scholarly journals Nuclear energy surfaces at high-spin in the A{approximately}180 mass region

1995 ◽  
Author(s):  
R R Chasman ◽  
J L Egido ◽  
L M Robledo
Keyword(s):  
High Spin ◽  
Nuclear Energy ◽  
Mass Region ◽  
Energy Surfaces

Resolving the Quadruple Bonding Conundrum in C2 Using Insights Derived from Excited State Potential Energy Surfaces: A Molecular Orbital Perspective

2019 ◽  
Author(s):  
Ishita Bhattacharjee ◽  
Debashree Ghosh ◽  
Ankan Paul
Keyword(s):  
Excited State ◽  
Potential Energy ◽  
Molecular Orbital ◽  
High Spin ◽  
Potential Energy Surfaces ◽  
Valence Bond ◽  
Deep Minimum ◽  
State Potential ◽  
Energy Surfaces ◽  
Mo Theory

The question of quadruple bonding in C<sub>2</sub> has emerged as a hot button issue, with opinions sharply divided between the practitioners of Valence Bond (VB) and Molecular Orbital (MO) theory. Here, we have systematically studied the Potential Energy Curves (PECs) of low lying high spin sigma states of C<sub>2</sub>, N<sub>2</sub> and Be<sub>2</sub> and HC≡CH using several MO based techniques such as CASSCF, RASSCF and MRCI. The analyses of the PECs for the<sup> 2S+1</sup>Σ<sub>g/u</sub> (with 2S+1=1,3,5,7,9) states of C<sub>2</sub> and comparisons with those of relevant dimers and the respective wavefunctions were conducted. We contend that unlike in the case of N<sub>2</sub> and HC≡CH, the presence of a deep minimum in the <sup>7</sup>Σ state of C<sub>2</sub> and CN<sup>+</sup> suggest a latent quadruple bonding nature in these two dimers. Hence, we have struck a reconciliatory note between the MO and VB approaches. The evidence provided by us can be experimentally verified, thus providing the window so that the narrative can move beyond theoretical conjectures.

Broken pairs and evolution of collectivity in theA≊140 mass region: High spin states of theNd7860138nucleus

1994 ◽  
Vol 49 (6) ◽  
pp. 2990-2999 ◽  
Author(s):  
G. de Angelis ◽  
M. A. Cardona ◽  
M. De Poli ◽  
S. Lunardi ◽  
D. Bazzacco ◽  
...  
Keyword(s):  
High Spin ◽  
Mass Region ◽  
Spin States ◽  
High Spin States

scholarly journals Interesting states in A = 10 mass region, populated in 10B + 10B nuclear reactions

2019 ◽  
Vol 223 ◽  
pp. 01027
Author(s):  
Deša Jelavić Malenica ◽  
Matko Milin ◽  
Alessia Di Pietro ◽  
Pierpaolo Figuera ◽  
Marcello Lattuada ◽  
...  
Keyword(s):  
High Spin ◽  
Nuclear Reactions ◽  
Mass Region ◽  
Point Of View ◽  
Spin States ◽  
High Spin States ◽  
Large Spin

The 10B+10B reactions are measured at beam energies of 50 and 72.2 MeV. The large spin of 10B nucleus (Jύ= 3+) makes this reaction particularly suitable to populate high spin states in the exit channels. Population and decay of different states in A≈10 mass region is studied, and the results are discussed from the structure point of view. In particular, a new state in 12C at Ex= 24.4 MeV is observed to be strongly populated in the triple α-particle coincidences.

Microscopic determination of energy surfaces at very high spin states

1977 ◽  
Vol 282 (3) ◽  
pp. 267-276 ◽  
Author(s):  
M. Ploszajczak ◽  
K. R. Sandhya Devi ◽  
Amand Faessler
Keyword(s):  
High Spin ◽  
Spin States ◽  
High Spin States ◽  
Energy Surfaces ◽  
Very High

Resolving the Quadruple Bonding Conundrum in C2 Using Insights Derived from Excited State Potential Energy Surfaces: A Molecular Orbital Perspective

2019 ◽  
Author(s):  
Ishita Bhattacharjee ◽  
Debashree Ghosh ◽  
Ankan Paul
Keyword(s):  
Excited State ◽  
Potential Energy ◽  
Molecular Orbital ◽  
High Spin ◽  
Potential Energy Surfaces ◽  
Valence Bond ◽  
Deep Minimum ◽  
State Potential ◽  
Energy Surfaces ◽  
Mo Theory

