Half lives of heaviest nuclei with Woods-Saxon potential

Łojewski, Z.; Baran, A.

doi:10.1007/bf01283771

Cited by 9 publications

(9 citation statements)

References 20 publications

(34 reference statements)

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“…The experimentally determined half-life is very close to the SF half-life estimated from the experimentally determined hindrances [HOF89]. The SF half-life calculated from Lojewski and Baran[LOJ88] is off by over an order of magnitude, which is consistent with results for other known odd A rutherfordium isotopes.…”

supporting

confidence: 82%

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Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

Czerwinski

1992

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Chemical properties of rutherfordium (Rf) have been investigated with the organic ligands triisooctylamine (TIOA), tributylphosphate (TBP), and thenoyltrifluoroacetone (TTA). The TIOA studies showed that Rf behaves differently than Th and Eu and most similarly to Zr, only Zr and Rf extract from 12 M HCI. This result is further evidence that Rf is a Group 4 element. Studies with TBP showed that Rf chemical behavior differed from the other Group 4 elements. The extractior_ by TBP at different chloride concentrations showed that Rf at times behaves more like Pu 4+ than Zr or Hf. At high chloride concentrations, Rf and Pu extraction decreased. Under the same conditions, Zt', Hf and Th extraction increased, in addition, Rf extraction by TBP was affected by hydrogen ion concentration, while Zr and Hf extraction was not. TTA ..×tractions were used to determine the Keq, Khyd, and the ionic radius of Rf. .P.' The log Keq for Rf with 'TTA was calculated to be 3.18 i 0.90. The first four log Khyd'S for Rf are calculated to be-2.6 _:0.7,-5.9 ± 1.7,-10.2 :_2.9, and-14.5 _: 4.1. These hydrolysis constants indicate that Rf will not hydrolyze at conditions under which Zr, Hf, and Pu will. Calculations of the ionic radius were made with the log Keq for Rf derived with TTA. The ionic radius of Rf was calculated to be " 91 ± 4 pm for the 6-coordinate species and 102 ± 4 pm for the 8-coordinate species. A search for the isotope 263Rf was conducted using TTA chemistry. In 300 experiments, seven SF events and no alpha events were observed in the Rf chemical fraction. The observed SF events were attributed to 263Rf and had + 300 a half-life of 500-200 seconds and a production cross section of 140-+ 50 pb.

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supporting

confidence: 82%

“…The electron capture half-life was estimated using the method given in Appendix V of the The following equations are from Lojewski and Baran [LOJ88]. The calculation for the SF half-life uses a single-particle Woods-Saxon potential (Figure 66).…”

Section: Electron Capturementioning

confidence: 99%

Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

Czerwinski

1992

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“…Asterisks indicate recent measurements of Dubna group [59]. region of transuranium nuclei [56][57][58] lead one to believe the accuracy of this type of calculation remains similar for SHE.…”

Section: Comparison To Experimental Datamentioning

confidence: 91%

Global properties of even-even superheavy nuclei in macroscopic-microscopic models

Baran

Łojewski²,

Sieja

et al. 2005

Phys. Rev. C

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A systematic study of global properties of superheavy nuclei in the framework of macroscopic-microscopic method is performed. Equilibrium deformations, masses, quadrupole moments, radii, shell energies, fission barriers and half-lives are calculated using the following macroscopic models: Myers-Swiatecki liquid drop, droplet, Yukawa-plus-exponential, and Lublin-Strasbourg drop. Shell and pairing energies are calculated in Woods-Saxon potential with a universal set of parameters. The analysis covers a wide range of even-even superheavy nuclei from Z=100 to 122. Magic and semimagic numbers occurring in this region are indicated and their influence on the observables is discussed. The strongest shell effects appear at proton number Z=114 and at neutron number N=184. Deformed shell closures are found at N=152 and 162. Spontaneous fission half-lives are calculated in a dynamical approach where the full minimization of the action integral in a three-dimensional deformation space of $\beta$ deformations is performed. The fission half-lives obtained this way are two orders of magnitude smaller than the ones resulting from static calculations. The agreement of theoretical results and experimental data is satisfying

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“…The results are presented in Table 28. The following equations are from Lojewski and Baran [LOJ88]. The calculation for the SF half-life uses a single-particle Woods-Saxon potential (Figure 66).…”

mentioning

confidence: 99%

Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

Czerwinski

1992

View full text Add to dashboard Cite

Half lives of heaviest nuclei with Woods-Saxon potential

Cited by 9 publications

References 20 publications

Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

Global properties of even-even superheavy nuclei in macroscopic-microscopic models

Studies of fundamental properties of rutherfordium (Element 104) using organic complexing agents

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