STRUCTURE OF ODD 79,81,83Se ISOTOPES WITH PROTON AND NEUTRON EXCITATIONS ACROSS Z = 28 AND N = 40

2013 ◽  
Vol 22 (12) ◽  
pp. 1350091 ◽  
Author(s):  
VIKAS KUMAR ◽  
P. C. SRIVASTAVA
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Magnetic Moments ◽  
Effective Interaction ◽  
Quadrupole Moments ◽  
Excitation Energies ◽  
Valence Space

The recently measured experimental data of 79,81,83 Se isotopes have been interpreted in terms of shell model (SM) calculations. The calculations have been performed in f5/2pg9/2 space with the recently derived interactions, namely JUN45 and jj44b. To study the importance of the proton excitations across the Z = 28 shell in this region, we have also performed calculation in fpg9/2 valence space using an fpg effective interaction with 48 Ca core and imposing a truncation. Excitation energies, B(2) values, quadrupole moments and magnetic moments are compared with the experimental data available. Present study reveals the importance of proton excitations across the Z = 28 shell for predicting quadrupole and magnetic moments.

Energy Levels of 50Ca Nucleus as a Function of the Classical Coupling Angle within MSDI

2021 ◽  
Vol 19 (5) ◽  
pp. 61-67
Author(s):  
Ali Khalaf Hasan ◽  
Dalal Naji Hameed
Keyword(s):  
Experimental Data ◽  
Angular Momentum ◽  
Shell Model ◽  
Energy Levels ◽  
Model Space ◽  
Closed Shell ◽  
Excitation Energies ◽  
Modified Surface ◽  
Coupling Angle ◽  
Surface Delta Interaction

In the construction of this kind of shell model, we take the residual interaction to be modified surface delta interaction MSDI. We have studied the excitation energies of the 50Ca a nucleus, which contain two neutrons outside closed shell of the 48Ca. Neutrons are in the model space pfpg. The energy levels and angular momentum of all possible cases were investigated. Thereby, we have effectively utilized a theoretical process to find link among the traditional coupling angle and energy levels at different orbital within neutron - neutron interaction. We observe the energy stages appear to follow two overall functions which depend on the classical coupling angles but are unconstrained of angular momentum I. We find out that our results agree with the experimental data.

scholarly journals Self-consistent account for phonon induced corrections to quadrupole moments of odd nuclei. Pole and non-pole diagrams.

2018 ◽  
Vol 182 ◽  
pp. 02109
Author(s):  
E. E. Saperstein ◽  
S. Kamerdzhiev ◽  
D. S. Krepish ◽  
S. V. Tolokonnikov ◽  
D. Voitenkov
Keyword(s):  
Experimental Data ◽  
Magnetic Moments ◽  
Lead Isotopes ◽  
The Self ◽  
Quadrupole Moments ◽  
Important Ingredient ◽  
Consistent Theory ◽  
Fermi Systems ◽  
Consistent Model ◽  
Self Consistent

Recent results of the description of quadrupole moments of odd semi-magic nuclei are briefly reviewed. They are based on the self-consistent theory of finite Fermi systems with account for the phonon-particle coupling (PC) effects. The self-consistent model for describing the PC effects was developed previously for magnetic moments. Account for the non-pole diagrams is an important ingredient of this model. In addition to previously reported results for the odd In and Sb isotopes, which are the proton-odd neighbors of even tin nuclei, we present new results for odd Bi isotopes, the odd neighbors of even lead isotopes. In general, account for the PC corrections makes the agreement with the experimental data significantly better.