The question of quadruple bonding in C<sub>2</sub> has emerged as a hot button issue, with opinions sharply divided between the practitioners of Valence Bond (VB) and Molecular Orbital (MO) theory. Here, we have systematically studied the Potential Energy Curves (PECs) of low lying high spin sigma states of C<sub>2</sub>, N<sub>2</sub> and Be<sub>2</sub> and HC≡CH using several MO based techniques such as CASSCF, RASSCF and MRCI. The analyses of the PECs for the<sup> 2S+1</sup>Σ<sub>g/u</sub> (with 2S+1=1,3,5,7,9) states of C<sub>2</sub> and comparisons with those of relevant dimers and the respective wavefunctions were conducted. We contend that unlike in the case of N<sub>2</sub> and HC≡CH, the presence of a deep minimum in the <sup>7</sup>Σ state of C<sub>2</sub> and CN<sup>+</sup> suggest a latent quadruple bonding nature in these two dimers. Hence, we have struck a reconciliatory note between the MO and VB approaches. The evidence provided by us can be experimentally verified, thus providing the window so that the narrative can move beyond theoretical conjectures.

High spin states of Zr isotopes around A = 80 mass region — A study on cold and hot rotating nuclei

2019 ◽  
Vol 28 (11) ◽  
pp. 1950099
Author(s):  
Mamta Aggarwal ◽  
M. Kaushik ◽  
G. Saxena
Keyword(s):  
Low Temperature ◽  
High Temperatures ◽  
High Spin ◽  
Mass Region ◽  
Model Interaction ◽  
Hartree Fock ◽  
Prolate Shape ◽  
Good Accord ◽  
Increasing Temperature ◽  
Rotating Nuclei

High spin structure of Zr isotopes, in particular, around [Formula: see text] has been studied in yrast and nonyrast regions. Spin dependence of shapes for the yrast levels are investigated by employing Cranked Hartree–Fock–Bogoliubov (CHFB) theory using a [Formula: see text] model interaction and the calculations are in good accord with the experimental data. The nonyrast states are treated by incorporating temperature degree of freedom using the statistical theory (ST). Highly deformed prolate shapes dominate the nonrotating proton rich region at low temperatures (T) with coexisting oblate and prolate shapes in [Formula: see text]Zr. Hot rotating nuclei show highest deformation around [Formula: see text] among all the other Zr isotopes even at high temperatures. [Formula: see text]Zr exhibits interesting structural transitions, hence studied in detail in yrast and non yrast regions. Triaxiality predominates in both yrast and nearly yrast (low temperature) regions at low spins with transition to elongated shapes at mid spin values 30–38[Formula: see text] to highly deformed oblate shapes at higher spins. CHFB predicts a strong backbending effect at 32[Formula: see text] and 40[Formula: see text]. A shape coexistence between the rare shape phase of noncollective prolate and oblate is reported in [Formula: see text]Zr at low temperature and [Formula: see text]. Prolate shape phase disappears with increasing temperature and spin but the nucleus remains highly deformed (with [Formula: see text] at spin [Formula: see text]40[Formula: see text]) even at high temperatures of the order of 3–3.5[Formula: see text]MeV, hence a very promising candidate for GDR probes of nuclear shapes.

scholarly journals TERMINATING STATES AS A UNIQUE LABORATORY FOR TESTING NUCLEAR ENERGY DENSITY FUNCTIONAL

2007 ◽  
Vol 16 (02) ◽  
pp. 386-395 ◽  
Author(s):  
M. ZALEWSKI ◽  
W. SATUŁA
Keyword(s):  
Energy Density ◽  
Density Functional ◽  
Nuclear Energy ◽  
Correlation Energy ◽  
Rotational Symmetry ◽  
Mass Region ◽  
Energy Splitting ◽  
Energy Density Functional ◽  
Hartree Fock ◽  
Maximum Spin

Systematic calculations of favored signature maximum-spin Imax and unfavored signature Imax - 1 terminating states for [Formula: see text] and [Formula: see text] configurations (n denotes number of valence particles) in A~44 mass region are presented. Following the result of Zduńczuk et al., Phys. Rev. C58 (2005) 024305 the calculations are performed using Skyrme energy density functional with empirical Landau parameters and slightly reduced spin-orbit strength. The aim is to identify and phenomenologically restore rotational symmetry broken by the Skyrme-Hartree-Fock solutions. In particular, it is shown that correlation energy due to symmetry restoration is absolutely crucial in order to reproduce energy splitting E(Imax) - E(Imax - 1) in [Formula: see text] configurations but is relatively less important for [Formula: see text] configurations.

Nuclear High-Spin Spectroscopy in the A ∼ 60 Mass Region

2020 ◽  
pp. 253-277
Author(s):  
J. Gellanki ◽  
S. K. Mandal ◽  
Amritanshu Shukla
Keyword(s):  
High Spin ◽  
Mass Region
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