Angular Distribution Studies for 65Zn Nuclei from 63Cu (α, pnγ) Reaction Using Constant Statistical Tensor, Least Square Fitting and σ/J Methods

Multiple mixing ratios (δ-values) have been calculated for high-spin states excited in 29𝐶𝑢 63 (α,pnγ) 𝑍𝑛 30 65 in present work using constant statistical tensor (CST), least square fitting (LSF) and σ/J methods together with experimental values reported for such γ-transition the good agreement for (δ-values) calculated in these three methods confirms its validity to calculate the (δ-values) for γ-transition.

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CALCULATION OF MULTIPLE MIXING RATIOS OF GAMMA RAYS FROM (_60^(142-150))Nd(n,n^ˊ )(_60^(142-150))Nd INTERACTION

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i8.2019.637 ◽

2019 ◽

Vol 7 (8) ◽

pp. 39-50

Author(s):

Taghreed Abdull-jabbar Younis ◽

Adel Kamel Shbeeb

Keyword(s):

Gamma Rays ◽

Experimental Error ◽

Energy Levels ◽

Experimental Results ◽

Mixing Ratios ◽

Multiple Mixing ◽

Statistical Tensor ◽

Gamma Transitions ◽

Good Agreement

In the current research, multiple mixing ratios of gamma -transitions of the energy levels isotopes populated in interaction are calculated using the constant statistical tensor (CST) method. The results obtained are, in general, in good agreement or consistent, within the experimental error, with the results published in the previously researches. Existing discrepancies result from inaccuracies in the experimental results of previous works. The current results confirm the validity of the constant statistical tenser method of calculating the values of mixing ratios and its predictability of errors in experimental results.

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MULTIPLE MIXING RATIOS OF GAMMA RAY TRANSITIONS FROM (_60^(142- 150))Nd (n,n^ˊ γ) (_60^(142- 150))Nd REACTION USING a_2- RATIO METHOD

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i8.2019.657 ◽

2019 ◽

Vol 7 (8) ◽

pp. 197-207

Author(s):

Taghreed Abdull Jabbar Younis

Keyword(s):

Experimental Error ◽

Gamma Ray ◽

Energy Levels ◽

Ratio Method ◽

Initial State ◽

Mixing Ratios ◽

Multiple Mixing ◽

Statistical Tensor ◽

Gamma Transitions ◽

Good Agreement

In the current work, the mixing ratios ( ) of gamma transitions were calculated from energy levels in the isotopes neodymium populated in the using the ratio method. We used the experimental coefficient ( ) for two γ-transitions from the initial state itself, the statistical tensor , associated with factor , would be the same for the two transitions. The results obtained are in good agreement or within the experimental error with -those previously published. And existing contradictions resulting from inaccuracies in the empirical results of previous work. The current results confirm that the method is used to calculate the values of mixing ratios and the feasibility of this method in predicting errors in experimental results.

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The Mainz profile algorithm (MAPA)

Atmospheric Measurement Techniques ◽

10.5194/amt-12-1785-2019 ◽

2019 ◽

Vol 12 (3) ◽

pp. 1785-1806 ◽

Cited By ~ 7

Author(s):

Steffen Beirle ◽

Steffen Dörner ◽

Sebastian Donner ◽

Julia Remmers ◽

Yang Wang ◽

...

Keyword(s):

A Priori ◽

Scaling Factor ◽

Least Square ◽

Trace Gas ◽

Vertical Profiles ◽

Mixing Ratios ◽

Surface Mixing ◽

Sensitivity Studies ◽

The Impact ◽

Good Agreement

Abstract. The Mainz profile algorithm (MAPA) derives vertical profiles of aerosol extinction and trace gas concentrations from MAX-DOAS measurements of slant column densities under multiple elevation angles. This paper presents (a) a detailed description of the MAPA (v0.98), (b) results for the CINDI-2 campaign, and (c) sensitivity studies on the impact of a priori assumptions such as flag thresholds. Like previous profile retrieval schemes developed at MPIC, MAPA is based on a profile parameterization combining box profiles, which also might be lifted, and exponential profiles. But in contrast to previous inversion schemes based on least-square fits, MAPA follows a Monte Carlo approach for deriving those profile parameters yielding best match to the MAX-DOAS observations. This is much faster and directly provides physically meaningful distributions of profile parameters. In addition, MAPA includes an elaborated flagging scheme for the identification of questionable or dubious results. The AODs derived with MAPA for the CINDI-2 campaign show good agreement with AERONET if a scaling factor of 0.8 is applied for O4, and the respective NO2 and HCHO surface mixing ratios match those derived from coincident long-path DOAS measurements. MAPA results are robust with respect to modifications of the a priori MAPA settings within plausible limits.