AB INITIO NUCLEAR STRUCTURE CALCULATIONS OF p-SHELL NUCLEI WITH JISP16

2013 ◽  
Vol 22 (07) ◽  
pp. 1330016 ◽  
Author(s):  
PIETER MARIS ◽  
JAMES P. VARY
Keyword(s):  
Ab Initio ◽  
Magnetic Moments ◽  
Nucleon Nucleon ◽  
Quadrupole Moments ◽  
Nucleon Interaction ◽  
Excitation Energies ◽  
Nucleon Nucleon Interaction ◽  
Nuclear Structure Calculations ◽  
Structure Calculations ◽  
Ground State Energies

We review energies and magnetic moments of p-shell nuclei obtained with the ab initio No-Core Full Configuration (NCFC) approach using the JISP16 realistic nucleon–nucleon interaction. We present calculated ground state energies for all stable p-shell nuclei and selected unstable isotopes, as well as their magnetic moments. We also review excitation energies for narrow resonances of A = 6 to 9 nuclei. We compare our results with experimental data and with other ab initio calculations, where available. We illustrate how the decomposition of total angular momentum into intrinsic spin and orbital components provides insights into the structure of states and relationships among states. We illustrate the challenges of obtaining converged results for radii, quadrupole moments and B(E2) values.

scholarly journals Core-polarization effect in longitudinal electron scattering form factors of 65Cu nucleus

2019 ◽  
Vol 14 (31) ◽  
pp. 13-27
Author(s):  
Adie D. Salman
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Electron Scattering ◽  
Transition Probabilities ◽  
Effective Interaction ◽  
Form Factors ◽  
Model Space ◽  
Inelastic Electron ◽  
Core Polarization ◽  
Reduced Transition Probabilities

Inelastic longitudinal electron scattering form factors to 2+ and 4+ states in 65Cu nucleus has been calculated in the (2p3/2 1f 5/2 2p1/2) shell model space with the F5PVH effective interaction. The harmonic oscillator potential has been applied to calculate the wave functions of radial single-particle matrix elements. Two shell model codes, CP and NUSHELL are used to obtain results. The form factor of inelastic electron scattering to 1/21−, 1/22−, 3/22−, 3/23−, 5/21−, 5/22− and 7/2- states and finding the transition probabilities B (C2) (in units of e2 fm4) for these transitions and B (C4) (in units of e2 fm8) for the transition 7/2-, and comparing them with experimental data. Both the form factors and reduced transition probabilities with core-polarization effects gave a reasonable description of the experimental data.

scholarly journals Study of the Nuclear Structure of some Neutron Rich Si Isotopes Using Shell Model with Skyrme Interaction

2021 ◽  
Vol 19 (48) ◽  
pp. 89-106
Author(s):  
Luma Jamal Abbas ◽  
Ali A. Alzubadi
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Nuclear Structure ◽  
Dynamic Properties ◽  
Transition Probability ◽  
Effective Interaction ◽  
Binding Energies ◽  
Neutron Skin ◽  
Static Properties ◽  
Si Isotopes

  Abstract       The nuclear structure of 28-40Si isotopes toward neutron dripline has been investigated in framework of shell model with Skyrme-Hrtree-Fock method using certain Skyrme parameterizations. Moreover, investigations of static properties such as nuclear densities for proton, neutron, mass, and, charge densities with their corresponding rms radii, neutron skin thicknesses, binding energies, separation energies, shell gap, and pairing gap have been performed using the most recent Skyrme parameterization. The calculated results have been compared with available experimental data to identify which of these parameterizations introduced equivalent results with the experimental data. For all dynamic properties, sdpf shell model space has been used to generate one body transition density matrix element with SDPFK two body effective interaction. The calculations also reproduced the low and higher-laying 2+ energy level scheme, and reduced transition probability B(E2) for even Si-isotopes.

scholarly journals Study of the properties of Ru-isotopes using the proton-neutron interacting boson model (IBM-2)

2010 ◽  
Vol 7 (1) ◽  
pp. 76-89
Author(s):  
Baghdad Science Journal
Keyword(s):  
Experimental Data ◽  
Dipole Moments ◽  
Electric Quadrupole ◽  
Mass Region ◽  
Interacting Boson Model ◽  
State Transitions ◽  
Quadrupole Moments ◽  
Excitation Energies ◽  
Mixing Ratios ◽  
Boson Model

The proton-neutron interacting boson model (IBM-2) has been used to make a schematic study of the Ruthenium ( ) isotopes of mass region around with and . For each isotope of the values of the IBM-2 Hamiltonian parameters, which yield an acceptable results for excitation energies in comparison with those of experimental data, have been determined. Fixed values of the effective charges ( ) and of the proton and neutron g factors ( and ) have been chosen for all isotopes under study. The calculated electric quadrupole moments of state, transitions, the magnetic dipole moments transitions and mixing ratios are in reasonable agreement with the experimental data.

