Mass prediction of proton-rich nuclides with the Coulomb displacement energies in the relativistic point-coupling model

Sun, B.; Zhao, P. W.; Meng, J.

doi:10.1007/s11433-010-4222-8

Cited by 33 publications

(28 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When nuclear masses are not known experimentally, we have used the extrapolated masses and uncertainties as these have been proven to have a better predictive power than all available models [72,73]. We have identified 131 Cd and 132 Cd as additional key nuclei for precise mass measurements.…”

Section: Discussionmentioning

confidence: 99%

Reexamining the temperature and neutron density conditions forr-process nucleosynthesis with augmented nuclear mass models

Sun

Niu

et al. 2013

Phys. Rev. C

View full text Add to dashboard Cite

We explore the effects of nuclear masses on the temperature and neutron density conditions required for r-process nucleosynthesis using four nuclear mass models augmented by the latest atomic mass evaluation. For each model we derive the conditions for producing the observed abundance peaks at mass numbers A ∼ 80, 130, and 195 under the waiting-point approximation and further determine the sets of conditions that can best reproduce the r-process abundance patterns (r-patterns) inferred for the solar system and observed in metal-poor stars of the Milky Way halo. In broad agreement with previous studies, we find that (1) the conditions for producing abundance peaks at A ∼ 80 and 195 tend to be very different, which suggests that at least for some nuclear mass models, these two peaks are not produced simultaneously; (2) the typical conditions required by the critical waiting-point (CWP) nuclei with the N = 126 closed neutron shell overlap significantly with those required by the N = 82 CWP nuclei, which enables coproduction of abundance peaks at A ∼ 130 and 195 in accordance with observations of many metal-poor stars; and (3) the typical conditions required by the N = 82 CWP nuclei can reproduce the r-pattern observed in the metal-poor star HD 122563, which differs greatly from the solar r-pattern. We also examine how nuclear mass uncertainties affect the conditions required for the r-process and identify some key nuclei including 76 Ni to 78 Ni, 82 Zn, 131 Cd, and 132 Cd for precise mass measurements at rare-isotope beam facilities.

show abstract

Section: Discussionmentioning

confidence: 99%

Reexamining the temperature and neutron density conditions forr-process nucleosynthesis with augmented nuclear mass models

Sun

Niu

et al. 2013

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…As reviewed in Ref. [78], this empirical functional has been very successful in describing nuclear ground state properties, e.g., the Coulomb displacement energies between mirror nuclei [79], nuclear binding energies [80][81][82] and quadrupole moments [83][84][85] and phase transitions in the nuclear shape [86], and low-energy excited states including nuclear chiral rotations [87] and magnetic and antimagnetic rotations [88][89][90][91][92]. PC-PK1 has also been used to study properties of SHN [93][94][95].…”

Section: As Mentioned In Section 2 a Truncation [Nmentioning

confidence: 99%

Ground state properties and potential energy surfaces of 270Hs from multidimensionally-constrained relativistic mean field model

Lü

Zhou

2019

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

We study the ground state properties, potential energy curves and potential energy surfaces of the superheavy nucleus 270 Hs by using the multidimensionally-constrained relativistic mean-field model with the effective interaction PC-PK1. The binding energy, size and shape as well as single particle shell structure corresponding to the ground state of this nucleus are obtained. 270 Hs is well deformed and exhibits deformed doubly magic feature in the single neutron and proton level schemes. One-dimensional potential energy curves and two-dimensional potential energy surfaces are calculated for 270 Hs with various spatial symmetries imposed. We investigate in detail the effects of the reflection asymmetric and triaxial distortions on the fission barrier and fission path of 270 Hs. When the axial symmetry is imposed, the reflection symmetric and reflection asymmetric fission barriers both show a double-hump structure and the former is higher. However, when triaxial shapes are allowed the reflection symmetric barrier is lowered very much and then the reflection symmetric fission path becomes favorable. MDC-RMF model, superheavy nuclei, potential energy surface, fission barrier, reflection asymmetry, triaxial deformation PACS number(s): 21.10.-k, 21.60.Jz, 27.90.+b, 23.70.+j Citation: Meng X, Lu B N and Zhou S G, Ground state properties and potential energy surfaces of 270 Hs from multidimensionally-constrained relativistic mean field model, Sci.

