ROTATIONAL STATES IN DEFORMED EVEN–EVEN NUCLEI

1967 ◽  
Vol 45 (11) ◽  
pp. 3521-3532 ◽  
Author(s):  
Raj K. Gupta
Keyword(s):  
Energy Levels ◽  
Spin States ◽  
Coupling Constant ◽  
Rotational States ◽  
Rotational Bands ◽  
High Spin States ◽  
Oscillator Type ◽  
The Moment ◽  
Vibration Coupling ◽  
Good Agreement

The deviations from the simple I(I + 1) dependence of the energy levels in the ground-state rotational bands on the hydrodynamical model of Bohr and Mottelson have been investigated for both regions of stable deformation. An interpretation of high spin states is looked for in terms of a nonrigid rotator with vibrations (harmonic oscillator type) taken as perturbation. In the framework of this model, the energy expression is obtained as a power series in the product of the ratio B/A and the weight factor I(I + 1), where A is related to the moment of inertia and B is the rotation–vibration coupling constant. The calculations are shown to be in good agreement with the experimental data.

Study of High-spin States for 90,91,92Y Isotopes by Using Oxbash Code

2021 ◽  
Vol 14 (1) ◽  
pp. 25-33
Keyword(s):  
Experimental Data ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Model Space ◽  
Low Energy ◽  
Energy Spectra ◽  
Spin States ◽  
Nuclear Shell Model ◽  
High Spin States ◽  
Nuclear Shell

Abstract: In this paper, calculations of 90,91,92Y isotopes have been performed by application of nuclear shell model in the Gloeckner (Gl) model space for two different interactions (Gloeckner (Gl) and Gloeckner pulse bare G-Matrix (Glb) using Oxbash code. The energy levels are compared and discussed with experimental data and based on our results, many predictions about spins and parity were observed between experimental states, in addition to the predictions of low-energy spectra and B (E2; ↓) and B (M1; ↓)) transitional strengths in the isotopes 90,91,92Y. These predictions were not known in the experimental data. Keywords: Energy levels, Transition probabilities, Oxbash code.

Semiclassical description of high-spin states in rotational bands

1973 ◽  
Vol 45 (5) ◽  
pp. 417-420 ◽  
Author(s):  
P. Thieberger
Keyword(s):  
High Spin ◽  
Spin States ◽  
Rotational Bands ◽  
High Spin States

High-spin states of rotational bands built upon νi13/2 in 166Lu

2000 ◽  
Vol 8 (1) ◽  
pp. 1-3 ◽  
Author(s):  
C. S. Lee ◽  
J. H. Ha ◽  
J. H. Lee ◽  
J. Y. Huh ◽  
J. C. Kim ◽  
...  
Keyword(s):  
High Spin ◽  
Spin States ◽  
Rotational Bands ◽  
High Spin States

HIGH SPIN STATES IN 184Pt AND 172W NUCLIDES AND CORE EXCITATION IN IBA CALCULATION

1987 ◽  
Vol 02 (10) ◽  
pp. 715-719
Author(s):  
S. T. HSIEH ◽  
M. M. KING YEN
Keyword(s):  
High Spin ◽  
Energy Levels ◽  
Structure Change ◽  
Interacting Boson Model ◽  
Spin States ◽  
Quadrupole Moments ◽  
Core Excitation ◽  
High Spin States ◽  
The Core ◽  
Boson Model

The core-excited interacting boson model up to two boson excitation is applied to 184 Pt and 172 W nuclides. In addition to energy levels (backbending), the calculated transition quadrupole moments of 172 W also reproduces the experimentally observed behavior, namely, a reduction at high spin. Incidentally a structure change between the lighter and the heavier Pt isotopes manifests itself in the study.

Theoretical and experimental study of infrared spectra of He2-CO2This article is part of a Special Issue on Spectroscopy at the University of New Brunswick in honour of Colan Linton and Ron Lees.

2009 ◽  
Vol 87 (5) ◽  
pp. 417-423 ◽  
Author(s):  
Jian Tang ◽  
A. R.W. McKellar ◽  
Xiao-Gang Wang ◽  
Tucker Carrington
Keyword(s):  
Energy Levels ◽  
Supersonic Jet ◽  
Rotational States ◽  
Vibrational Ground State ◽  
Supersonic Jet Expansion ◽  
Theoretical Line ◽  
The University ◽  
Line Positions ◽  
Good Agreement ◽  
Pulsed Supersonic Jet

Additional high-resolution lines in the ν3 CO2 fundamental band of the rovibrational spectrum of He2-CO2 have been observed using a tunable infrared laser to probe a pulsed supersonic jet expansion. The ro-vibrational spectrum was calculated using Euler angles and five vibrational coordinates that specify the positions of the He atoms with respect to the CO2 molecule, a product basis, and a Lanczos eigensolver. Rotational states with J = 0, 1, 2, and 3 associated with the vibrational ground state and different states (νt) of the torsional motion of the two He atoms about the CO2 axis are identified and assigned. The assignment is consistent with having different principle axis orientiations in νt = 0 and νt = 1 states. Δνt = 1 infrared transistions are forbidden due to the symmetry of CO2, but Δνt = 1 microwave transistions are possible. Theoretical line positions and intensities are predicted. Good agreement between experiment and theory was obtained. The calculated energy levels and intensities were crucial in assigning some of the weaker observed transitions.

