Particle–rotor model interpretation of rotational features in 125I

2012 ◽  
Vol 90 (5) ◽  
pp. 413-424 ◽  
Author(s):  
Sadek Zeghib
Keyword(s):  
Negative Parity ◽  
Rotational Structure ◽  
Hole State ◽  
Model Calculations ◽  
Model Interpretation ◽  
First Time ◽  
Rotor Model

Most of the structure of 125I at low and medium energies has been successfully interpreted using a particle–rotor model. Rotational features similar to complete particle–core rotational multiplets have been identified for the first time especially for g7/2, d5/2 proton–particle orbitals. The model calculations show also that the rotational structure of the ΔJ = 1 band build on unusually low-lying g9/2 proton-hole state (9/2+ [404]) is naturally very well predicted and successfully described as well as other rotational features for negative parity states of h11/2 parentage along with the different observed ΔJ = 2 bands. Experimental energies and transition properties of previously observed positive and negative parity states of 125I, have been compared to those predicted by the model calculations considering a moderately deformed rotor.

Study of odd mass 115−125Sb isotopes with the projected shell model calculations

2017 ◽  
Vol 26 (06) ◽  
pp. 1750041 ◽  
Author(s):  
Dhanvir Singh ◽  
Arun Bharti ◽  
Amit Kumar ◽  
Suram Singh ◽  
G. H. Bhat ◽  
...  
Keyword(s):  
Shell Model ◽  
Transition Probabilities ◽  
Negative Parity ◽  
Yrast Band ◽  
Spin States ◽  
Projected Shell Model ◽  
Model Calculations ◽  
High Spin States ◽  
Reduced Transition Probabilities ◽  
First Time

The projected shell model (PSM) with the deformed single-particle states, generated by the standard Nilsson potential, is applied to study the negative-parity high spin states of [Formula: see text] nuclei. The nuclear structure quantities like band structure and back-bending in moment of inertia have been calculated with PSM method and are compared with the available experimental data. In addition, the reduced transition probabilities, i.e., B[Formula: see text] and B[Formula: see text], are also obtained for the yrast band of these isotopes for the first time by using PSM wave function. A multi-quasiparticle structure has been predicted for [Formula: see text] isotopes by the present PSM calculations.

Rotational structure of highly deformedY99: Particle-rotor model calculations

1985 ◽  
Vol 31 (2) ◽  
pp. 634-645 ◽  
Author(s):  
F. K. Wohn ◽  
John C. Hill ◽  
R. F. Petry
Keyword(s):  
Rotational Structure ◽  
Model Calculations ◽  
Rotor Model

Study of negative parity levels in 63Cu

1980 ◽  
Vol 58 (4) ◽  
pp. 472-480 ◽  
Author(s):  
R.G. Kulkarni ◽  
D. P. Navalkele
Keyword(s):  
Gamma Ray ◽  
Transition Probabilities ◽  
Negative Parity ◽  
Angular Distributions ◽  
Core Excitation ◽  
Model Calculations ◽  
Mixing Ratios ◽  
Reduced Transition Probabilities ◽  
Excitation Model ◽  
First Time

Low-lying negative parity levels in 63Cu were Coulomb excited with 3.25 to 4.25 MeV protons to test the weak coupling core-excitation model. A Ge(Li) detector was used to measure the gamma-ray yields. The 1412, 1547, and 1861 keV levels in 63Cu were Coulomb excited for the first time. Gamma-ray angular distributions were measured at 4.25 MeV proton energy in deducing multipole mixing ratios and spin values. The E2 and M1 reduced transition probabilities were determined for the six states. The 669.6, 962, 1327, and 1547 keV levels have properties consistent with the interpretation of coupling a 2p3/2 proton to the first 2+core state. The present results were compared with the available particle–core and particle–phonon model calculations.

Investigation of negative-parity states in 16C via deuteron inelastic scattering

2022 ◽  
Author(s):  
zhiwei Tan ◽  
Jian-Ling 楼建玲 Lou ◽  
Yan-Lin Ye ◽  
Yang Liu ◽  
Dan-Yang 庞丹阳 Pang ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Inverse Kinematics ◽  
Resonant State ◽  
Negative Parity ◽  
Angular Distributions ◽  
Model Calculations ◽  
Dwba Calculation ◽  
Knockout Reaction ◽  
Unbound States ◽  
First Time

Abstract Two low-lying unbound states in 16C are firstly investigated by the deuteron inelastic scattering in inverse kinematics. Besides the 2- state at 5.45-MeV previously measured in a 1n knockout reaction, a new resonant state at 6.89 MeV is observed for the first time. The inelastic scattering angular distributions of these two states are well reproduced by the distorted-wave Born approximation (DWBA) calculation with an l = 1 excitation. In addition, the spin-parities of the unbound states are discussed and tentatively assigned based on the shell model calculations using the modified YSOX interaction.

103Tc nuclear structure and systematic evolution of states of g9/2 parentage in odd-A 95, 97, 99, 101, 103Tc isotopes

2015 ◽  
Vol 93 (8) ◽  
pp. 862-870
Author(s):  
Sadek Zeghib
Keyword(s):  
Fermi Level ◽  
Nuclear Structure ◽  
Strong Coupling ◽  
Systematic Study ◽  
Negative Parity ◽  
Model Calculations ◽  
Rotational Bands ◽  
Complete Study ◽  
Systematic Evolution ◽  
Rotor Model

A systematic study of the evolution of the nuclear structure (at low and medium energies) of odd-A 95–103Tc isotopes is presented. These changes are indeed affected predominantly by changes in deformation and subsequently the position of the Fermi level. Hence a complete study of previously observed positive and negative parity states (at low and medium energies) of 103Tc in the framework of the particle–rotor model is performed. Experimental energies and transition properties will be compared to those predicted by the model calculations. The systematic model calculations show that those rotational “multiplets” emerging as a result of the larger Coriolis mixing, especially among positive-parity Nilsson states of g9/2 parentage in less deformed isotopes 95, 97, 99, 101Tc, are just as natural a prediction of the model as rotational bands built on states of good Ω in well deformed 103Tc (strong coupling) as confirmed experimentally.

