The quadruple deformation effects of 9Be in heavy-ion reactions

The effects of the projectile deformation and orientation on the total potential characteristic have been studied for the reactions between weakly bound nucleus, 9Be, as the projectile and different targets. In this paper, the double-folding model is used to calculate the nuclear potentials and deformation of projectile included. It is shown that applying the deformation effects can modify the potential barrier height and depth in the interior regions of the potential. It is also shown that the gradient variation of the potential barrier height is linearly increased when the angle between the projectile and the target nuclei increases. The rate of the variation is constant in different reactions with 9Be. In order to study the possible effect of these deformation dependent potentials, application is made in the calculation of cross-sections of the different reactions. It is observed that the deformation and orientation are of important role in the dynamics of such reactions and improve the agreement with the experimental results.

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Exponential dependence of potential barrier height on biased voltages of inorganic/organic static induction transistor

Journal of Semiconductors ◽

10.1088/1674-4926/31/4/044002 ◽

2010 ◽

Vol 31 (4) ◽

pp. 044002 ◽

Cited By ~ 1

Author(s):

Zhang Yong ◽

Yang Jianhong ◽

Cai Xueyuan ◽

Wang Zaixing

Keyword(s):

Barrier Height ◽

Potential Barrier ◽

Potential Barrier Height ◽

Exponential Dependence ◽

Static Induction Transistor ◽

Static Induction

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The potential barrier height for a Jahn-Teller center

Journal of Experimental and Theoretical Physics ◽

10.1134/1.1787091 ◽

2004 ◽

Vol 99 (1) ◽

pp. 189-196 ◽

Cited By ~ 1

Author(s):

V. N. Vasyukov ◽

A. D. Prokhorov ◽

V. P. D’yakonov ◽

H. Szymczak

Keyword(s):

Barrier Height ◽

Potential Barrier ◽

Potential Barrier Height ◽

Jahn Teller

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Effects of Charge Compensation on Colossal Permittivity and Electrical Properties of Grain Boundary of CaCu3Ti4O12 Ceramics Substituted by Al3+ and Ta5+/Nb5+

Molecules ◽

10.3390/molecules26113294 ◽

2021 ◽

Vol 26 (11) ◽

pp. 3294

Author(s):

Jakkree Boonlakhorn ◽

Jedsada Manyam ◽

Pornjuk Srepusharawoot ◽

Sriprajak Krongsuk ◽

Prasit Thongbai

Keyword(s):

Dielectric Properties ◽

Electrical Properties ◽

Grain Boundary ◽

Grain Boundaries ◽

Barrier Height ◽

Potential Barrier ◽

Charge Compensation ◽

Solid State Reaction Method ◽

Wide Frequency Range ◽

Potential Barrier Height

The effects of charge compensation on dielectric and electrical properties of CaCu3Ti4-x(Al1/2Ta1/4Nb1/4)xO12 ceramics (x = 0−0.05) prepared by a solid-state reaction method were studied based on the configuration of defect dipoles. A single phase of CaCu3Ti4O12 was observed in all ceramics with a slight change in lattice parameters. The mean grain size of CaCu3Ti4-x(Al1/2Ta1/4Nb1/4)xO12 ceramics was slightly smaller than that of the undoped ceramic. The dielectric loss tangent can be reduced by a factor of 13 (tanδ ~0.017), while the dielectric permittivity was higher than 104 over a wide frequency range. Impedance spectroscopy showed that the significant decrease in tanδ was attributed to the highly increased resistance of the grain boundary by two orders of magnitude. The DFT calculation showed that the preferential sites of Al and Nb/Ta were closed together in the Ti sites, forming self-charge compensation, and resulting in the enhanced potential barrier height at the grain boundary. Therefore, the improved dielectric properties of CaCu3Ti4-x(Al1/2Ta1/4Nb1/4)xO12 ceramics associated with the enhanced electrical properties of grain boundaries. In addition, the non-Ohmic properties were also improved. Characterization of the grain boundaries under a DC bias showed the reduction of potential barrier height at the grain boundary. The overall results indicated that the origin of the colossal dielectric properties was caused by the internal barrier layer capacitor structure, in which the Schottky barriers at the grain boundaries were formed.

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Potential Barrier Height Analysis of AlGaInP Multi-Quantum Barrier (MQB)

Japanese Journal of Applied Physics ◽

10.1143/jjap.29.l1977 ◽

1990 ◽

Vol 29 (Part 2, No. 11) ◽

pp. L1977-L1980 ◽

Cited By ~ 20

Author(s):

Takeshi Takagi ◽

Fumio Koyama ◽

Kenichi Iga

Keyword(s):

Barrier Height ◽

Potential Barrier ◽

Potential Barrier Height

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Low potential barrier height effects in magnetic tunneling junctions

Physical Review B ◽

10.1103/physrevb.76.214426 ◽

2007 ◽

Vol 76 (21) ◽

Cited By ~ 5

Author(s):

E. S. Cruz de Gracia ◽

L. S. Dorneles ◽

L. F. Schelp ◽

S. R. Teixeira ◽

M. N. Baibich

Keyword(s):

