Nuclear Data Sheets for A = 266–294

Gupta, M.; Burrows, T.W.

doi:10.1016/j.nds.2005.10.005

Cited by 57 publications

(48 citation statements)

References 122 publications

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“…Superheavy element (SHE) are hypothesised to exist in this region. The next double shell closer, beyond 208 Pb, predicted at Z=114, N=184, may have suprisingly long half-life, even of the order of a million year [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Relativistic mean-field study of the properties ofZ=117nuclei and the decay chains of the293,294117 isotopes

2011

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We have calculated the binding energy, root-mean-square radius and quadrupole deformation parameter for the recently synthesized superheavy element Z=117, using the axially deformed relativistic mean field (RMF) model. The calculation is extended to various isotopes of Z=117 element, strarting from A=286 till A=310. We predict almost spherical structures in the ground state for almost all the isotopes. A shape transition appears at about A=292 from prolate to a oblate shape structures of Z=117 nucleus in our mean field approach. The most stable isotope (largest binding energy per nucleon) is found to be the 288 117 nucleus. Also, the Q-value of α-decay Qα and the half-lives Tα are calculated for the α-decay chains of 293 117 and 294 117, supporting the magic numbers at N=172 and/ or 184.

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Section: Introductionmentioning

confidence: 99%

Relativistic mean-field study of the properties ofZ=117nuclei and the decay chains of the293,294117 isotopes

2011

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“…We first solve the RHB equations using the most successful Lagrangian parameter set NL3 [22] and the Gogny D1S interaction [21] in the pairing channel. It is known that one of the characteristic features of a closed shell is the existence of a sharp maximum (close to zero) in the pairing energy curve.…”

Section: Relativistic Mean Field Theorymentioning

confidence: 99%

“…However for lower Z values the other decay modes particularly the alpha-decay with small branching ratios may gradually start to appear. It is interesting to note that the element 269 108 ( 271 106 ) has been produced [22] = 112 (110). The pairing energy then gradually increases (becomes more negative) with decreasing Z.…”

Section: N = 164mentioning

confidence: 99%

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The superheavy elements: overview

2009

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Superheavy Elements (SHE) up to Z = 118 have been produced and studied. The Relativistic Mean Field (RMF) theory provides a reasonably good description of the ground state properties (binding energies, Q-values, deformation, radii, densities etc.) of these elements. Shell closures revealed by the vanishing/ minimum pairing energy, are predicted for specific combination of neutron number N and proton number Z, specifically at N = 38, 164, 172, 184 and 198. Some of these have been confirmed experimentally. Future experiments are expected to validate the remaining predictions. Microscopic D-nucleus potential generated in the frame work of double folding model, employing the RMF densities for the daughter nucleus and the experimental densities for the D, along with the density dependent M3Y nucleon -nucleon interaction, qualitatively reproduce the experimental half lives for D -decay, calculated in the WKB approximation.

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“…α-nucleus interactions have been studied most intensively in the context of the α-decay of nuclei (see experimental information [4][5][6][7][8][9][10][11][12][13][14][15][16], various microscopic models [17][18][19][20][21][22][23][24][25][26][27][28][29][30], macroscopic cluster models [31][32][33][34][35][36][37][38][39][40][41][42][43][44], fission models [3,46]), and the scattering of the α-particles off nuclei [47][48][49][50][51]. The physics of the fusion processes during α-capture have been investigated less deeply …”

Section: Introductionmentioning

confidence: 99%

Quantum design using a multiple internal reflections method in a study of fusion processes in the capture of alpha-particles by nuclei

Maydanyuk¹,

Zhang²,

Belchikov³

2015

Nuclear Physics A

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A high precision method to determine fusion in the capture of α-particles by nuclei is presented. For α-capture by 40 Ca and 44 Ca, such an approach gives (1) the parameters of the α-nucleus potential and (2) fusion probabilities. This method found new parametrization and fusion probabilities and decreased the error by 41.72 times for α + 40 Ca and 34.06 times for α + 44 Ca in a description of experimental data in comparison with existing results. We show that the sharp angular momentum cutoff proposed by Glas and Mosel is a rough approximation, Wong's formula and the Hill-Wheeler approach determine the penetrability of the barrier without a correct consideration of the barrier shape, and the WKB approach gives reduced fusion probabilities. Based on our fusion probability formula, we explain the difference between experimental cross-sections for α+ 40 Ca and α+ 44 Ca, which is connected with the theory of coexistence of the spherical and deformed shapes in the ground state for nuclei near the neutron magic shell N = 20. To provide deeper insight into the physics of nuclei with the new magic number N = 26, the cross-section for α + 46 Ca is predicted for future experimental tests. The role of nuclear deformations in calculations of the fusion probabilities is analyzed.

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Nuclear Data Sheets for A = 266–294

Cited by 57 publications

References 122 publications

Relativistic mean-field study of the properties ofZ=117nuclei and the decay chains of the293,294117 isotopes

Relativistic mean-field study of the properties ofZ=117nuclei and the decay chains of the293,294117 isotopes

The superheavy elements: overview

Quantum design using a multiple internal reflections method in a study of fusion processes in the capture of alpha-particles by nuclei

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