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

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.

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105Tc nuclear structure and systematic evolution of states of 1/2+[431] intruder band in odd-A 95, 97,99,101,103,105,107Tc isotopes

Canadian Journal of Physics ◽

10.1139/cjp-2020-0008 ◽

2020 ◽

Author(s):

Sadek ZEGHIB

Keyword(s):

Experimental Investigation ◽

Fermi Level ◽

Nuclear Structure ◽

Rotational Model ◽

Model Calculations ◽

Rotational Bands ◽

Systematic Evolution ◽

Intruder Orbital ◽

Model Transition ◽

Rotor Model

Previously observed negative and positive parity states of 105Tc were studied in the framework of particle-rotor model. Transition properties and experimental energies were compared to the predictions of the model calculations. A systematic study of the evolution of the intruder π1/2+[413] band in the nuclear structure of odd-A Technetium isotopes 95,97,99,101,103,105,107Tc is presented as well. The existence of this intruder band has been argued previously in 95,97,99,101,103Tc isotopes (partially populated) and fully observed and confirmed in 105Tc. It will be shown that changes in deformation and subsequently the position of Fermi level vis a vis the 1/2+[431] intruder orbital originating from the π (d5/2, g7/2) subshells predominantly affect these systematic changes. All four interpreted experimental rotational bands are naturally predicted by the rotational model as bands build on states of good Ω originating from 5/2+[422], 5/2-[303], 3/2-[301] and 1/2+[431] orbitals near the Fermi level in deformed 105Tc (strong coupling). Further experimental investigation about missing data is needed for those observed low lying states in both 105Tc and 103Tc in order to confirm the presence of the 1/2-[301] rotational band that is well defined in lighter 95,97,99,101Tc isotopes.

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

International Journal of Modern Physics E ◽

10.1142/s0218301321500336 ◽

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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Particle–rotor model interpretation of rotational features in 125I

Canadian Journal of Physics ◽

10.1139/p2012-034 ◽

2012 ◽

Vol 90 (5) ◽

pp. 413-424 ◽

Cited By ~ 1

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.

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

International Journal of Modern Physics E ◽

10.1142/s021830131250070x ◽

2012 ◽

Vol 21 (07) ◽

pp. 1250070 ◽

Cited By ~ 2

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.

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

Australian Journal of Physics ◽

10.1071/ph840017 ◽

1984 ◽

Vol 37 (1) ◽

pp. 17 ◽

Cited By ~ 14

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.

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Strong coupling and quasispinor representations of the SU(3) rotor model

Nuclear Physics A ◽

10.1016/0375-9474(92)90211-2 ◽

1992 ◽

Vol 542 (2) ◽

pp. 173-194 ◽

Cited By ~ 10

Author(s):

D.J. Rowe ◽

H. de Guise

Keyword(s):

Strong Coupling ◽

Rotor Model

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

Ukrainian Journal of Physics ◽

10.15407/ujpe66.4.293 ◽

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.

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SHAPE EVOLUTION OF HIGHLY DEFORMED 75Kr AND PROJECTED SHELL MODEL DESCRIPTION

International Journal of Modern Physics E ◽

10.1142/s0218301310016181 ◽

2010 ◽

Vol 19 (08n09) ◽

pp. 1754-1762 ◽

Cited By ~ 2

Author(s):

YING-CHUN YANG ◽

YANG SUN ◽

T. TRIVEDI ◽

R. PALIT ◽

J. A. SHEIKH

Keyword(s):

Shell Model ◽

Negative Parity ◽

Model Description ◽

Shape Evolution ◽

Quadrupole Moments ◽

Projected Shell Model ◽

Model Calculations ◽

High Spin States ◽

Parity Band ◽

Insight Into

A study of recently-measured high spin states of 75 Kr is carried out by using the Projected Shell Model. Calculations are performed up to spin I = 33/2 for the positive parity band and I = 27/2 for the negative parity band. Irregularities found in moment of inertia and in the deduced transition quadrupole moments Q t of the two bands are discussed in terms of the alignment of g 9/2 protons. Our study provides an insight into the shape evolution of the well-deformed nucleus 75 kr .

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