Intermediate Coupling in 55Fe

1971 ◽  
Vol 49 (13) ◽  
pp. 1832-1835 ◽  
Author(s):  
M. Csürös ◽  
J. A. Cameron ◽  
Z. Zàmori
Keyword(s):  
Collective Model ◽  
Electromagnetic Properties ◽  
Intermediate Coupling ◽  
Spectroscopic Factors ◽  
Good Agreement

Calculations based on the collective model with intermediate coupling between the surface oscillations of the even–even core 54Fe and 29th neutron have been carried out. Level energies, spectroscopic factors, and electromagnetic properties are obtained in good agreement with experiment.

PRECURSOR OF ANTIFERROMAGNETIC BANDS IN THE HALF-FILLED TWO-DIMENSIONAL HUBBARD MODEL

1999 ◽  
Vol 13 (27) ◽  
pp. 3183-3192
Author(s):  
BUMSOO KYUNG
Keyword(s):  
Hubbard Model ◽  
Density Of States ◽  
Density Wave ◽  
Spin Density Wave ◽  
Local Maximum ◽  
Two Dimensional ◽  
Intermediate Coupling ◽  
Critical Fluctuations ◽  
Wave Approximation ◽  
Good Agreement

We study the half-filled two-dimensional Hubbard model in the intermediate coupling regime. As temperature is decreased for a two-dimensional half-filled band, two-dimensional critical fluctuations give rise to a strong local maximum in | Im Σ(k F , ω)| at ω=0, leading to a split peak with a pseudogap inside in the spectral function and the density of states. The calculated energy dispersion is in good agreement with that of spin density wave approximation.

Terahertz Ray Nondestructive Characterizations in FRP Composites

2010 ◽  
Vol 123-125 ◽  
pp. 839-842 ◽  
Author(s):  
Je Woong Park ◽  
Kwang Hee Im ◽  
David K. Hsu ◽  
Chien Ping Chiou ◽  
Daniel J. Barnard
Keyword(s):  
Composite Laminates ◽  
Electromagnetic Properties ◽  
Reflection Mode ◽  
Frp Composites ◽  
Frp Composite ◽  
Application Systems ◽  
Spectroscopy System ◽  
Terahertz Ray ◽  
Characterization Procedure ◽  
Good Agreement

Recently, terahertz ray imaging has emerged as one of the most promising new powerful nondestructive evaluation (NDE) techniques, and new application systems are under processing development for the area applications. In this study, a new time-domain spectroscopy system was utilized for detecting and evaluating layup effect and flaw in FRP composite laminates. Extensive experimental measurements in reflection mode were made to map out the T-ray images. Especially in this characterization procedure, we estimated the electromagnetic properties such as the refractive index. Estimates of properties are in good agreement with known data. Furthermore layup effect and flaw of FRP composite laminates were observed in reflection mode and limitations will be discussed in the T-ray processing.

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.

NUCLEAR STRUCTURE OF 150Sm IN THE DPPQ MODEL AND IBM

2010 ◽  
Vol 19 (07) ◽  
pp. 1491-1511 ◽  
Author(s):  
J. B. GUPTA ◽  
K. KUMAR ◽  
J. H. HAMILTON
Keyword(s):  
Nuclear Structure ◽  
Excited States ◽  
Structural Characteristics ◽  
Microscopic Theory ◽  
Collective Model ◽  
Alternative View ◽  
Transition Rates ◽  
Spectroscopic Factors ◽  
Decay Pattern ◽  
Boson Model

The decay pattern of the low lying levels in the shape transitional nucleus 150 Sm is analyzed in terms of the quasi-vibrational and quasi-rotational collective model. The Dynamic Pairing plus quadrupole Model in the microscopic theory of the collective model is employed to predict extensive structure characteristics. The potential energy surface (PES), the spectroscopic factors and the E2, E0 transition rates from the DPPQ model are illustrated. Comparison is made with the predictions in the Interacting Boson Model (IBM-1). A correspondence is demonstrated of the effect of the control parameter in the two models on the calculated nuclear structure. The study of the wave functions of the two spin I = 2 excited states in IBM is carried out. The alternative view of an anharmonic vibrator and a soft rotor is discussed in terms of the E2 transition rates and other structural characteristics.

A 20 MeV (p, d) study of nuclear structure in the even and odd tin isotopes

1982 ◽  
Vol 60 (4) ◽  
pp. 428-448 ◽  
Author(s):  
Donald G. Fleming
Keyword(s):  
Excitation Energy ◽  
Nuclear Structure ◽  
Born Approximation ◽  
Experimental Spectrum ◽  
Valence Neutron ◽  
Bcs Theory ◽  
Final States ◽  
Sum Rule ◽  
Spectroscopic Factors ◽  
Good Agreement

The nuclear structure of the even and odd tin isotopes has been studied by 20 MeV (p,d) reactions. States strongly populated in the odd isotopes are due to the valence neutron shells and extend up to only 2 MeV of excitation energy; "deep hole" states were not identified. The occupation probabilities extracted from finite-range distorted-wavc-Born-approximation calculations generally agree well with the predictions of the BCS theory of superconducting nuclei, particularly with the calculations of Clement and Baranger. In the even tin isotopes, strongly populated states are characterized predominantly by L = 2 transfers extending up to 4 MeV excitation energy. The experimental spectroscopic factors for transitions populating even final states are compared with the BCS calculated values of Clement and Baranger, Alzetta and Sawicki, and Van Gunsteren; relatively good agreement is obtained for L = 2 transitions, but not for L = 0 transitions. A considerable fraction of the expected sum rule L = 2 strength in 118Sn is missing in the 119Sn(p,d)118Sn experimental spectrum; in like manner, no 4+ strength could be identified in either 114Sn or 118Sn.