High-Spin States inNe20and Their Possible Classification into Rotational Bands

1972 ◽  
Vol 5 (6) ◽  
pp. 1995-2006 ◽  
Author(s):  
A. D. Panagiotou ◽  
H. E. Gove ◽  
S. Harar
Keyword(s):  
High Spin ◽  
Spin States ◽  
Rotational Bands ◽  
High Spin States

scholarly journals High spin structure of 155Dy

2019 ◽  
Vol 3 ◽  
pp. 114
Author(s):  
C. T. Papadopoulos ◽  
R. Vlastou ◽  
M. Serris ◽  
C. A. Kalfas ◽  
N. Fotiades ◽  
...  
Keyword(s):  
High Spin ◽  
Beam Energy ◽  
Spin Structure ◽  
Negative Parity ◽  
Spin States ◽  
Detailed Structure ◽  
Strongly Coupled ◽  
Rotational Bands ◽  
High Spin States ◽  
Coincidence Measurements

High spin states in 155Dy have been studied by γ-γ coincidence measurements via the 124Sn(36S, 5n)155Dy reaction at a beam energy of 155 MeV. Eight rotational bands have been populated and observed up to high spin (I<91/2).The band features have been analysed within the framework of the cranked shell model. The Ì13/2 neutron alignments and the h11/2 proton alignments are discussed. B(M1)/B(E2) ratios have also been extracted for the strongly coupled bands to deduce further information on the detailed structure of these bands. For the highest states (above spin 30) of the negative parity bands an irregularity in y-ray energies appears which is discussed in terms of band termination.

scholarly journals Energy levels and radiative transitions of the core-excited high-spin states in boron atom (ion)

2017 ◽  
Vol 66 (12) ◽  
pp. 123101
Author(s):  
Qian Xin-Yu ◽  
Sun Yan ◽  
Liu Dong-Dong ◽  
Hu Feng ◽  
Fan Qiu-Bo ◽  
...  
Keyword(s):  
Boron Atom ◽  
High Spin ◽  
Energy Levels ◽  
Spin States ◽  
High Spin States ◽  
The Core ◽  
Radiative Transitions

Angular Distribution Studies for 65Zn Nuclei from 63Cu (α, pnγ) Reaction Using Constant Statistical Tensor, Least Square Fitting and σ/J Methods

2021 ◽  
Vol 19 (1) ◽  
pp. 30-37
Author(s):  
Taghreed A. Younis
Keyword(s):  
Least Square ◽  
Spin States ◽  
Least Square Fitting ◽  
Mixing Ratios ◽  
High Spin States ◽  
Multiple Mixing ◽  
Statistical Tensor ◽  
Distribution Studies ◽  
Experimental Values ◽  
Good Agreement

Multiple mixing ratios (δ-values) have been calculated for high-spin states excited in 29𝐶𝑢 63 (α,pnγ) 𝑍𝑛 30 65 in present work using constant statistical tensor (CST), least square fitting (LSF) and σ/J methods together with experimental values reported for such γ-transition the good agreement for (δ-values) calculated in these three methods confirms its validity to calculate the (δ-values) for γ-transition.

Study of high spin states in 149Tb observed by the (10B,3n) reaction

1979 ◽  
Vol 57 (11) ◽  
pp. 1959-1968 ◽  
Author(s):  
N. C. Singhal ◽  
M. W. Johns ◽  
J. V. Thompson
Keyword(s):  
High Spin ◽  
Energy Levels ◽  
Negative Parity ◽  
Positive Parity ◽  
Angular Distributions ◽  
Spin States ◽  
Core Nucleus ◽  
High Spin States ◽  
Parity Band ◽  
Positive Parity Band

Energy levels in 149Tb have been studied by the 142Nd (10B,3n) reaction using 54 MeV 10B beams from the McMaster University FN accelerator. Excitation functions, angular distributions, prompt γ–γ coincidence, electron conversion, and linear polarization measurements were obtained. On the basis of these measurements we have identified two rotaition-aligned πh11/2 bands, a negative parity band up to spin 27/2−, and a positive parity band up to spin 27/2+. The energy spacings between levels in these bands strongly resemble those in the ground state and the 3− octupole band of the adjacent 148Gd core nucleus. Other high spin positive parity states up to spin of 41/2 are also observed. These high spin states show some evidence of rotational structure in 14 9Tb.

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