Zobrazeno 1 - 10
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pro vyhledávání: '"Ray, Hasi"'
Autor:
Ray, Hasi
The elastic collision between two H-like atoms utilizing an ab-initio static-exchange model (SEM) in the center of mass (CM) frame considering the system as a four-body Coulomb problem where all the Coulomb interaction terms in the direct and exchang
Externí odkaz:
http://arxiv.org/abs/1612.05728
Autor:
Ray, Hasi
The static-exchange model (SEM) and the modified static-exchange model (MSEM) recently introduced by Ray [1] is applied to study the elastic collision between two hydrogen-like atoms when both are in ground states considering the system as a four-bod
Externí odkaz:
http://arxiv.org/abs/1510.09094
Autor:
Ray, Hasi
The collision between a positronium (Ps) and a muonium (Mu) is studied for the first time using the static-exchange model and considering the system as a four-center Coulomb problem in the center of mass frame. An exact analysis is made to find the s
Externí odkaz:
http://arxiv.org/abs/1501.00260
Autor:
Ray, Hasi
The elastic collision between two ortho-positronium (e.g. S=1) atoms is studied using an ab-initio static-exchange model (SEM) in the center of mass (CM) frame considering the system as a four-body Coulomb problem where all the Coulomb interaction te
Externí odkaz:
http://arxiv.org/abs/1409.3371
Autor:
Ray, Hasi
The electron-electron correlation term in two-atomic collision is the most important, most difficult term to obtain the effective interatomic potential. Generally the H and H collision is a four center problem. It is extremely difficult to compute th
Externí odkaz:
http://arxiv.org/abs/1311.3132
The modified static exchange model (MSEM) recently introduced by Ray [1] to study two-atomic collision processes at low and cold-energies, is used for detailed analysis of the long-range effects due to induced dipole-dipole van der Waals interaction
Externí odkaz:
http://arxiv.org/abs/1308.1939
Autor:
Ray, Hasi
A modified static exchange model is introduced, it could be useful to control the elastic s-wave scattering length in studying cold-atomic interaction. The theory includes the long-range van der Waals interaction in addition to short-range exchange f
Externí odkaz:
http://arxiv.org/abs/1206.5476
Autor:
Ray, Hasi
The s-wave elastic phase-shifts and s-wave elastic cross sections are studied to find the effect of long-range forces on cold-atomic interactions using a modified static-exchange model for Ps-H system. A Feshbach resonance in the triplet channel usin
Externí odkaz:
http://arxiv.org/abs/1103.4915
Autor:
Ray, Hasi
A brief survey is made to highlight the recent interests in positron, positronium and antimatter physics. Positron is the first antiparticle observed which was predicted by Dirac. Positronium is itself its antiparticle and bi-positronium molecule is
Externí odkaz:
http://arxiv.org/abs/0912.3076
Autor:
Ray, Hasi
Ps ionization in Ps-atom scattering is of fundamental importance. The singly differential cross sections (SDCS) provides more accurate information to test a theory than integrated or total ionization cross section since the averaging over one paramet
Externí odkaz:
http://arxiv.org/abs/0808.3830