Nuclear properties according to the Thomas-Fermi model

Myers, William D.; Świa̧tecki, W.J.

doi:10.1016/0375-9474(95)00509-9

Cited by 584 publications

(483 citation statements)

References 32 publications

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“…In addition, we also chose to explore a combination of TF fission barriers and FRDM nuclear mass predictions and to gauge the resulting effect. The latter are close to the TF predictions, containing also the same shell corrections (Myers & Swiatecki 1996) and have already been used in some astrophysical rate calculations for nuclei with Z < 84. Figure 4 shows the quantity of primary importance, B f − S n , for the calculation of neutron-induced fission cross sections, based on the two model sets FRDM+TF and ETFSI.…”

Section: Neutron-induced Fission Rates For a Variety Of Mass Modelssupporting

confidence: 80%

Neutron-induced astrophysical reaction rates for translead nuclei

Panov

Korneev

Rauscher

et al. 2010

A&A

116

107

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Neutron-induced reaction rates, including fission and neutron capture, are calculated in the temperature range 10 8 ≤ T (K) ≤ 10 10 within the framework of the statistical model for targets with the atomic number 84 ≤ Z ≤ 118 (from Po to Uuo) from the neutron to the proton drip-line. Four sets of rates have been calculated, utilizing -where possible -consistent nuclear data for neutron separation energies and fission barriers from Thomas-Fermi (TF), Extended Thomas-Fermi plus Strutinsky Integral (ETFSI), Finite-Range Droplet Model (FRDM) and Hartree-Fock-Bogolyubov (HFB) predictions. Tables of calculated values as well as analytic seven parameter fits in the standard REACLIB format are supplied. We also discuss the sensitivity of the rates to the input, aiming at a better understanding of the variations introduced by the nuclear input.

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Section: Neutron-induced Fission Rates For a Variety Of Mass Modelssupporting

confidence: 80%

Neutron-induced astrophysical reaction rates for translead nuclei

Panov

Korneev

Rauscher

et al. 2010

A&A

116

107

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“…With the energy spread of the incident cyclotron beam, the small variation of the beam energy during irradiation, and the energy losses in the target (3.0 MeV), we expected the resulting 297 117 compound nuclei to have excitation energies between 37.2 and 41.4 MeV. Excitation energies of the compound nuclei are calculated using the masses found in [38,39]. The beam energy losses in the separator's entrance window (0.74 mg/cm 2 Ti foil), target backing, and target layer were calculated using the Nuclear Data Tables [40,41].…”

Section: Resultsmentioning

confidence: 99%

“…This could indicate a larger probability for decay by spontaneous fission in preference to β + /EC decay leading to 1 h 267 Rf and 11 s 281 Ds [5]. However, large uncertainties in half-life and/or the calculated β + /EC-decay energy [26,38,39,55,[59][60][61][62] for these isotopes prevent us from drawing definite conclusions.…”

Section: Discussionmentioning

confidence: 97%

Eleven new heaviest isotopes of elementsZ=105toZ=117identified among the products of
Oganessian¹,
Abdullin²,
Bailey³
et al. 2011
Phys. Rev. C
123
5
35
0
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“…36 In complete nuclear fusion reactions 292 Fl* compound nuclei at an excitation energy, E*, of 40-45 MeV were formed. 37,38 After deexcitation by evaporation of three or four neutrons, the resulting 288,289 Fl nuclei recoiled from the target into the separator TASCA operated in the "Small Image Mode". 32 The primary beam and unwanted nuclear reaction products were deflected inside the dipole magnet to a beam stop, while Fl was guided to the focal plane (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Superheavy Element Flerovium (Element 114) Is a Volatile Metal

et al. 2014

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Superheavy Element Flerovium (Element 114) Is a Volatile MetalAccess to the published version may require subscription. Superheavy Element Flerovium (Element 114) is a Volatile MetalAlexander Yakushev †, , Jacklyn M. ABSTRACT: The electron shell structure of superheavy elements, i.e., elements with atomic number Z ≥ 104, is influenced by strong relativistic effects caused by the high Z. Early atomic calculations on element 112 (copernicium, Cn) and element 114 (flerovium, Fl) having closed and quasiclosed electron shell configurations of 6d 10 7s 2 and 6d 10 7s 2 7p 1/2 , respectively, predicted them to be noble gas-like due to very strong relativistic effects on the 7s and 7p 1/2 valence orbitals. Recent fully relativistic calculations studying Cn and Fl in different environments suggest them to be less reactive compared to their lighter homologs in the groups, but still exhibiting a metallic character. Experimental gassolid chromatography studies on Cn have, indeed, revealed a metal-metal bond formation with Au. In contrast to this, for Fl, the formation of a weak bond upon physisorption on a Au surface was inferred from first experiments. Here, we report on a gas-solid chromatography study of the adsorption of Fl on a Au surface. Fl was produced in the nuclear fusion reaction 244 Pu( 48 Ca, 3-4n) 288,289 Fl and was isolated in-flight from the primary 48 Ca beam in a physical recoil separator. The adsorption behavior of Fl, its nuclear α-decay product Cn, their lighter homologs in groups 14 and 12, i.e., Pb and Hg, and the noble gas Rn were studied simultaneously by isothermal gas chromatography and thermochromatography. Two Fl atoms were detected. They adsorbed on a Au surface at room temperature in the first, isothermal part, but not as readily as Pb and Hg. The observed adsorption behavior of Fl points to a higher inertness compared to its nearest homolog in the group, Pb. However, the measured lower limit for the adsorption enthalpy of Fl on a Au surface points to the formation of a metal-metal bond of Fl with Au. Fl is the least reactive element in the group, but still a metal.

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Nuclear properties according to the Thomas-Fermi model

Cited by 584 publications

References 32 publications

Neutron-induced astrophysical reaction rates for translead nuclei

Neutron-induced astrophysical reaction rates for translead nuclei

Eleven new heaviest isotopes of elementsZ=105toZ=117identified among the products of
Oganessian¹,
Abdullin²,
Bailey³
et al. 2011
Phys. Rev. C
123
5
35
0
View full text Add to dashboard Cite

Superheavy Element Flerovium (Element 114) Is a Volatile Metal

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Nuclear properties according to the Thomas-Fermi model

Cited by 584 publications

References 32 publications

Neutron-induced astrophysical reaction rates for translead nuclei

Neutron-induced astrophysical reaction rates for translead nuclei

Eleven new heaviest isotopes of elementsZ=105toZ=117identified among the products ofOganessian1, Abdullin2, Bailey3 et al. 2011Phys. Rev. C1235350View full textAdd to dashboardCite

Superheavy Element Flerovium (Element 114) Is a Volatile Metal

Contact Info

Product

Resources

About

Eleven new heaviest isotopes of elementsZ=105toZ=117identified among the products of
Oganessian¹,
Abdullin²,
Bailey³
et al. 2011
Phys. Rev. C
123
5
35
0
View full text Add to dashboard Cite