Barrier Height ◽

Potential Barrier ◽

Potential Barrier Height ◽

Tunneling Junctions ◽

Magnetic Tunneling Junctions ◽

Magnetic Tunneling

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Measurements of potential barrier height of grain boundaries in polycrystalline silicon by Kelvin probe force microscopy

Philosophical Magazine Letters ◽

10.1080/09500830500153859 ◽

2005 ◽

Vol 85 (1) ◽

pp. 41-49 ◽

Cited By ~ 37

Author(s):

S. Tsurekawa * ◽

K. Kido ◽

T. Watanabe

Keyword(s):

Grain Boundaries ◽

Barrier Height ◽

Potential Barrier ◽

Polycrystalline Silicon ◽

Potential Barrier Height ◽

Kelvin Probe Force Microscopy ◽

Kelvin Probe ◽

Force Microscopy

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Potential Barrier Height Effects on the Intrasubband and Intersubband Quasi-One-Dimensional Plasmons

Modern Physics Letters B ◽

10.1142/s0217984997000542 ◽

1997 ◽

Vol 11 (09n10) ◽

pp. 441-451 ◽

Cited By ~ 3

Author(s):

Paulo César Miranda Machado ◽

Francisco A. P. Osório ◽

A. Newton Borges

Keyword(s):

Barrier Height ◽

Potential Barrier ◽

Random Phase Approximation ◽

Rectangular Cross Section ◽

Pair Correlation ◽

Random Phase ◽

Potential Effect ◽

Potential Barrier Height ◽

Energy Structure ◽

Barrier Heights

The effects of the potential barrier height on the collective excitations of a electron gas confined in a GaAs-AlxGa1-xAs quantum wire of rectangular cross-section are investigated theoretically. For several potential barrier heights, we calculated the plasmon energy, structure factor and pair-correlation function, within the Random-Phase Approximation regime, considering a three-subband model with only the lowest subband populated by electrons. We verified that the intersubband plasmon is more sensitive to the potential barrier height variation than the intrasubband plasmon. We also observed that the confining potential effect decreases with the increasing of the wire-width.

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Analysis of fragment distribution and associated effects in 12,13C induced reactions

International Journal of Modern Physics E ◽

10.1142/s021830131450030x ◽

2014 ◽

Vol 23 (05) ◽

pp. 1450030

Author(s):

Manpreet Kaur ◽

Mahesh K. Sharma ◽

Manoj K. Sharma

Keyword(s):

Cross Sections ◽

Heavy Ion ◽

Evaporation Residue ◽

Incomplete Fusion ◽

Cluster Decay ◽

Weakly Bound ◽

Wide Range ◽

Reaction Channels ◽

Nice Agreement ◽

Fragment Distribution

The decay of 220 Ra * nucleus formed in two different entrance channels 12 C +208 Pb and 13 C +207 Pb is investigated over a wide range of incident energies using the dynamical cluster decay model (DCM). The DCM is a non-statistical model used to account for the decay of hot and rotating nuclei formed in low energy heavy ion reactions. The excitation functions are calculated by considering quadrupole (β2) deformations with optimum orientations [Formula: see text] of decaying fragments. The DCM-based cross-sections for evaporation residue (ER), fusion–fission, αxn and neutron decay processes find nice agreement with the reported experimental data over wide range of incident energies. The cross-sections corresponding to different decay mechanism are worked out within DCM by fitting neck length parameter (ΔR). The entrance channel and angular momentum effects are investigated in reference to the above-mentioned reaction channels. In addition to this, the fragment mass distribution is worked out by colliding 13 C weakly bound stable projectile with a variety of target nuclei resulting in 13 C +159 Tb , 13 C +181 Ta and 13 C +207 Pb reactions. At comparable projectile energies, the increase in target mass is shown to favor asymmetric fragmentation in the fissioning region. Besides this, the incomplete fusion (ICF) contribution is worked out for 12 C and 13 C channels by applying necessary energy corrections in the framework of DCM.

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Multi-interaction of multi-nucleon transfer reactions in the whole-angle region

Canadian Journal of Physics ◽

10.1139/p96-024 ◽

1996 ◽

Vol 74 (3-4) ◽

pp. 150-154 ◽

Cited By ~ 3

Author(s):

A. A. Farra

Keyword(s):

Cross Sections ◽

Exchange Process ◽

Heavy Ion ◽

Nucleon Nucleon ◽

Transfer Reactions ◽

Ion Transfer ◽

Exchange Processes ◽

Nucleon Nucleon Interaction ◽

Double Folding ◽

Good Agreement

Heavy-ion transfer reactions are studied using the exact finite-range DWBA (distorted wave Born approximation) calculations. To investigate the differential cross sections in the whole-angle region the reaction mechanism is considered as a coherent sum of direct and exchange processes. Both the double-folding microscopic nucleon–nucleon interaction and phenomenological Woods–Saxon form are used for the real and imaginary distorting potentials in the initial and final channels, respectively. The present calculations are in good agreement with the experimental data in the whole angular range. The inclusion of the exchange process improves the cross section's magnitude explicitly and leads to a better description of the backward oscillations. The values of the extracted normalization coefficients obtained are reasonable.

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