scholarly journals Spin-tensor decomposition: A useful tool for shell model effective interaction

2019 ◽  
Vol 223 ◽  
pp. 01029
Author(s):  
Pawan Kumar ◽  
Shahariar Sarkar ◽  
Pushpendra .P Singh ◽  
P. K. Raina
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Single Particle ◽  
Effective Interaction ◽  
Tensor Decomposition ◽  
Spin Tensor ◽  
Good Agreement ◽  
Calculated Level

The spin-tensor decomposition is employed to construct a new interaction, named CKHeN, for 0p-shell. This new interaction is used to calculate the ekective single-particle energies of π0p1/2 and π0p1/2orbitals in Li isotopes, and the level structures of 7,8,9Li isotopes. The calculated level structures are found in good agreement with experimental data.

scholarly journals Energy Levels of Isobaric Nuclei (16N, 16F) within the Modified Surface Delta-Interaction Model

2018 ◽  
Vol 63 (7) ◽  
pp. 579 ◽  
Author(s):  
D. N. Hameed ◽  
A. K. Hasan
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Energy Levels ◽  
Interaction Model ◽  
Excitation Energies ◽  
Modified Surface ◽  
Good Agreement ◽  
Surface Delta Interaction

The modified surface delta-interaction model is applied to calculate the energy levels of 16N and 16F) nuclei. The good agreement between theoretical and experimental data is attained for excitation energies. This indicates that the shell model describes properly the structure of these nuclei.

NUMBER-PROJECTED QUASIPARTICLE PHONON COUPLING APPLIED TO ODD-MASS Te ISOTOPES

1995 ◽  
Vol 04 (02) ◽  
pp. 419-429 ◽  
Author(s):  
C.A.P. CENEVIVA ◽  
L. LOSANO ◽  
H. DIAS
Keyword(s):  
Experimental Data ◽  
Nuclear Structure ◽  
Particle Number ◽  
Coupling Model ◽  
Quadrupole Moments ◽  
Phonon Coupling ◽  
Excitation Energies

The structure of low-lying levels in odd-mass Te isotopes (115≤A≤131) is examined in the framework of the projected-quasiparticle-phonon coupling model (PQPC). Effects of particle number symmetry restoration are discussed through the comparison with usual quasiparticle phonon coupling calculations (QPC). Excitation energies, dipole and quadrupole moments are calculated and compared with the experimental data. Nuclear Structure: 115−131 Te ; calculated levels J, π, S, μ, and Q. Number-projected quasiparticle-phonon coupling.

Energy Levels and Electromagnetic Transition of 90-94mo Nuclei Using Ibm-1

2020 ◽  
pp. 149-152
Keyword(s):  
Experimental Data ◽  
Transition Probability ◽  
Energy Levels ◽  
Dynamical Symmetry ◽  
Interacting Boson Model ◽  
Excitation Energies ◽  
Electromagnetic Transition ◽  
Boson Model ◽  
Energy States ◽  
Good Agreement

The energy states for the J , b , ɤ bands and electromagnetic transitions B (E2) values for even – even molybdenum 90 – 94 Mo nuclei are calculated in the present work of "the interacting boson model (IBM-1)" . The parameters of the equation of IBM-1 Hamiltonian are determined which yield the best excellent suit the experimental energy states . The positive parity of energy states are obtained by using IBS1. for program for even 90 – 94 Mo isotopes with bosons number 5 , 4 and 5 respectively. The" reduced transition probability B(E2)" of these neuclei are calculated and compared with the experimental data . The ratio of the excitation energies of the 41+ to 21+ states ( R4/2) are also calculated . The calculated and experimental (R4/2) values showed that the 90 – 94 Mo nuclei have the vibrational dynamical symmetry U(5). Good agreement was found from comparison between the calculated energy states and electric quadruple probabilities B(E2) transition of the 90–94Mo isotopes with the experimental data .

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