Intermediate-coupling structure of odd-A nuclei in the 2s–1d shell

1970 ◽  
Vol 48 (12) ◽  
pp. 1490-1498 ◽  
Author(s):  
B. Castel ◽  
K. W. C. Stewart ◽  
M. Harvey
Keyword(s):  
Coupling Model ◽  
Experimental Results ◽  
Energy Spectra ◽  
Positive Parity ◽  
Intermediate Coupling ◽  
Coupling Structure ◽  
Calculated Energy ◽  
Intermediate Coupling Model ◽  
Parameter Values

The positive parity energy spectra of 29Si, 31P, and 35Cl are calculated in terms of a modified intermediate-coupling model. The vibrating cores are assumed to be 28Si, 32S, and 36Ar respectively, with the 1d3/2, 2s1/2, and 1d5/2 orbits available to particle and hole states. Account is taken of the anharmonicity of the two-phonon core states. The calculated energy spectra and decay schemes are in agreement with recent experimental results with parameter values consistent with previous studies in the s–d shell.

Some Odd Z Nuclei in the 63 ≤ A ≤ 89 Mass Region in the Framework of the Intermediate Coupling Model

1971 ◽  
Vol 49 (13) ◽  
pp. 1750-1768 ◽  
Author(s):  
T. Paradellis ◽  
S. Hontzeas
Keyword(s):  
Experimental Data ◽  
Coupling Model ◽  
Negative Parity ◽  
Mass Region ◽  
Positive Parity ◽  
Intermediate Coupling ◽  
Intermediate Coupling Model ◽  
Quadrupole Term

The level structures of the nuclei 63Cu, 69Ga, 75As, 79Br, 83Rb, and 89Y are investigated in the framework of the unified model.Each nucleus is considered to consist of an even–even vibrating core and extra-core proton quasiparticle. The quasiparticle–core interaction Hamiltonian is assumed to be given by a dipole plus a quadrupole term. The coupling of a g9/2 state to the vibrating core leads to the formation of states of positive parity with [Formula: see text]. Such states with I up to 11/2+ have been recently observed in the nuclei under investigation. In the case of negative parity states the extra core proton quasiparticle is assumed to have available the p3/2, p1/2, and ƒ5/2 states. Many features of the investigated nuclei are explained by the model at least qualitatively. The present calculations do not exhaust the possibility of improved results. Future experimental data will be highly desirable not only for testing but also for improving the model.

scholarly journals Intermediate coupling model of the cuprates

2014 ◽  
Vol 63 (3) ◽  
pp. 151-266 ◽  
Author(s):  
Tanmoy Das ◽  
R.S. Markiewicz ◽  
A. Bansil
Keyword(s):  
Coupling Model ◽  
Intermediate Coupling ◽  
Intermediate Coupling Model

Decay of 143Eu

1974 ◽  
Vol 52 (10) ◽  
pp. 847-853 ◽  
Author(s):  
G. Kennedy ◽  
S. C. Gujrathi ◽  
P. F. Hinrichsen
Keyword(s):  
Ground State ◽  
Coupling Model ◽  
Intermediate Coupling ◽  
Ground State Spin ◽  
Reaction Data ◽  
Intermediate Coupling Model ◽  
Γ Rays ◽  
Γ Ray ◽  
State Spin ◽  
Good Agreement

A high resolution study of γ-ray transitions in 143Sm following the β+ decay of 143Eu has been made using Ge(Li) detectors. Fifty-seven γ rays are assigned to the decay of 143Eu, and the ground state spin of 143Eu is established as 5/2+. Spin and parity assignments are made on the basis of γ-ray branching, deduced log ft values, and by comparison with previous (p,d) reaction data. Good agreement between experiment and predictions of the intermediate coupling model suggests that this model adequately accounts for the low lying levels of 143Sm.

