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Dive into the research topics where Bediha Beser is active.

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Featured researches published by Bediha Beser.


Journal of Chemical Physics | 2009

Experimental investigation of the Rb-85(2) a (3)Sigma(+)(u) triplet ground state: Multiparameter Morse long range potential analysis

Bediha Beser; Vladimir B. Sovkov; Jianmei Bai; Ergin Ahmed; Chin-Chun Tsai; F. Xie; Li Li; Valery S. Ivanov; A. M. Lyyra

Using perturbation facilitated infrared-infrared double resonance excitation of the (85)Rb(2) molecule, we have observed spectrally resolved fluorescence to the a (3)Sigma(u)(+) state. We have analyzed the rovibrational energy level structure of the (85)Rb(2) a (3)Sigma(u)(+) state and derived a multiparameter Morse Long Range (MLR) potential and molecular constants for this state, which can be used to predict term values without needing to solve the radial Schrödinger equation.


Journal of Chemical Physics | 2015

Electronic transition dipole moment and radiative lifetime calculations of sodium dimer ion-pair states

Aydin Sanli; Bediha Beser; John R. Edwardson; Sylvie Magnier; Ergin Ahmed; A. Marjatta Lyyra

We report here ab initio calculated electronic transition dipole moments for the sodium dimer ion pair states of (1)Σg (+) symmetry. They vary strongly as a function of internuclear distance because of the effect of the Na(+) + Na(-) ion pair potential, which also causes the formation of additional wells and shoulders in the molecular potential energy curves. We also present a computational study of the transition dipole moment matrix elements and lifetimes for these ion-pair states.


Physical Review A | 2011

Global analysis of data on the spin-orbit-coupled A {sup 1{Sigma}}{sub u}{sup +} and b {sup 3{Pi}}{sub u} states of Cs{sub 2}

Jianmei Bai; Ergin Ahmed; Bediha Beser; Y. Guan; Svetlana Kotochigova; A. M. Lyyra; S. Ashman; C.M. Wolfe; John Huennekens; Feng Xie; Dan Li; Li Li; M. Tamanis; R. Ferber; A. Drozdova; E. Pazyuk; Andrey V. Stolyarov; Johann G. Danzl; H.-C. Naegerl; Moscow Ru

We present experimentally derived potential curves and spin-orbit interaction functions for the strongly perturbed A {sup 1{Sigma}}{sub u}{sup +} and b {sup 3{Pi}}{sub u} states of the cesium dimer. The results are based on data from several sources. Laser-induced fluorescence Fourier transform spectroscopy (LIF FTS) was used some time ago in the Laboratoire Aime Cotton primarily to study the X {sup 1{Sigma}}{sub g}{sup +} state. More recent work at Tsinghua University provides information from moderate resolution spectroscopy on the lowest levels of the b {sup 3{Pi}}{sub 0u}{sup {+-}} state as well as additional high-resolution data. From Innsbruck University, we have precision data obtained with cold Cs{sub 2} molecules. Recent data from Temple University was obtained using the optical-optical double resonance polarization spectroscopy technique, and finally, a group at the University of Latvia has added additional LIF FTS data. In the Hamiltonian matrix, we have used analytic potentials (the expanded Morse oscillator form) with both finite-difference (FD) coupled-channel and discrete variable representation (DVR) calculations of the term values. Fitted diagonal and off-diagonal spin-orbit functions are obtained and compared with ab initio results from Temple and Moscow State universities.


Physical Review A | 2009

Spectroscopic observations, spin-orbit functions, and coupled-channel deperturbation analysis of data on the A (1)Sigma(+)(u) and b (3)Pi(u) states of Rb-2

Houssam Salami; Thomas Bergeman; Bediha Beser; Jianmei Bai; Ergin Ahmed; Svetlana Kotochigova; A. M. Lyyra; John Huennekens; C. Lisdat; Andrey V. Stolyarov; Olivier Dulieu; P. Crozet; Amanda J. Ross


Journal of Chemical Physics | 2011

Collisional transfer of population and orientation in NaK.

C. M. Wolfe; S. Ashman; J. Bai; Bediha Beser; Ergin Ahmed; A. M. Lyyra; John Huennekens


Physical Review A | 2008

Experimental mapping of the absolute magnitude of the transition dipole moment function μe(R) of the Na2 A 1Σu-X 1Σ+g transition

Ergin Ahmed; P. Qi; Bediha Beser; Jianmei Bai; Robert W. Field; J. Huennekens; A. M. Lyyra


Bulletin of the American Physical Society | 2012

The Glassy State of Crambin and the THz Time Scale Fluctuations Related to Protein Function

Kristina Woods; Bediha Beser


Physical Review A | 2011

Global analysis of data on the spin-orbit-coupled A {sup 1}{sub u}{sup +} and b {sup 3}{sub u} states of Cs

Jianmei Bai; Ergin Ahmed; Bediha Beser; Yi Guan; Svetlana Kotochigova; A. Marjatta Lyyra; Stephen M. Ashman; C.M. Wolfe; John Huennekens; Feng Xie; Dan Li; L. F. Li; M. Tamanis; R. Ferber; Anastasia Drozdova; E. A. Pazyuk; Andrey V. Stolyarov; Johann G. Danzl; Hanns Christoph Naegerl; Nadia Bouloufa


Archive | 2010

Collisional molecular orientation transfer in polarization spectra of the A^1sigmau^+ state of ^85Rb2 and Cs2 dimers

Jianmei Bai; Bediha Beser; Ergin Ahmed; Yafei Guan; C.M. Wolfe; Seth T. Ashman; John Huennekens; Marjatta Lyyra


Bulletin of the American Physical Society | 2009

Observation of the

Bediha Beser; Jianmei Bai; Ergin Ahmed; Vladimir B. Sovkov; Valery S. Ivanov; Feng Xie; Li Li; Marjatta Lyyra

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Li Li

Tsinghua University

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