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SPS organises a seminar by Satrajit Adhikari

SPS organises a seminar by Satrajit Adhikari

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SPS organises a seminar by Satrajit Adhikari
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School of Physical Sciences
Jawaharlal Nehru University, New Delhi

 


Beyond Born-Oppenheimer Theories on Spectroscopy, Scattering and Phaseansitions

 

Speaker: Satrajit Adhikari
(Indian Association for the Cultivation of Science, Kolkata)

 

Date: 22– May -2018
Time: 4 p.m, Tuesday
Venue: Seminar Room, SPS

 

Abstract : Beyond Born-Oppenheimer (BBO) theories are formulated from first principle for the construction of diabatic potential energy surfaces (PESs) both for spectroscopic [1-3] (Na3, K3, NO2, NO3, C6H6+ and C6H3F3+ ) and scattering [4] processes (D++ H2). Jahn-Teller (JT) and Renner-Teller (RT) types of conical intersections (CIs) along with Pseudo Jahn-Teller (PJT) interactions in those systems and semi-circular CI seam (rather than a CI point) between the ground and first excited states of H3 + system are the new interesting observations. Nuclear dynamics are performed on the diabatic PESs of Na3, NO2 and NO3 to calculate the photoelectron spectra, which match quite well with the experimentally measured ones. We have also carried out reactive scattering dynamics [4,5] on the diabatic surfaces for H3 + system in hyperspherical coordinates for total angular momentum zero and non-zero situation to reproduce experimental cross sections and rate coefficients for reactive non-charge and charge transfer processes.
Optical spectra of REMnO3 (RE = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy) shows anomalous temperature dependence around the Neel temperature [6]. This behavior could be due to Jahn-Teller effect both in ground and excited state. Such observations have been investigated [7] theoretically to interprete the experimental spectra due to the excitations of the quantum rotors.

A warm welcome to the modified and updated website of the Centre for East Asian Studies. The East Asian region has been at the forefront of several path-breaking changes since 1970s beginning with the redefining the development architecture with its State-led development model besides emerging as a major region in the global politics and a key hub of the sophisticated technologies. The Centre is one of the thirteen Centres of the School of International Studies, Jawaharlal Nehru University, New Delhi that provides a holistic understanding of the region.

Initially, established as a Centre for Chinese and Japanese Studies, it subsequently grew to include Korean Studies as well. At present there are eight faculty members in the Centre. Several distinguished faculty who have now retired include the late Prof. Gargi Dutt, Prof. P.A.N. Murthy, Prof. G.P. Deshpande, Dr. Nranarayan Das, Prof. R.R. Krishnan and Prof. K.V. Kesavan. Besides, Dr. Madhu Bhalla served at the Centre in Chinese Studies Programme during 1994-2006. In addition, Ms. Kamlesh Jain and Dr. M. M. Kunju served the Centre as the Documentation Officers in Chinese and Japanese Studies respectively.

The academic curriculum covers both modern and contemporary facets of East Asia as each scholar specializes in an area of his/her interest in the region. The integrated course involves two semesters of classes at the M. Phil programme and a dissertation for the M. Phil and a thesis for Ph. D programme respectively. The central objective is to impart an interdisciplinary knowledge and understanding of history, foreign policy, government and politics, society and culture and political economy of the respective areas. Students can explore new and emerging themes such as East Asian regionalism, the evolving East Asian Community, the rise of China, resurgence of Japan and the prospects for reunification of the Korean peninsula. Additionally, the Centre lays great emphasis on the building of language skills. The background of scholars includes mostly from the social science disciplines; History, Political Science, Economics, Sociology, International Relations and language.

Several students of the centre have been recipients of prestigious research fellowships awarded by Japan Foundation, Mombusho (Ministry of Education, Government of Japan), Saburo Okita Memorial Fellowship, Nippon Foundation, Korea Foundation, Nehru Memorial Fellowship, and Fellowship from the Chinese and Taiwanese Governments. Besides, students from Japan receive fellowship from the Indian Council of Cultural Relations.