scholarly journals Energy Spectrum of 51V by the Intermediate Coupling Approach

1974 ◽  
Vol 27 (2) ◽  
pp. 289 ◽  
Author(s):  
Woon-Hyuk Chung
Keyword(s):  
Energy Spectrum ◽  
Shell Model ◽  
Strong Coupling ◽  
Energy Levels ◽  
Coupling Model ◽  
Intermediate Coupling ◽  
Rotational Model ◽  
Model Calculations ◽  
Coupling Approach ◽  
Intermediate Coupling Model

In recent years the nucleus 51 Y has been extensively studied, both experimentally by Horoshko et al. (1970), using the 48Ti(oc, py)51y reaction, and theoretically in terms of shell model calculations by many authors (McCullen et al. 1964; Horoshko et al. 1970; Lips and McEllistrem 1970). Mixed configuration shell model calculations by Lips and McEllistrem, in particular, have successfully reproduced the low-lying energy levels of5ly. However, strong coupling rotational model calculations by Malik and Scholz (1966) did not give satisfactory results. In the present work, the intermediate coupling unified model (Bohr and Mottelson 1953; Choudhury 1954) is applied to Sly. The purpose of this work is to show that the intermediate coupling model can successfully predict the low-lying energy levels of Sly.

THE 6.48-MEV LEVEL OF C11

1963 ◽  
Vol 41 (5) ◽  
pp. 784-792 ◽  
Author(s):  
D. W. Braben ◽  
P. J. Riley ◽  
G. C. Neilson
Keyword(s):  
Excited State ◽  
Ground State ◽  
State Transition ◽  
Time Of Flight ◽  
Coupling Model ◽  
Ground State Transition ◽  
Intermediate Coupling ◽  
Intermediate Coupling Model

The 6.48-Mev level of C11 has been studied by means of the B10(d,nγ)C11 reaction using time-of-flight techniques. The results show that the ratio of the ground-state transition to the cascade via the second excited state of C11 is 8 ± 1:1. Comparison is made with the predictions of the intermediate-coupling model.

scholarly journals Isospin in Be8

1966 ◽  
Vol 21 (7) ◽  
pp. 914-928 ◽  
Author(s):  
P. Paul
Keyword(s):  
Quantitative Description ◽  
Coulomb Force ◽  
Coupling Model ◽  
Experimental Information ◽  
Initial Energy ◽  
Intermediate Coupling ◽  
Good Quantum Number ◽  
Intermediate Coupling Model ◽  
The One ◽  
Similar Pair

Many experiments indicate that isospin is not a good quantum number for the states with Jπ=2+ at 16.6 MeV and 16.9 MeV in Be8. The available experimental information is examined and compared with a model of single particle states which are maximally mixed in isospin, as proposed by MARION. An analysis of all data pertinent to the states at 17.6 MeV and 18.15 MeV with Jπ=1+ shows that these states are rather pure (90%) isospin states. The state at 17.6 MeV has T=1, the one at 18.15 MeV hat T=0. Both the 2+ and the 1+ levels form doublets with similar wave functions in each case. A similar pair is most likely formed by the 3* states at 19.05 MeV and 19.22 MeV, as proposed by BARKER. Reduced widths indicate possible isospin mixing of as much as 30% for these states. Some experimental evidence is presented for another pair of states with Jπ=1- at 20.35 MeV and 22 MeV, and with Jπ=2- at 18.9 MeV and 23.6 MeV. This hypothesis provides analog states in Be8 for every state observed in Li8 in the energy region which is considered. If each pair (except the 1+ and 2+ pairs) is allowed to mix isospin by at most 30%, all cases of large excess of either neutron or proton reduced width can be explained. The large isospin mixture in the 2* pair can be explained on the basis of an initial energy degeneracy of these states (removed by the COULOMB force). The intermediate coupling shell model does account for such an accident. It is argued that, although a simple cluster picture of these states is highly successful in a qualitative way, the intermediate coupling model is able and probably needed to achieve a quantitative description of Be8 between 16 and 20 MeV.

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