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Interpretation of the spectrum of Pb(II). Theoretical transition probabilities and lifetimes

Canadian Journal of Physics ◽

10.1139/p01-060 ◽

2001 ◽

Vol 79 (7) ◽

pp. 999-1009 ◽

Cited By ~ 6

Author(s):

C Colón ◽

A Alonso-Medina

Keyword(s):

Transition Probabilities ◽

Energy Levels ◽

Radiative Transition ◽

Least Square ◽

Large Contribution ◽

Hartree Fock ◽

Forbidden Transition ◽

Method Of Least Square ◽

Experimental Values ◽

Good Agreement

Radiative transition probabilities for 190 lines arising from the ns 2S1/2, np 2P1/2,3/2, nd 2D3/2,5/2, nf 2F5/2,7/2, and 6p2 (4P1/2,3/2,5/2, 2D3/2,5/2, 2P1/2,3/2, and 2S1/2) levels of Pb(II) have been calculated. Lifetimes of the above mentioned levels have been determined from the present transition probabilities. These values were obtained in intermediate coupling (IC) and using ab initio relativistic Hartree-Fock calculations. For the IC calculations, we use the standard method of least-square fitting of experimental energy levels by means of computer codes from Cowan. The results of calculations for radiative transition probabilities and excited states lifetimes are presented and compared with the experimental results present in the literature and with other theoretical values. There is generally good agreement between our values and the experimental data available. Analysis of the interaction shows that the level 4P5/2 of the 6s6p2 configuration presents a large contribution to the 2D5/2 level of the 6s26d configuration. This result explains the good agreement between our result and the experimental values obtained to the observed as the 6s6p2 4P5/2 6s 25f2F7/2 dipole-forbidden transition. PACS Nos.: 32.70^*, 32.70Fw, 32.70Cs

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Modeling of a Long-Term Creep Curve of Alloy 617 for a High Temperature Gas-Cooled Reactor

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.385-387.693 ◽

2008 ◽

Vol 385-387 ◽

pp. 693-696 ◽

Cited By ~ 7

Author(s):

Woo Gon Kim ◽

Song Nan Yin ◽

Ik Hee Jung ◽

Yong Wan Kim

Keyword(s):

Least Square ◽

Short Term ◽

Creep Tests ◽

Least Square Fitting ◽

Creep Curves ◽

Term Creep ◽

Good Agreement ◽

Short Term Creep ◽

Stress Dependency

This study aimed to model the long-term creep curves above 105 hours by implementing a nonlinear least square fitting (NLSF) of the Kachanov-Rabotnov (K-R) model. For this purpose, the short-term creep curves obtained from a series of creep tests at 950oC were used. In the NLSF of their full creep curves, the K-R model represented a poor match to the experimental curves, but the modified K-R one revealed a good agreement to them. The Monkman-Grant (M-G) strain represented the behavior of a stress dependency, but the 􀁏 parameter was constant with a stress independency. The 􀁏 value in the modified K-R model was 2.78. Long-term creep curves above 105 hours from short-term creep data were modeled by the modified K-R model.

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ROTATIONAL STATES IN DEFORMED EVEN–EVEN NUCLEI

Canadian Journal of Physics ◽

10.1139/p67-298 ◽

1967 ◽

Vol 45 (11) ◽

pp. 3521-3532 ◽

Cited By ~ 5

Author(s):

Raj K. Gupta

Keyword(s):

Energy Levels ◽

Spin States ◽

Coupling Constant ◽

Rotational States ◽

Rotational Bands ◽

High Spin States ◽

Oscillator Type ◽

The Moment ◽

Vibration Coupling ◽

Good Agreement

The deviations from the simple I(I + 1) dependence of the energy levels in the ground-state rotational bands on the hydrodynamical model of Bohr and Mottelson have been investigated for both regions of stable deformation. An interpretation of high spin states is looked for in terms of a nonrigid rotator with vibrations (harmonic oscillator type) taken as perturbation. In the framework of this model, the energy expression is obtained as a power series in the product of the ratio B/A and the weight factor I(I + 1), where A is related to the moment of inertia and B is the rotation–vibration coupling constant. The calculations are shown to be in good agreement with the experimental data.

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Theoretical Studies of Sum Optical Properties for InAs (001) by Surface Differential Reflectivity

Baghdad Science Journal ◽

10.21123/bsj.4.2.255-259 ◽

2007 ◽

Vol 4 (2) ◽

pp. 255-259

Author(s):

Baghdad Science Journal

Keyword(s):

Mathematical Model ◽

Least Square ◽

Complex Dielectric Constant ◽

Theoretical Studies ◽

Analysis Method ◽

Least Square Fitting ◽

Result Show ◽

Linear Least Square ◽

Differential Reflectivity ◽

Good Agreement

The real and imaginary part of complex dielectric constant for InAs(001) by adsorption of oxsagen atoms has been calculated, using numerical analysis method (non-linear least square fitting). As a result a mathematical model built-up and the final result show a fairly good agreement with other genuine published works.

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Configuration Mixing for Po Isotopes within the Interacting Boson Model-2

Ukrainian Journal of Physics ◽

10.15407/ujpe66.7.582 ◽

2021 ◽

Vol 66 (7) ◽

pp. 582

Author(s):

L.A. Najam ◽

S.N. Abood ◽

F.M.A. Al-Jomaily

Keyword(s):

Excited States ◽

Energy Levels ◽

Least Square ◽

Interacting Boson Model ◽

Shape Coexistence ◽

Least Square Fit ◽

Configuration Mixing ◽

Boson Model ◽

Experimental Values ◽

Good Agreement

We analyze a sequence of 194−204Po isotopes, using the Configuration Mixing (CM) Interacting Boson Model 2 (IBM-2). We set the parameters of Hamiltonian using a least-square fit for the known energy levels, electrical transition rates B(E2), and quadruple moments Q(2+1) for the first excited states. We have a good agreement with the experimental values for all the observables tested, and we infer that the feature of the shape coexistence is concealed in the isotopes of Po, just as in the isotopes of Os and Pt.

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