STRUCTURE OF INTRUDER STATES

1992 ◽  
Vol 01 (02) ◽  
pp. 339-362 ◽  
Author(s):  
G. E. ARENAS PERIS
Keyword(s):  
Experimental Data ◽  
Weak Coupling ◽  
Coupling Model ◽  
Matrix Elements ◽  
Proton Interaction ◽  
Consistent Method ◽  
Free Parameters ◽  
Intruder States

Nuclear intruder states are described in terms of a weak-coupling model which permits to extract important information from experimental data. The monopole neutron–proton interaction plays a fundamental role in the energy systematics of these states and a model consistent method to obtain its matrix elements from experiment has been developed. Calculations without free parameters were performed for a large variety of excitations throughout the Nuclide Chart. The agreement with experiment is quite satisfactory.

HOUSEHOLDER TRANSFORMATION IN THE INVERSE PROBLEM FOR A COMPLEX VIBRONIC ANALOGUE OF THE FERMI RESONANCE

2021 ◽  
Vol 88 (6) ◽  
pp. 845-851
Author(s):  
V. A. Kuzmitsky
Keyword(s):  
Experimental Data ◽  
Inverse Problem ◽  
Similarity Transformation ◽  
Coupling Model ◽  
Fermi Resonance ◽  
Matrix Elements ◽  
Householder Transformation ◽  
Rotational Spectra ◽  
Reflection Matrix ◽  
The Matrix

In the inverse problem for a complex vibronic analogue of the Fermi resonance, the matrix elements of the electron-vibration interaction should be obtained from experimental data, energies Ek and intensities Ik (k = 1, 2, …, n; n ≥ 3), a “conglomerate” of lines in the spectrum. This problem in the direct-coupling model, where the Hamiltonian HDIR is specified by the energies of the “dark” states Ai and the matrix elements of their coupling with the “bright” state Bi (i = 1, 2, …, n –1), was solved by the author on the basisof algebraic methods. It is shown that the Hamiltonian HDW of the doorway-coupling model, in which the “bright” state has “interaction” with only single distinguished |DW> state, can be obtained from the Hamiltonian HDIR using the Householder triangularization method, namely, by the similarity transformation HDW = PHDIRP, where P is the reflection matrix which is constructed from the Bi values. The expressions for main elements of the doorway model, namely, the energy of the |DW> state and the matrix element of its coupling with the "bright" state, are obtained. For pyrazine and acetylene molecules, the matrix elements of the Hamiltonian HDW are calculated using the data of the electronic-vibrational-rotational spectra.

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

1984 ◽  
Vol 37 (1) ◽  
pp. 17 ◽  
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.

Carrier tunneling in nanocrystalline silicon–silicon dioxide superlattices: A weak coupling model

2004 ◽  
Vol 69 (23) ◽  
Author(s):  
B. V. Kamenev ◽  
G. F. Grom ◽  
D. J. Lockwood ◽  
J. P. McCafrey ◽  
B. Laikhtman ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Weak Coupling ◽  
Coupling Model ◽  
Nanocrystalline Silicon ◽  
Carrier Tunneling ◽  
Silicon Silicon

scholarly journals Predictions for boson-jet observables and fragmentation function ratios from a hybrid strong/weak coupling model for jet quenching

2016 ◽  
Vol 2016 (3) ◽  
Author(s):  
Jorge Casalderrey-Solana ◽  
Doga Can Gulhan ◽  
José Guilherme Milhano ◽  
Daniel Pablos ◽  
Krishna Rajagopal
Keyword(s):  
Fragmentation Function ◽  
Weak Coupling ◽  
Coupling Model ◽  
Jet Quenching ◽  
Jet Observables

Application of the unified weak-coupling model to neutron scattering byC12

1977 ◽  
Vol 16 (1) ◽  
pp. 76-79 ◽  
Author(s):  
J. E. Purcell ◽  
M. R. Meder
Keyword(s):  
Neutron Scattering ◽  
Weak Coupling ◽  
Coupling Model

Weak-Coupling Model forPb212andPb204

1973 ◽  
Vol 8 (6) ◽  
pp. 2379-2389 ◽  
Author(s):  
C. M. Ko ◽  
T. T. S. Kuo ◽  
J. B. McGrory
Keyword(s):  
Weak Coupling ◽  
Coupling Model

New physics through interference of nonstandard interactions with Standard Model in rare decays of Bc+ meson

2018 ◽  
Vol 33 (30) ◽  
pp. 1850171
Author(s):  
Shakeel Mahmood ◽  
Farida Tahir ◽  
Azeem Mir
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Rare Decays ◽  
New Physics ◽  
Final State ◽  
Neutrino Interactions ◽  
Bc Meson ◽  
Free Parameters

We investigate the nonstandard neutrino interactions (NSI) in the rare decays of [Formula: see text] mesons involving neutrinos in the final state. It is suggested that the interference between Standard Model and nonstandard interaction can provide sizeable contribution. We calculate the limits on NSI free parameters ([Formula: see text], [Formula: see text]) and compare them with experimental data.

scholarly journals Study of sub-barrier fusion of 36S+50Ti,51V systems

2019 ◽  
Vol 223 ◽  
pp. 01013
Author(s):  
Giulia Colucci ◽  
Giovanna Montagnoli ◽  
Alberto M. Stefanini ◽  
Kouichi Hagino ◽  
Antonio Caciolli ◽  
...  
Keyword(s):  
Experimental Data ◽  
Comparative Study ◽  
Excitation Function ◽  
Ground State ◽  
Weak Coupling ◽  
Coupling Scheme ◽  
Excitation Functions ◽  
Coupled Channels ◽  
Barrier Distribution ◽  
Good Agreement

A detailed comparative study of the sub-barrier fusion of the two near-by systems 36S+50Ti,51V was performed at the National Laboratories of Legnaro (INFN). Aim of the experiment was the investigation of possible effects of the non-zero spin of the ground state of the 51V nucleus on the sub-barrier excitation function, and in particular on the shape of the barrier distribution. The results sh w that the two measured excitation functions are very similar down to the level of 20 - 30 μb. The same is observed for the two barrier distributions. Coupled-channels calculations have been performed and are in good agreement with the experimental data. This result indicates that the low-lying levels in 51V can be interpreted in the weak-coupling scheme, that is, 51V(I) = 50Ti(2+)⊗ p(1 f7/2).

Determination of hyperon properties through the variational method considering the hyperfine interaction

2019 ◽  
Vol 28 (10) ◽  
pp. 1950087 ◽  
Author(s):  
S. M. Moosavi Nejad ◽  
A. Armat
Keyword(s):  
Experimental Data ◽  
Wave Function ◽  
Ground State ◽  
Radiative Decay ◽  
Magnetic Moments ◽  
Wave Functions ◽  
Decay Widths ◽  
Free Parameters ◽  
Theoretical Results

Performing a fit procedure on the hyperon masses, we first determine the free parameters in the Cornell-like hypercentral potential between the constituent quarks of hyperons in their ground state. To this end, using the variational principle, we apply the hyperspherical Hamiltonian including the Cornell-like hypercentral potential and the perturbation potentials due to the spin–spin, spin–isospin and isospin–isospin interactions between constituent quarks. In the following, we compute the hyperon magnetic moments as well as radiative decay widths of spin-3/2 hyperons using the spin-flavor wave function of hyperons. Our analysis shows acceptable consistencies between theoretical results and available experimental data. This leads to reliable wave functions for hyperons at their ground state.

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