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Kolkata, India

Sethi J.,Tata Institute of Fundamental Research | Palit R.,Tata Institute of Fundamental Research | Saha S.,Tata Institute of Fundamental Research | Trivedi T.,Tata Institute of Fundamental Research | And 17 more authors.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2013

The high spin negative parity states of 108Ag have been investigated with the 11B+100Mo reaction at 39 MeV beam energy using the INGA facility at TIFR, Mumbai. From the γ-γ coincidence analysis, an excited negative parity band has been established and found to be nearly degenerate with the ground state band. The spin and parity of the levels are assigned using angular correlation and polarization measurements. This pair of degenerate bands in 108Ag is studied using the recently developed microscopic triaxial projected shell model approach. The observed energy levels and the ratio of the electromagnetic transition probabilities of these bands in this isotope are well reproduced by the present model. Further, it is shown that the partner band has a different quasiparticle structure as compared to the yrast band. © 2013 Elsevier B.V.

Datta P.,Ananda Mohan College | Roy S.,Saha Institute of Nuclear Physics | Chattopadhyay S.,Saha Institute of Nuclear Physics
AIP Conference Proceedings | Year: 2014

At IUAC-INGA, our group has studied four neutron rich nuclei of mass-110 region, namely 109,110Ag and 108,110Cd. These nuclei provide the unique platform to study the interplay between Tilted and Principal axis rotation since these are moderately deformed and at the same time, shears structures are present at higher spins. The salient features of the high spin behaviors of these nuclei will be discussed which are the signatures of this interplay. © 2014 AIP Publishing LLC.

Roy S.,Saha Institute of Nuclear Physics | Roy S.,se National Center For Basic Science | Chattopadhyay S.,Saha Institute of Nuclear Physics | Datta P.,Ananda Mohan College | And 11 more authors.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2011

A model based on classical particle plus rotor has been used to explore the underlying systematics of even-even Cd isotopes and a self consistent picture for the observed behaviors of 106,108,110Cd has been reported. This systematic study also helps to estimate the strengths of particle-hole and hole-hole interactions of this mass region. © 2010 Elsevier B.V.

Ghosh S.,University of Calcutta | Chakraborty I.,University of Calcutta | Chakraborty M.,Indian Institute of Technology Kharagpur | Mukhopadhyay A.,Bose Institute of India | And 3 more authors.
Biochimica et Biophysica Acta - Biomembranes | Year: 2016

Erythrocyte morphology is gaining importance as a powerful pathological index in identifying the severity of any blood related disease. However, the existing technique of quantitative microscopy is highly time consuming and prone to personalized bias. On the other hand, relatively unexplored, complementary technique based on flow cytometry has not been standardized till date, particularly due to the lack of a proper morphological scoring scale. In this article, we have presented a new approach to formulate a non-empirical scoring scale based on membrane roughness (Rrms) data obtained from atomic force microscopy. Subsequently, the respective morphological quantifier of the whole erythrocyte population, commonly known as morphological index, was expressed as a function of highest correlated statistical parameters of scattered signal profiles generated by flow cytometry. Feed forward artificial neural network model with multilayer perceptron architecture was used to develop the intended functional form. High correlation coefficient (R2 = 0.95), even for model-formulation exclusive samples, clearly indicates the universal validity of the proposed model. Moreover, a direct pathological application of the proposed model has been illustrated in relation to patients, diagnosed to be suffering from a wide variety of cancer. © 2016 Elsevier B.V. All rights reserved.

Rather N.,Saha Institute of Nuclear Physics | Roy S.,Tata Institute of Fundamental Research | Datta P.,Ananda Mohan College | Chattopadhyay S.,Saha Institute of Nuclear Physics | And 8 more authors.
Physical Review C - Nuclear Physics | Year: 2014

The electric quadrupole transition rates for the high-spin yrast states of 104Pd have been measured by using the Doppler-shift attenuation method. These values decrease with the increase of angular momentum, which can be associated with the phenomenon of antimagnetic rotation. In the present work, a numerical calculation based on the semiclassical particle plus rotor model for antimagnetic rotation has been employed, giving a good description of the experimental Routhian and the transition rates and providing conclusive evidence of antimagnetic rotation in a nucleus other than cadmium. © 2014 American Physical Society.

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