Isopotential points in square-wave voltammetry of reversible electrode reactions

2009 ◽  
Vol 74 (10) ◽  
pp. 1489-1501 ◽  
Author(s):  
Marina Zelić ◽  
Milivoj Lovrić
Keyword(s):  
Square Wave Voltammetry ◽  
Electrode Reaction ◽  
Time Model ◽  
Model Calculations ◽  
Square Wave ◽  
Electrode Reactions ◽  
Wave Voltammetry ◽  
Electron Transfer Processes ◽  
Diagnostic Criterion ◽  
First Time

Isopotential points in square-wave voltammetry are described for the first time. Model calculations and real measurements (performed with UO22+ and Eu3+ in perchlorate and bromide solutions, respectively) indicate that such an intersection could be observed when backward components of the net response, resulting from an increase in frequency or reactant concentration, are presented together. The electrode reaction should be fully reversible because quasireversible or slower electron transfer processes give the isopoints only at increasing reactant concentrations but not at increasing square-wave frequencies. The effect could be used as an additional diagnostic criterion for recognition of reversible electrode reactions where products remain dissolved in the electrolyte solution.

Low-lying Negative-parity Levels of 17N and 18N

1984 ◽  
Vol 37 (1) ◽  
pp. 17 ◽  
Author(s):  
FC Barker
Keyword(s):  
Shell Model ◽  
Weak Coupling ◽  
Coupling Model ◽  
Negative Parity ◽  
Positive Parity ◽  
Model Calculations

On the basis of a weak-coupling model, adjustments are made to the interactions used in the full shell model calculations of Millener in order to fit the experimental energies of the low-lying negativeparity levels of 16N and of the low-lying positive-parity levels of 180 and 190 . The predicted energies of the low-lying negative-parity levels of 17N then agree better with experiment, while those for 18N lead to suggested spin assignments for the observed levels.

Theoretical calculations of electronic Raman effects of the NO and O2 molecules

1970 ◽  
Vol 48 (14) ◽  
pp. 1664-1674 ◽  
Author(s):  
D. W. Lepard
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Theoretical Calculations ◽  
Diatomic Molecules ◽  
Wave Functions ◽  
Rotational Structure ◽  
Intermediate Case ◽  
First Time

This paper presents a method for calculating the relative intensities and Raman shifts of the rotational structure in electronic Raman spectra of diatomic molecules. The method is exact in the sense that the wave functions used for the calculations may belong to any intermediate case of Hund's coupling schemes. Using this method, theoretical calculations of the pure rotational and electronic Raman spectrum of NO, and the pure rotational Raman spectrum of O2, are presented. Although a calculated stick spectrum for NO was previously shown by Fast et al., the details of this calculation are given here for the first time.

scholarly journals Large Scale Shell Model Calculations of the Negative-Parity States Structure in 24Mg Nucleus

2021 ◽  
Vol 66 (4) ◽  
pp. 293
Author(s):  
A.A. Al-Sammarraie ◽  
F.A. Ahmed ◽  
A.A. Okhunov
Keyword(s):  
Shell Model ◽  
Large Scale ◽  
Transition Probabilities ◽  
Transition Probability ◽  
Energy Levels ◽  
Form Factors ◽  
Model Space ◽  
Negative Parity ◽  
Matrix Elements ◽  
Model Calculations

The negative-parity states of 24Mg nucleus are investigated within the shell model. We are based on the calculations of energy levels, total squared form factors, and transition probability using the p-sd-pf (PSDPF) Hamiltonian in a large model space (0 + 1) hW. The comparison between the experimental and theoretical states showed a good agreement within a truncated model space. The PSDPF-based calculations successfully reproduced the data on the total squared form factors and transition probabilities of the negative-parity states in 24Mg nucleus. These quantities depend on the one-body density matrix elements that are obtained from the PSDPF Hamiltonian. The wave functions of radial one-particle matrix elements calculated with the harmonic-oscillator potential are suitable to predict experimental data by changing the center-of-mass corrections.

scholarly journals Parity partner bands in 163Lu: A novel approach for describing the negative parity states from a triaxial super-deformed band

2021 ◽  
pp. 2150033
Author(s):  
R. Poenaru ◽  
A. A. Raduta
Keyword(s):  
Band Structure ◽  
Present Model ◽  
Negative Parity ◽  
Rotational Bands ◽  
Parity Partner ◽  
Quantum Numbers ◽  
Novel Approach ◽  
Rotor Model ◽  
Classical Picture

The wobbling spectrum of [Formula: see text]Lu is described through a novel approach, starting from a triaxial rotor model within a semi-classical picture, and obtaining a new set of equations for all four rotational bands that have wobbling character. Redefining the band structure in the present model is done by adopting the concepts of Signature Partner Bands and Parity Partner Bands. Indeed, describing a wobbling spectrum in an even–odd nucleus through signature and parity quantum numbers is an inedited interpretation of the triaxial super-deformed bands.

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