show abstract

“…On the other hand, various local mass relations or formulae have been often demonstrated to have a better accuracy. For instance, in [91] the Coulomb displacement energy (CDE) was computed in the RMF model and the rms deviation with respect to all the available CDEs with Z 8 was improved by more than a factor of 5 in comparison with the corresponding rms value for absolute masses. Another highlight of local mass relations that has been extensively investigated in the last few years is the residual proton-neutron interactions [92][93][94].…”

Section: Some Related Topicsmentioning

confidence: 99%

Recent progress in theoretical studies of nuclear magnetic moments

Zhao

2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

Nuclear magnetic moment is highly sensitive to the underlying structure of atomic nuclei and therefore serves as a stringent test of nuclear models. The advanced nuclear structure models have been successful in analyzing many nuclear structure properties, but they still cannot provide a satisfactory description of nuclear magnetic moments. Recently attempts to summarize the present understanding on nuclear magnetic moments in both relativistic and non-relativistic theoretical models have been made. The detailed contents are covered in the issue entitled "Nuclear magnetic moments and related topics" (in Sci China Phys Mech Astron, Vol. 54, No. 2, 2011). In this paper some of the related achievements will be highlighted. nuclear magnetic moments, status and progress, relativistic and non-relativistic many-body models Citation: Zhao E G. Recent progress in theoretical studies of nuclear magnetic moments. Chin Sci Bull, 2012Bull, , 57: 4394-4399, doi: 10.1007 Nuclear magnetic moment is an important physical observable that reflects the interplay between collective and singleparticle degrees of freedom in atomic nuclei. It therefore provides a stringent test of various nuclear structure models. A concise but interesting history and present understanding of nuclear magnetic moments have been provided in [1].Since the successes of the nuclear shell model established in 1949 by Mayer and Jensen for the explanation of the magic numbers (Z or N = 2, 8, 20, 28, 50, 82, . . . ), the understanding of the magnetic moment of an odd-A nucleus has been done in the extreme single-particle picture which leads to the well known Schmidt values [2]. It was observed in the early 1950s [3], however, that almost all nuclear magnetic moments are sandwiched between the two Schmidt lines.The pion, predicted by Yukawa in 1935, and discovered experimentally by Powell in 1947, was pointed out to be very important for understanding nuclear magnetic moments by Miyazawa in 1951 [4] and by Villars in 1952 [5] via the one-pion exchange currents, which can be understood as a medium correction in comparison with the free nuclear magnetic moments. Besides the pion effect, the first-order configuration mixing was pointed out to be also important in the email: egzhao@mail.itp.ac.cn odd-A nuclei with a j j-closed core by Arima and Horie in 1954 [6,7]. This effect is also called the first-order core polarization or Arima-Horie effect. However, for the nuclei with a LS -closed core ± 1 nucleon, the first-order configuration mixing does not contribute to nuclear magnetic moments. In order to understand the difference between Schmidt values and experiment data in this type of nuclei, it was realized that one has to take into account the second-order configuration mixing, which is also called the tensor correlation. The isoscalar magnetic moments provide us the best evidence of the tensor correlations. There were also lots of discussion on whether the Δ-hole mixing can explain the magnetic moments [8][9][10].In the past decades, covariant density functio...

show abstract

Mass prediction of proton-rich nuclides with the Coulomb displacement energies in the relativistic point-coupling model

Cited by 33 publications

References 26 publications

Reexamining the temperature and neutron density conditions forr-process nucleosynthesis with augmented nuclear mass models

Reexamining the temperature and neutron density conditions forr-process nucleosynthesis with augmented nuclear mass models

Ground state properties and potential energy surfaces of 270Hs from multidimensionally-constrained relativistic mean field model

Recent progress in theoretical studies of nuclear magnetic moments

Contact Info

Product

Resources

About