Negative-parity rotational bands in179W

1973 ◽  
Vol 13 (2) ◽  
pp. 453-469 ◽  
Author(s):  
C. Birattari ◽  
A. M. Grassi Strini ◽  
G. Lo Bianco ◽  
G. Strini ◽  
G. Tagliaferri
Keyword(s):  
Negative Parity ◽  
Rotational Bands

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.

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 ROTATIONAL BANDS AND ELECTROMAGNETIC TRANSITIONS OF SOME EVEN–EVEN NEODYMIUM NUCLEI IN PROJECTED HARTREE–FOCK MODEL

2012 ◽  
Vol 21 (07) ◽  
pp. 1250070 ◽  
Author(s):  
S. K. GHORUI ◽  
P. K. RAINA ◽  
P. K. RATH ◽  
A. K. SINGH ◽  
Z. NAIK ◽  
...  
Keyword(s):  
Negative Parity ◽  
Electromagnetic Properties ◽  
Matrix Elements ◽  
Substantial Agreement ◽  
Projection Model ◽  
Model Calculations ◽  
Rotational Bands ◽  
Hartree Fock ◽  
Ground Band ◽  
Self Consistent

Rotational structures of even–even 150 – 160 Nd nuclei are studied with the self-consistent deformed Hartree–Fock (HF) and angular momentum (J) projection model. Spectra of ground band, recently observed K = 4-, K = 5- and a few more excited, positive and negative parity bands have been studied up to high spin values. Apart from these, detailed electromagnetic properties (like E2, M1 matrix elements) of all the bands have been obtained. There is substantial agreement between our model calculations and available experimental data. Predictions are made about the band structures and electromagnetic properties of these nuclei. Some 4-qasiparticle K-isomeric bands and their electromagnetic properties are predicted.

New features of positive and negative parity rotational bands in

2003 ◽  
Vol 720 (1-2) ◽  
pp. 43-59 ◽  
Author(s):  
A.A. Raduta ◽  
D. Ionescu ◽  
I.I. Ursu ◽  
Amand Faessler
Keyword(s):  
Negative Parity ◽  
Rotational Bands

Das Kernniveauschema von Yb 175

1971 ◽  
Vol 26 (3) ◽  
pp. 371-390 ◽  
Author(s):  
Dieter Breitig
Keyword(s):  
Level Scheme ◽  
Energy Region ◽  
Branching Ratios ◽  
Negative Parity ◽  
Coriolis Coupling ◽  
Rotational Bands ◽  
Band Mixing

Abstract The Yb174 (n,γ) -spectrum has been measured in the energy region of 26 -1500 keV. More than half of the observed 239 y-lines were placed in a level scheme. Precise energies have been determined for the states and their deexcitation has been studied in detail. New rotational bands, with the configurations { ([624 ↑]n + [512 ↑]n + [514 ↓]n)3/2 +[642 ↓]}, [651 ↓] and [642 ↓] are proposed at 1067, 1356 and 1937 keV. Calculations show that these bands strongly mix through Coriolis coupling. Additional and previously unknown states of the [624 ↑] and [633 ↑] bands are proposed. Level energies and y-branching ratios are explained reasonably well through a multi­ band mixing calculation of the configurations with negative parity.

STATIC AND DYNAMIC NON-AXIAL OCTUPOLE DEFORMATIONS SUGGESTED BY SKYRME-HF AND SELFCONSISTENT RPA CALCULATIONS

2004 ◽  
Vol 13 (01) ◽  
pp. 157-163 ◽  
Author(s):  
T. INAKURA ◽  
M. YAMAGAMI ◽  
K. MATSUYANAGI ◽  
S. MIZUTORI ◽  
H. IMAGAWA ◽  
...  
Keyword(s):  
Sulfur Isotopes ◽  
Three Dimensional ◽  
Negative Parity ◽  
Yrast Band ◽  
Rotational Bands ◽  
Hartree Fock ◽  
Mixed Representation ◽  
Vibrational Excitations ◽  
Symmetry Restriction ◽  
New Type

On the basis of the symmetry-unrestricted, cranked Skyrme-Hartree-Fock (SHF) calculations, we discuss superdeformed (SD) rotational bands in (1) the 40 Ca region along the N=Z line, and (2) neutron-rich Sulfur isotopes up to the neutron-drip line. The calculation was carried out with the use of the three-dimensional (3D) coordinate-mesh representation without imposing any symmetry restriction. Stability of the SD bands against exotic deformations breaking both reflection and axial symmetries were carefully examined. The analysis indicates possible appearance of negative-parity rotational bands associated with octupole shape vibrational excitations built on the SD yrast band. We then present results of selfconsistent RPA calculation for such a new type of collective vibrational modes. The selfconsistent RPA calculations based on the SD local minima obtained by the SHF calculation were carried out by means of the mixed representation on the 3D Cartesian mesh in a box.

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.

Study of rotational bands and electromagnetic properties of odd mass 153−159Eu

2017 ◽  
Vol 26 (06) ◽  
pp. 1750040 ◽  
Author(s):  
Rakesh K. Pandit ◽  
Barun Slathia ◽  
Rani Devi ◽  
S. K. Khosa
Keyword(s):  
Transition Probabilities ◽  
Magnetic Moments ◽  
Negative Parity ◽  
Energy Spectra ◽  
Electromagnetic Properties ◽  
Energy Bands ◽  
Projected Shell Model ◽  
Transition Energies ◽  
Rotational Bands ◽  
Good Agreement

Some positive and negative parity energy bands of odd-A isotopes of Europium [Formula: see text] have been studied within the Projected Shell Model (PSM) framework. Calculated excitation energy spectra, transition energies, E2 and M1 transition probabilities, quadrupole and magnetic moments are compared with experimental data wherever available. Reasonably good agreement is obtained with the observed data.

35C1 AND THE UNIFIED MODEL

1966 ◽  
Vol 44 (7) ◽  
pp. 1563-1572 ◽  
Author(s):  
P. Taras
Keyword(s):  
Excited State ◽  
Ground State ◽  
Negative Parity ◽  
Unified Model ◽  
Experimental Results ◽  
Positive Parity ◽  
Rotational Bands ◽  
The Third

The experimental results obtained for 35Cl are interpreted in terms of the unified model. Members of live rotational bands can be identified. The band based on the ground state can be assigned K = 3/2 and positive parity. Of the three excited-state bands, two have positive parity and K = 1/2, while the third one has negative parity and K = 7/2.

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