Study of proton resonances in 18Ne via resonant elastic scattering of 17F+p and its astrophysical implication

He, Jiajia; Hu, J.; Xu, Shiwei; Chen, Zhiqiang; Zhang, Xueying; Wang, Jiansong; Yu, Xiao; Zhang, LiYong; Li, Long; Yang, Y. Y.; Ma, P.; Zhang, Xueheng; Hu, Zhenzhen; Guo, Zhimou; Xu, X.; Yuan, Xiaohui; Lu, W.; Yu, Yuhong; Zang, Yunxiang; Tang, S.W.; Ye, RuiPing; Chen, JinDa; Jin, S.; Wang, Shitao; Ma, J.B.; Liu, Longxiang; Bai, Zhiyong; Lei, X.; Sun, Z.; Zhang, Yuhu; Zhou, X. H.; Xu, H. S.; Su, J.; Li, Ertao; Wang, Hongwei; Tian, W. D.; Li, Xiangqing

doi:10.1007/s11433-011-4407-9

Cited by 5 publications

(7 citation statements)

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“…In exotic nuclei, the neutron (or proton) Fermi surface is close to the particle continuum; thus, the contribution of the continuum is important [190][191][192][193][194][203][204][205][206][207][208][209][210][211][212][213][214][215][216][217][218]. Many methods or models developed for the studies of resonances [219] have been adopted to locate the position and to calculate the width of a nuclear resonant state, e.g., the analytical continuation in coupling constant (ACCC) method [220][221][222][223][224][225], the real stabilization method [226][227][228][229][230][231], the complex scaling method (CSM) [232][233][234][235], the coupled channels method [236][237][238], and some others [239,240].…”

Section: Introductionmentioning

confidence: 99%

Hidden pseudospin and spin symmetries and their origins in atomic nuclei

2015

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Symmetry plays a fundamental role in physics. The quasi-degeneracy between single-particle orbitals $(n, l, j = l + 1/2)$ and $(n-1, l + 2, j = l + 3/2)$ indicates a hidden symmetry in atomic nuclei, the so-called pseudospin symmetry (PSS). Since the introduction of the concept of PSS in atomic nuclei, there have been comprehensive efforts to understand its origin. Both splittings of spin doublets and pseudospin doublets play critical roles in the evolution of magic numbers in exotic nuclei discovered by modern spectroscopic studies with radioactive ion beam facilities. Since the PSS was recognized as a relativistic symmetry in 1990s, many special features, including the spin symmetry (SS) for anti-nucleon, and many new concepts have been introduced. In the present Review, we focus on the recent progress on the PSS and SS in various systems and potentials, including extensions of the PSS study from stable to exotic nuclei, from non-confining to confining potentials, from local to non-local potentials, from central to tensor potentials, from bound to resonant states, from nucleon to anti-nucleon spectra, from nucleon to hyperon spectra, and from spherical to deformed nuclei. Open issues in this field are also discussed in detail, including the perturbative nature, the supersymmetric representation with similarity renormalization group, and the puzzle of intruder states.Comment: Review Article, 242 pages, 58 figures, 10 table

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Section: Introductionmentioning

confidence: 99%

Hidden pseudospin and spin symmetries and their origins in atomic nuclei

2015

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“…In these nuclei, the neutron (or proton) Fermi surface is close to the particle continuum; thus, the contribution of the continuum is important [28,[68][69][70][71][72][73][74][75]. Many methods or models developed for the study of resonances [76] have been adopted to locate the position and to calculate the width of a nuclear resonant state, e.g., the analytical continuation in coupling constant (ACCC) method [77,78], the real stabilization method (RSM) [79][80][81], the complex scaling method (CSM) [82], the coupledchannels method [83,84], and some others [85,86].…”

Section: Introductionmentioning

confidence: 99%

Pseudospin symmetry in single-particle resonances in spherical square wells

2013

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Background:The pseudospin symmetry (PSS) has been studied extensively for bound states. Recently, we justified rigorously that the PSS in single-particle resonant states is exactly conserved when the attractive scalar and repulsive vector potentials of the Dirac Hamiltonian have the same magnitude but opposite sign [Phys. Rev. Lett. 109, 072501 (2012)]. Purpose: To understand more deeply the PSS in single-particle resonant states, we focus on several issues related to the exact conservation and breaking mechanism of the PSS in single-particle resonances. In particular, we are interested in how the energy and width splittings of PS partners depend on the depth of the scalar and vector potentials. Methods: We investigate the asymptotic behaviors of radial Dirac wave functions. Spherical square-well potentials are employed in which the PSS breaking part in the Jost function can be well isolated. By examining the zeros of Jost functions corresponding to small components of the radial Dirac wave functions, general properties of the PSS are analyzed. Results: By examining the Jost function, the occurrence of intruder orbitals is explained and it is possible to trace continuously the PS partners from the PSS limit to the case with a finite potential depth. The dependence of the PSS in resonances as well as in bound states on the potential depth is investigated systematically. We find a threshold effect in the energy splitting and an anomaly in the width splitting of pseudospin partners when the depth of the single-particle potential varies from zero to a finite value. Conclusions: The conservation and the breaking of the PSS in resonant states and bound states share some similar properties. The appearance of intruder states can be explained by examining the zeros of Jost functions. Origins of the threshold effect in the energy splitting and the anomaly in the width splitting of PS partners, together with many other problems, are still open and should be further investigated.

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“…Excited states in 18 Ne, which could affect significantly the reaction rate of the key stellar 14 O(α,p) 17 F reaction, have been studied via the proton elastic scattering of 17 F+p. Clear proton resonances in 18 Ne were seen [30]. Lithium isotopes play special roles in the process of nucleosyntheses.…”

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“…Experiments related to nuclear astrophysics have been carried out at HIRFL in Lanzhou [30] and at the HI-13 tandem accelerator in Beijing [31]. Excited states in 18 Ne, which could affect significantly the reaction rate of the key stellar 14 O(α,p) 17 F reaction, have been studied via the proton elastic scattering of 17 F+p.…”

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confidence: 99%

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Towards the drip lines of the nuclide landscape

Fang

2012

Chin. Sci. Bull.

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In the paper we review the recent progress of studies in unstable nuclei, mainly affiliated with the facilities of radioactive ion beams in China, including both experimental and theoretical aspects of researches. Many experiments for reactions, decays and structures have been performed targeting better understandings of properties of unstable nuclei. Special experimental measurements related to nuclear astrophysics have been done to seek insights into the processes of syntheses of elements in the universe. Theoretical calculations have provided many useful predictions on the behaviors of unstable nuclei, with model developments. Studies covered many mass regions from light to superheavy nuclei, giving plenty of information about the structures of unstable nuclei, towards the limits of existence of atomic nuclei. unstable nuclei, radioactive ion beams, nuclear astrophysics, experiment, theory Citation: Xu F R. Towards the drip lines of the nuclide landscape.

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Study of proton resonances in 18Ne via resonant elastic scattering of 17F+p and its astrophysical implication

Cited by 5 publications

References 28 publications

Hidden pseudospin and spin symmetries and their origins in atomic nuclei

Hidden pseudospin and spin symmetries and their origins in atomic nuclei

Pseudospin symmetry in single-particle resonances in spherical square wells

Towards the drip lines of the nuclide landscape

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