Reaction mechanism of the 16O + d reactions

1970 ◽  
Vol 48 (19) ◽  
pp. 2235-2253 ◽  
Author(s):  
N. E. Davison ◽  
W. K. Dawson ◽  
G. Roy ◽  
W. J. McDonald
Keyword(s):  
Experimental Data ◽  
Compound Nucleus ◽  
Cross Sections ◽  
Direct Interaction ◽  
Scattering Data ◽  
Orbit Potential ◽  
Spectroscopic Factors ◽  
Theoretical Predictions ◽  
Using Data ◽  
Good Agreement

The reactions 16O(d,d)16O, 16O(d,p)17O, and 16O(d,n)17F have been studied in the deuteron energy range 4.00–6.00 MeV in order to determine to what extent current theories can satisfactorily describe these reactions. It was found that the theoretical curves from both the optical and DWBA models fit the experimental data significantly better when the deuteron optical-model potentials had been obtained using a spin–orbit potential in the analysis of the elastic scattering data. Spectroscopic factors obtained for the ground and first-excited states of 17O and 17F using the DWBA theory are in satisfactory agreement with theoretical predictions and with values obtained by previous workers. Small, but nonzero, spectroscopic factors have been obtained for the states at 3.058 and 3.846 MeV excitation in 17O using data measured in this work and in previous experiments. The sum of the calculated direct interaction and compound-nucleus cross sections is in good agreement with experimental data for all states studied, whether they were populated primarily by direct or compound-nucleus reactions. The calculated compound-nucleus lifetimes are also in agreement with values obtained from an analysis of the fluctuations in the yield curves.

scholarly journals Theoretical Study of Electromagnetic Interference Shielding of 2D MXenes Films

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 652 ◽  
Author(s):  
Zhenyu Li ◽  
Zeyu Wang ◽  
Weixin Lu ◽  
Bo Hou
Keyword(s):  
Electromagnetic Interference ◽  
Theoretical Study ◽  
Measured Data ◽  
Electromagnetic Properties ◽  
Metal Carbides ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Transition Metal Carbides ◽  
Electromagnetic Interference Shielding Effectiveness ◽  
Good Agreement

The advance of research on 2D transition metal carbides, carbonitrides, and nitrides (collectively known as MXenes) has progressed rapidly since the introduction of Ti3C2 in 2011. Nowadays the number of MXene synthesized in lab has reached more than 20, while there are currently about 20 theoretically predicted structures. In this study, we calculate the electromagnetic interference shielding effectiveness of a series of MXene films in theory and find that the results are in good agreement with the measured data. From this, we can use this method to calculate electromagnetic properties of all kinds of 2D material films which are similar to Mxenes.

The cloudy bag model. IV. Pionic corrections to the nucleon properties

1982 ◽  
Vol 60 (1) ◽  
pp. 59-72 ◽  
Author(s):  
Serge Théberge ◽  
Gerald A. Miller ◽  
A. W. Thomas
Keyword(s):  
Center Of Mass ◽  
Hamiltonian Formalism ◽  
Experimental Results ◽  
Electromagnetic Properties ◽  
Renormalization Procedure ◽  
Bag Model ◽  
Good Agreement

A detailed formulation of the Hamiltonian formalism, together with a consistent renormalization procedure, is described for the cloudy bag model. The electromagnetic properties of the nucleon are calculated with center-of-mass corrections included. Good agreement with the experimental results is obtained for bag radii ranging from 0.8 to 1.0 fm.

Using a double folding potential for the derivation of the spectroscopic factors of the (3He, d) transfer reaction

2016 ◽  
Vol 25 (09) ◽  
pp. 1650061 ◽  
Author(s):  
R. Pampa Condori ◽  
H. Dias ◽  
J. Lubian
Keyword(s):  
Born Approximation ◽  
Transfer Reaction ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
Model Calculations ◽  
Folding Potential ◽  
Spectroscopic Factors ◽  
Double Folding ◽  
Double Folding Potential ◽  
Good Agreement

In this paper, the [Formula: see text] reactions are revisited, with the goal of obtaining spectroscopic factors (SF) for the transition to the ground state of some residual nuclei, applying the distorted wave Born approximation (DWBA). The double-folding São Paulo Potential (SPP) was used to derive the distorted wave function in the entrance and exit channels. The derived SF are compared with the results of extensive shell model calculations showing a rather good agreement.

scholarly journals Landau–Zener Effect in Superfluid Nuclear Systems

2003 ◽  
Vol 18 (26) ◽  
pp. 1809-1817 ◽  
Author(s):  
M. Mirea
Keyword(s):  
Equations Of Motion ◽  
Deformation Energy ◽  
Cluster Decay ◽  
Many Body ◽  
Spectroscopic Factors ◽  
Nuclear Systems ◽  
Particle Level ◽  
Many Body Systems ◽  
Experimental Ratio ◽  
Good Agreement

The Landau–Zener effect is generalized for many-body systems with pairing residual interactions. The microscopic equations of motion are obtained and the 14C decay of 223Ra spectroscopic factors are deduced. An asymmetric nuclear shape parametrization given by two intersected spheres is used. The single particle level scheme is determined in the frame of the superasymmetric two-center shell model. The deformation energy is computed in the microscopic–macroscopic approximation. The penetrabilities are obtained within the WKB approximation. The fine structure of the cluster decay analyzed in the frame of this formalism gives a very good agreement with the experimental ratio of partial half-lives for transition to the first excited state and to the ground state.

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