The NUBASE2016 evaluation of nuclear properties

Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.

doi:10.1088/1674-1137/41/3/030001

Cited by 592 publications

(568 citation statements)

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“…A similar systematic behavior is observed in other chains of isotones and isotopes in the 208 Pb region [6]. and neutrons ∆ nn (∘) are calculated using nuclear masses [3]. Here and below, the experimental data are from [4,5].…”

Section: Introductionsupporting

confidence: 56%

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Pairing and (9/2)ⁿ configuration in nuclei in the ²⁰⁸Pb region

et al. 2018

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Abstract. Excited states in low-energy spectra in nuclei near 208 Pb are considered. The pure ( j = 9/2) n configuration approximation with delta-force is used for ground state multiplet calculations. The multiplet splitting is determined by the pairing energy, which can be defined from the even-odd straggering of the nuclear masses. For the configurations with more than two valence nucleons, the seniority scheme is used. The results of the calculations agree with the experimental data for both stable and exotic nuclei within 0.06-6.16%. Due to simplicity and absence of the fitted parameters, the model can be easily applied for studies of nature of the excited states in a wide range of nuclei.

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Section: Introductionsupporting

confidence: 56%

“…For comparison, the results of calculations [13,19] and [16] (SM3) are given. One can see that use of pairing energy estimated from the nuclear mass data [3] provide a good description not only for GSM with the senority s = 2, but also for experimental states with J P = 12 + , 10 + with s = 4. …”

Section: Ayss-2017mentioning

confidence: 94%

Pairing and (9/2)ⁿ configuration in nuclei in the ²⁰⁸Pb region

et al. 2018

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“…The literature value for the half-life of isomeric 94m Ru as neutral atoms at rest is 71 ± 4 μs [17]. They decay predominantly via isomeric transition to the 6 + state which lies 146 keV lower in energy, whereas other competing processes are negligible [18].…”

Section: Case Study: Lifetime Of 94m Ru 44+mentioning

confidence: 97%

Statistical approaches to lifetime measurements with restricted observation times

et al. 2017

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Two generic methods based on frequentism and Bayesianism are presented in this work aiming to adequately estimate decay lifetimes from measured data, while accounting for restricted observation times in the measurements. All the experimental scenarios that can possibly arise from the observation constraints are treated systematically and formulas are derived. The methods are then tested against the decay data of bare isomeric 94m Ru 44+ , which were measured using isochronous mass spectrometry with a timing detector at the CSRe in Lanzhou, China. Applying both methods in three distinct scenarios yields six different but consistent lifetime estimates. The deduced values are all in good agreement with a prediction based on the neutral-atom value modified to take the absence of internal conversion into account. Potential applications of such methods are discussed.

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“…In fact, α decay has been taken as a tool to recognize the nuclear radii at an early stage of nuclear physics, despite the rough assumptions. Owing to the advanced experimental facilities and theoretical approaches, improved experimental data have been accumulated for the α decay process [1,2,4] and considerable progresses have also been made for the α decay calculations [5][6][7][8][9][10][11][12][13]. With these in mind, we propose to establish a bridge between the nuclear radii and the experimental α decay data.…”

Section: Background and Motivationmentioning

confidence: 99%

Attempt to connect the nuclear charge radii with the experimental α decay data for superheavy nuclei

Qian

2018

EPJ Web Conf.

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Abstract. Significant progresses have been made so far for the synthesis of the heaviest elements, while the knowledge of them appears to be quite limited even when it comes to basic properties, e.g., their size. On the other side, the observation of α decay chains is the main tool to identify the newly produced elements. In this report, we propose to make use of the available experimental α decay data to extract the nuclear charge radii of superheavy nuclei. Within the density dependent cluster model, the nucleon density distribution of the target nucleus is determined by exactly reproducing the measured α decay half-life of its parent, finally leading to the nuclear radii. Encouraged by the agreement between theory and experiment for heavy nuclei, we extend the study to the region of superheavy nuclei as well. Background and motivationWith the advent of improved facilities and technologies, a great deal of experimental efforts have been devoted to synthesize the superheavy nuclei (SHN), leading to the makeup of nuclidic chart up to Z = 118 [1, 2]. The α decay chains are not only taken as the main source to identify the newly synthesized SHN, but also provide insight knowledge about their properties. As well known, there are available methods to measure the nuclear charge radius such as particles scattering on the target nuclei, Kα X rays, measurements of transitions energies in muonic atoms and optical isotopes shifts [3]. Unfortunately, the detection on the SHN radii is still difficult using these methods due to short lifetimes and tiny cross sections of heaviest nuclei. It is therefore interesting to employ an alternative approach using the available experimental α decay data to extract more information on structural properties, e.g., the nuclear charge radii, for superheavy nuclei. In fact, α decay has been taken as a tool to recognize the nuclear radii at an early stage of nuclear physics, despite the rough assumptions. Owing to the advanced experimental facilities and theoretical approaches, improved experimental data have been accumulated for the α decay process [1, 2, 4] and considerable progresses have also been made for the α decay calculations [5][6][7][8][9][10][11][12][13]. With these in mind, we propose to establish a bridge between the nuclear radii and the experimental α decay data. The main logic of the present model will be presented with initial results in the following section. * e-mail: qyibin@njust.edu.cn Brief introduction of theoretical approach and resultsGiven that the α decaying nucleus is pictured as an α particle interacting with an axially symmetric deformed core nucleus, the total α-core potential is composed of the nuclear and Coulomb terms,where θ is the orientation angle of the emitted α particle with respect to the symmetric axis of the core, and λ is the renormalization factor for the depth of nuclear potential. Based on the double folding integral, the nuclear and Coulomb potentials can be constructed as [14]υ(s = |r 2 + r − r 1 |), where υ(s) denotes the M3Y-Reid type nucle...

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The NUBASE2016 evaluation of nuclear properties

Cited by 592 publications

References 0 publications

Pairing and (9/2)ⁿ configuration in nuclei in the ²⁰⁸Pb region

Pairing and (9/2)ⁿ configuration in nuclei in the ²⁰⁸Pb region

Statistical approaches to lifetime measurements with restricted observation times

Attempt to connect the nuclear charge radii with the experimental α decay data for superheavy nuclei

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The NUBASE2016 evaluation of nuclear properties

Cited by 592 publications

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Pairing and (9/2)n configuration in nuclei in the 208Pb region

Pairing and (9/2)n configuration in nuclei in the 208Pb region

Statistical approaches to lifetime measurements with restricted observation times

Attempt to connect the nuclear charge radii with the experimental α decay data for superheavy nuclei

Contact Info

Product

Resources

About

Pairing and (9/2)ⁿ configuration in nuclei in the ²⁰⁸Pb region

Pairing and (9/2)ⁿ configuration in nuclei in the ²⁰⁸Pb region