Scattering properties of 7Li vapor

Hawamdeh, Mustafa M.; Sandouqa, A. S.; Joudeh, B. R.; Al-Obeidat, O. T.; Ghassib, H. B.

doi:10.1140/epjp/s13360-022-03244-y

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…is the de Broglie wavelength of H↓ atoms [32]; A well-tested machinery, complete with the accompanying computing codes, has been used to compute numerically ( ) k  , using the Lippmann-Schwinger framework [34,35]. This is only valid for square-integrable (Fourier-transformable) potentials [5], as is the case for all momentum-space formalisms.…”

Section: Theoretical Formalismmentioning

confidence: 99%

Thermodynamic Properties and Critical Behavior of Spin-Polarized Atomic Hydrogen (H↓) Using the Quantum Second-Virial Coefficient

Joudeh

2023

Int J Thermophys

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The quantum-mechanical formulations for the second virial, and the acoustic virial, coefficients are derived for spin-polarized atomic hydrogen (H↓). The dependence of these coefficients on the temperature T as well as the nuclear polarization  is analyzed. This is done for the first time. The main inputs in these computations are the scattering phase shifts, which are obtained using the Lippmann-Schwinger equation, with the Silvera triplet-state potential.Starting with these phase shifts, comprehensive calculations of the thermophysical properties for this system are performed for T ranging from 1µK to 100 K, and  varying from 0 to 1. These properties include, in addition to the quantum second virial coefficient and the acoustic virial coefficient: the pressure-polarization-temperature ( )PT −  − behavior, the entropy (per atom), the speed of sound, the second virial correction (to the total internal energy per atom and unit density), and the specific heat capacity (per atom and unit density).The Boyle temperature and the Joule inversion temperature are determined. The Tdependence of these thermophysical properties, and related quantities, is explored. As expected, this dependence is most evident in the low-T limit, where quantum effects predominate. The corresponding  -dependence becomes noticeable at 80 K and below. It is observed that the virial coefficients tend to decrease with increasing  . Comparison of the present results to previous results are included whenever possible. The overall agreement is very good.As T is lowered, the disruptive effects of thermal energy are weakened relative to the attractive interactions between the atoms. Consequently, the H↓ gas makes a transition to a state of higher order and lower entropy -Bose-Einstein condensation (BEC). This is explored carefully.

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Section: Theoretical Formalismmentioning

confidence: 99%

Thermodynamic Properties and Critical Behavior of Spin-Polarized Atomic Hydrogen (H↓) Using the Quantum Second-Virial Coefficient

Joudeh

2023

Int J Thermophys

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“…Fluoro-Perovskites of various compositions and geometries have gotten a lot of interest because of their fascinating applications in a variety of industrial and engineering fields [1][2][3][4][5][6][7][8] such as piezo-electricity [9,10], ferromagnetism [11,12], photoluminescence [13,14], colossal magneto-resistivity [15], and high-temperature superconductivity [16,17], photovoltaic [18,19], photo electrode [20,21] photo catalytic [22,23], and solid electrolyte [24,25]. These materials are cheap in renewables and offer high energy conversion efficiencies nearing 25% when related to the twenty-eight traditional solar cell devices.…”

Section: Introductionmentioning

confidence: 99%

Structural, dynamical, thermodynamic properties of CdYF3 perovskite

Liu

2023

ETN

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The thermoelectric and thermodynamic characteristics of CdYF3 were examined for the first time using the density functional theory (DFT) framework within the generalized gradient approximation (GGA). The stability of the material is justified by calculating the optimization and phonon calculation. We employed diverse approximations like LDA, WC- GGA, PBE-GGA, and GGA-PBE-sol approximation to analyse the variation in the band gap while these approximations reveal an underestimate of the bandgap. Therefore we, employed the GGA+Trans-Blaha modified Becke–Johnson (TB-mBJ) approach to get the accurate bandgap with 2.305 eV value from (M-X) of the CdYF3 compound. Additionally, we computed transport properties against the temperature, Chemical potential, and charge carrier concentrations of the CdYF3 compound. At the optimum charge carriers, the calculated power factor suggests that p-type CdYF3 has a power factor. We also calculated the thermodynamics properties to evaluate the heat capacity at constant volume and pressure, enthalpy, etc. As a result, significant ZT in CdYF3 was achieved at higher values at room temperature to use in the thermal devices

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“…These are then fed into the Beth-Uhlenbeck equation to compute Bq. The thermophysical properties follow directly from well-known expressions [1,22,24,25,26,27,28,29,30,31]. These properties include: the virial equation of state, compressibility factor, total internal energy, specific heat capacity, and entropy.…”

Section: Introductionmentioning

confidence: 99%

4 He Gas in the Temperature-Range 1mK-5K: Thermodynamic Properties from the Quantum Second Virial Coefficient

Joudeh

Sandouqa

Al-Obeidat

et al. 2022

Preprint

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The quantum second virial coefficient Bq of low-dense 4He gas is calculated over the temperature-range 1 mK-5K. This is the first step in determining, according to standard expressions, the thermodynamic properties of the system, namely, the virial equation of state, compressibility factor, total internal energy, specific heat capacity, and entropy. These are compared to previous results wherever available. A large negative Bq is obtained. It is argued that this is intimately related to the formation of small clusters. Based on semi-quantitative analysis, the cluster formation is predicted to occur in the present system at a fairly low temperature ~ 0.049 K to 2.254 K.

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Scattering properties of 7Li vapor

Cited by 7 publications

References 17 publications

Thermodynamic Properties and Critical Behavior of Spin-Polarized Atomic Hydrogen (H↓) Using the Quantum Second-Virial Coefficient

Thermodynamic Properties and Critical Behavior of Spin-Polarized Atomic Hydrogen (H↓) Using the Quantum Second-Virial Coefficient

Structural, dynamical, thermodynamic properties of CdYF3 perovskite

4 He Gas in the Temperature-Range 1mK-5K: Thermodynamic Properties from the Quantum Second Virial Coefficient

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