Neutron proton interaction potentials from experimental phase shifts

1987 ◽  
Vol 328 (3) ◽  
pp. 265-273 ◽  
Author(s):  
J. Kuberczyk ◽  
M. Coz ◽  
H. V. Geramb ◽  
J. D. Lumpe
Keyword(s):  
Phase Shifts ◽  
Experimental Phase ◽  
Interaction Potentials ◽  
Proton Interaction

scholarly journals S-wave kaon–nucleon potentials with all-to-all propagators in the HAL QCD method

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Kotaro Murakami ◽  
◽  
Yutaro Akahoshi ◽  
Sinya Aoki
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Phase Shifts ◽  
Quark Propagator ◽  
Repulsive Interaction ◽  
S Wave ◽  
Experimental Phase ◽  
Future Studies ◽  
Zero Momentum ◽  
The One

Abstract Employing an all-to-all quark propagator technique, we investigate kaon–nucleon interactions in lattice QCD. We calculate the S-wave kaon–nucleon potentials at the leading order in the derivative expansion in the time-dependent HAL QCD method, using (2+1)-flavor gauge configurations on $32^3 \times 64$ lattices with lattice spacing $a \approx 0.09$ fm and pion mass $m_{\pi} \approx 570$ MeV. We take the one-end trick for all-to-all propagators, which allows us to put the zero-momentum hadron operators at both source and sink and to smear quark operators at the source. We find a stronger repulsive interaction in the $I=1$ channel than in the $I=0$. The phase shifts obtained by solving the Schrödinger equations with the potentials qualitatively reproduce the energy dependence of the experimental phase shifts, and have similar behavior to previous results from lattice QCD without all-to-all propagators. Our study demonstrates that the all-to-all quark propagator technique with the one-end trick is useful for studying interactions in meson–baryon systems in the HAL QCD method, so we will apply it to meson–baryon systems which contain quark–antiquark creation/annihilation processes in our future studies.

Radial Distribution Function of Tin Thin Film Adjusted by Experimental Phase Shifts

2001 ◽  
Vol 7 (S2) ◽  
pp. 260-261
Author(s):  
C. González-Valenzuela ◽  
F. Espinosa-Magaña ◽  
R. Martínez-Sánchez ◽  
A. Duarte-Möller
Keyword(s):  
Thin Film ◽  
Energy Loss ◽  
Spot Size ◽  
Primary Energy ◽  
Phase Shifts ◽  
Acquisition Time ◽  
Experimental Phase ◽  
Transmission Electron ◽  
Dc Sputtering Technique ◽  
Atomic Parameters

Titanium Nitride thin film was obtained by the DC-Sputtering technique and characterized using the transmission EXEELFS formalism . The experiments were performed in a CM 200 transmission electron microscope with a GAT AN 766 PEELS attachment. A primary energy of 200 keV and a spot size of 440 nm with an average acquisition time of 5 min were used. The atomic distribution obtained using EXEELFS was corrected with the respective experimental phase shifts. Atomic parameters were compared with those corrected by EXAFS phase shits and the known crystallographic values.The energy loss spectra for the sample, around the ionization Ti L23-edge and N K-edge corrected for background and multiple scattering process is shows in Figure 1. N K-edge appears at an energy loss of 400.4 eV and the Ti L23-edge is located at an energy loss of 464.3 eV. These values on energy are shifted 0.6 eV respect to the isolated transitions.

Nuclear interaction matrix elements in a phase-shift approximation

1969 ◽  
Vol 47 (22) ◽  
pp. 2459-2474 ◽  
Author(s):  
M. K. Srivastava ◽  
A. M. Jopko ◽  
Donald W. L. Sprung
Keyword(s):  
Phase Shift ◽  
Shell Model ◽  
Model Calculation ◽  
Nuclear Interaction ◽  
Phase Shifts ◽  
Shell Model Calculation ◽  
Interaction Matrix ◽  
Matrix Elements ◽  
Experimental Phase ◽  
Practical Scheme

A method suggested by Elliott for calculating nuclear interaction matrix elements directly from phase shifts is developed into a practical scheme applicable to all partial waves. Matrix elements are constructed from experimental phase shifts and compared to several other calculations. A shell-model calculation of 58Ni based on these matrix elements gives results comparable to those of Kuo.

The coefficients of viscosity and thermal conductivity of atomic hydrogen from 1 to 400 °K

1965 ◽  
Vol 284 (1397) ◽  
pp. 237-251 ◽  
Keyword(s):  
Thermal Conductivity ◽  
Wave Equation ◽  
Cross Sections ◽  
Atomic Hydrogen ◽  
Scattering Theory ◽  
Phase Shifts ◽  
Empirical Method ◽  
Interaction Potentials ◽  
Coefficient Of Viscosity ◽  
Correction Terms

Quantal scattering theory has been applied to calculate the coefficients of viscosity and thermal conductivity of atomic hydrogen from 1 to 400 °K on the basis of the accurate interaction potentials of Dalgarno & Lynn. The wave equation has been integrated numerically and phase shifts with their appropriate multiples of π are presented for L = 0(1) 35. The effect of the identity of the protons on the viscosity cross-sections has been investigated. The quantal cross-sections have been compared with the classical values of Dalgarno & Smith and with values estimated by the empirical method of Hirschfelder & Eliason. Correction terms have been evaluated for obtaining the second approximation to the coefficient of viscosity in the Chapman-Enskog formulation.

EXPERIMENTAL PHASE EQUILIBRIUM OF SULFUR HEXAFLUORIDE AND MINERAL OIL

2020 ◽  
Author(s):  
Afonso Ferreira Miguel Junior ◽  
Luiz Fernando Santos de Vasconcelos ◽  
Celina Kakitani ◽  
césar yutaka ofuchi ◽  
Moisés Marcelino Neto ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Sulfur Hexafluoride ◽  
Mineral Oil ◽  
Experimental Phase ◽  
Experimental Phase Equilibrium
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