Attempt to probe nuclear charge radii by cluster and proton emissions

Qian, Yibin; Ren, Zhongzhou; Ni, Dongdong

doi:10.1103/physrevc.87.054323

Cited by 16 publications

(10 citation statements)

References 43 publications

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“…In nuclear density functional theories based on the mean-field approach such as the Hartree-FockBogoliubov (HFB) model [15,16] and the relativistic mean-field (RMF) theory [17,18], nuclear charge radii are calculated in a self-consistent way by folding the charge density distribution. Besides, recent work attempts to deduce charge radii based on the α decay [19,20], and cluster and proton emission data [21]. In this work, however, different from the above approaches, we propose a set of new difference equations of charge radius for neighboring nuclei, independent of atomic number and charge.…”

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confidence: 99%

New charge radius relations for atomic nuclei

et al. 2014

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We show that the charge radii of neighboring atomic nuclei, independent of atomic number and charge, follow remarkably very simple relations, despite the fact that atomic nuclei are complex finite many-body systems governed by the laws of quantum mechanics. These relations can be understood within the picture of independent-particle motion and by assuming that neighboring nuclei have similar patterns in the charge density distribution. A root-mean-square (rms) deviation of 0.0078 fm is obtained between the predictions in these relations and the experimental values, i.e., a precision comparable modern experimental techniques. Such high accuracy relations are very useful to check the consistence of the nuclear charge radius surface and moreover to predict unknown nuclear charge radii, while large deviations from experimental data are seen to reveal the appearance of nuclear shape transition or coexsitence.PACS numbers: 21.10. Ft, 21.90.+f, 27.70.+q, 29.87.+g Like many systems governed by the laws of quantum mechanics, the nucleus is an object full of mysteries whose properties are much more difficult to characterize than those of macroscopic objects. Rather than build an exact replica of the nuclear system (almost an impossible job), nuclear physicists in reality have selected a different approach, using a relatively small number of measurable properties of quantum systems to specify the overall characteristic of the entire nucleus. Investigations of these properties and moreover using them as bridges to reveal the atomic nucleus, form the basis of present nuclear physics investigations. Nuclear extension in space, often characterized by charge radius, is one of such static properties.Nowadays, nuclear size data [1] constitute one of the most precise and extensive arrays of experimental information available for the interpretation of nuclear phenomena. The pioneering works by using various methods such as electron scattering and muonic atomic spectroscopy [2], indicated that a nuclide near the β-stability line behaves like a solid sphere with constant density. In recent decades, the enormous progress in size determination of exotic nuclides has been entwined with the realization of radioactive ion beams [3] and fast developments especially in ultra-high-sensitivity laser spectroscopy techniques [4,5]. The new measurements contributed to revealing, for example, the neutron skin effect [6,7] and the nuclear shape variances [8][9][10] when moving far away from the stability line. These new results are among the strongest motivations for the next generations of nuclear physics facilities, in which electron-scattering experiments [11,12] on unstable nu- * Corresponding author: bhsun@buaa.edu.cn † ymzhao@sjtu.edu.cn clei are under way. In the march towards the new era of nuclear physics, the knowledge of nuclear sizes plays a very important role in understanding complex atomic nuclei.New precision data in turn challenge the present theories and trigger innovations to interpret the results and to understand underlying...

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New charge radius relations for atomic nuclei

et al. 2014

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“…The nuclear charge radii can be derived from the proton decay half-lives. We have evaluated the nuclear charge radii using the semiempirical relation from [29]. Figure 4 shows the variation of √ 𝑅 against the mass number of the parent nuclei.…”

Section: Resultsmentioning

confidence: 99%

A Systematic Study of Proton Decay in Superheavy Elements

Srinivas

Manjunatha²,

Sridhar³

et al. 2022

Ukr. J. Phys.

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We have studied the proton decay in almost all superheavy nuclei with atomic number Z = 104–126. We have calculated the energy released during the proton decay (QP), penetration factor (P), normalization factor (F), and the proton decay half-lives. The latter are also longer than that of other decay modes such as the alpha decay and spontaneous fission. The competition of the proton decay with different decay modes reveals that the proton decay is not the dominant decay mode in the superheavy nuclei region. This means that superheavy nuclei are stable against the proton decay.

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“…The scattering method is not available because the halflives of the target nuclei is very short. The α-decay or cluster and proton emissions provide an alternative method for investigating nuclear size [43,51]. The formula of nuclear rms charge radii associates to the α-decay properties, such as α-decay energy and the logarithm of α-decay half-lives, is then established as…”

Section: B Nuclear Size Derived From α-Decay Propertiesmentioning

confidence: 99%

Local variations of charge radii for nuclei with even $Z$ from 84 to 120

An¹,

Dong²,

Li³

et al. 2021

Preprint

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In this work, the evolution of nuclear charge radii along even Z = 98 − 120 isotopes are systematically investigated by various approaches. The new parametrization sets based on liquid drop model (LDM) formulas are proposed by covering the shell closure effect at N = 126 and odd-even staggering (OES) in calibration procedure. In comparison with available database, highorder neutron-proton asymmetry may be indispensable in fitting protocol. The fitted formula within theoretical uncertainty below 0.02 fm is used to make extrapolative calculations. Results obtained by the deduced relationship associating to α-decay properties and the modified charge radius formula in relativistic mean field (RMF) model are also employed to make reinforce. The latter shows that the abrupt change of nuclear charge radii emerges apparently across N = 184 shell closure. In addition, the abrupt jumps at N = 146 and 200 are also disclosed remarkably due to the large deformation. These different methods give comparable predictions of nuclear charge radii for 286,288 Fl, 290,292 Lv and 288−310 120 isotopes.

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Attempt to probe nuclear charge radii by cluster and proton emissions

Cited by 16 publications

References 43 publications

New charge radius relations for atomic nuclei

New charge radius relations for atomic nuclei

A Systematic Study of Proton Decay in Superheavy Elements

Local variations of charge radii for nuclei with even $Z$ from 84 to 120

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