101

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Abstract The pygmy and giant dipole resonances in proton-rich nuclei $^{17,18}$Ne are investigated with a fully self-consistent approach. The properties of ground states are calculated in the Skyrme Hartree–Fock with the Bardeen–Cooper–Schrieffer approximation to take into account the pairing correlation. The quasiparticle random phase approximation (QRPA) method is used to explore the properties of excited dipole states. In the calculations the SLy5 Skyrme interaction is employed. In addition to the giant dipole resonances, pygmy dipole resonances (PDR) are found to be located in the energy region below 10 MeV in both $^{17,18}$Ne. The strength and transition density show that the low-lying states are typical PDR states. However, analyzing the QRPA amplitudes of proton and neutron 2 quasiparticle (2qp) configurations for a given low-lying state in $^{17,18}$Ne, we find that the PDR state is less collective, more like a single 2qp excitation.

Received: 21 April 2017 Published: 22 July 2017

PACS:	21.60.Jz	(Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations))
	21.60.Ev	(Collective models)
	24.30.Cz	(Giant resonances)
	24.30.Gd	(Other resonances)

Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11375022, 11575060, 11505058 and 11435014.

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https://cpl.iphy.ac.cn/10.1088/0256-307X/34/8/082101 OR https://cpl.iphy.ac.cn/Y2017/V34/I8/082101

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	Hong Lv
	Shi-Sheng Zhang
	Zhen-Hua Zhang
	Yu-Qian Wu
	Li-Gang Cao

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