High-spin states in Zr-89 were populated in the Se-80(C-13, 4n) reaction, and gamma-ray coincidences were measured using the Indian National Gamma Array. The level scheme of Zr-89 has been extended up to spin I = 49/2 with the observation of a new dipole band. Directional correlation and polarization asymmetries of the gamma rays have been measured to determine spin and parity of the levels. Line shapes of several transitions have been analyzed to determine lifetimes of the levels. Possible configurations of the band have been discussed using the cranked Nilsson-Strutinsky model. The calculations suggest a triaxial shape of the nucleus at high spins, and the band may represent rotation of the nucleus about the longest axis.

The positive-parity band structure of Ag-110 has been established for the first time. A new decay path to the isomeric 6(+) state has been observed for this band. The lifetimes of the high spin levels have been measured using the Doppler-shift attenuation method. The comparison of the experimental data with the numerical results of the shears mechanism with principal axis cranking calculation indicates that this band originates due to the tilted axis rotation. On the other hand, it has already been established that the negative-parity levels in the same spin domain originate due to the principal axis rotation.

The positive-parity band of Ag-106 has been extended up to I = 25 (h) over bar and the lifetimes of the high spin levels of this band have been measured. The deduced transition rates decrease with increasing spin until I = 21 (h) over bar. Beyond this spin, the observed transition rates are substantially small and remain nearly constant. This is a novel observation for a shears band. The observed features have been described within the framework of the shears mechanism with a principle axis cranking calculation.

Recently, new non-tensor product splines, called as triangle configuration B-splines (TCB-splines), have been proposed, which generalize the Delaunay configuration B-splines (DCB-splines) by introducing more flexibility in knot geometry while preserving the most attractive properties of univariate B-splines (Liu and Snoeyink, 2007). In this paper, we present a surface reconstruction framework that explores the flexibility of this spline for its use in shape modeling. Starting from a carefully designed feature-sensitive triangulation, we apply the so-call link triangulation procedure to obtain a feature-sensitive configuration family and then construct simplex spline bases as well as spline surface on it. The approximation quality of the surface is then progressively improved by adaptively adding more knots onto the parametric domain according to the fitting errors obtained in the previous fit procedure and updating the feature-sensitive configurations. Conditions to ensure the C1 continuity of the whole result surface are also provided. Our framework is tested on several models to demonstrate its efficacy and ability in preserving geometric features. Compared with DCB-splines, our splines can generate visually pleasant surfaces with smaller fitting errors by using the same number of knots and iterations. With almost the same number of control points, our framework produces more accurate and visually pleasant results than the classical B-spline surface fitting method based on adaptive knot placement strategy (Park, 2011). In addition, the resultant surface provides a control net, which enables an intuitive user interactive design.

Predatory magazines are created by unreliable publishers who, after collecting a fee, publish the submitted paper in the Open Access (OA) formula without providing substantive control. For the purpose of “encouraging” authors to submit their work, they often impersonate existing periodicals by using a similar-sounding title, a similar webpage, and copied names of editors of the editorial board. They also offer credits close in name to the Impact Factor. The purpose of such activity is to deceive authors and to earn money in an unfair manner. This contribution presents mechanisms used by such journals and includes suggestions for protection from the duplicity and the subsequent disappointment of publishing, often for an exorbitant fee.

Over the past year, there has been constant debate in various journals on the circular issued by the Medical Council of India (MCI) in September 2015, regarding the requirements for promotion of teaching faculty. The lack of a time-bound promotion system of medical faculty results in higher stress, dissatisfaction, lower productivity and quality of life and work. The critics have highlighted several issues in assessment of publication for teacher's promotion, eg the exclusion of publications in "electronic-only" journals, awarding points only to "original research" papers and first or second authors, listing of indexing databases for journals, categorising journals as national or international.

The high-spin states in Cs-133, populated using the reaction Te-130(Li-7, 4n) with 45-MeV beam energy, have been extended up to an excitation energy of 5.265 MeV using the Indian National Gamma Array. The observed one- and three-quasiparticle bands in Cs-133, built on the pi h(11/2), pi g(7/2), pi d(5/2); and (pi g(7/2)pi d(5/2))(1) circle times vh(11/2)(-2) configurations, respectively, have similar structure as seen in the lighter odd-A Cs isotopes. The experimental level scheme has been compared with the large-scale shell model calculation without truncation using the jj55pna interaction, showing a good agreement for both positive- and negative-parity states.

Excited states in the Pd-101 isotope were investigated following the As-75(P-31, 2p3n)Pd-101 reaction at E-lab = 125 MeV. In-beam gamma-ray measurements were performed using the Indian National Gamma Array (INGA) spectrometer consisting of 21 Compton-suppressed clover detectors. Level lifetimes have been measured for the negative-parity nu h(11/2) band in Pd-101 using the Doppler-shift attenuation method up to the 43/2(-) state and are found to differ substantially from the recently reported values. The deduced quadrupole transition rates exhibit a monotonically decreasing behaviour with increasing angular momentum in the spin range 31/2 (h) over bar <= I <= 43/2 (h) over bar along with large I(2)/B(E2) values (> 300 (h) over bar (MeV-1)-Me-2(eb)(-2)). Using the semiclassical particle-rotor model, the observed band characteristics are interpreted as antimagnetic rotation based on the pi(g(9/2))(-2) circle times nu[h(11/2) (g(7/2))](2) configuration. The configuration assignment is also favoured by the cranking shell model calculations.

The low-lying states of 108Ag near the I π = 6+ isomer have been investigated with the 11B + 100Mo reaction at 39 MeV beam energy. We aim at understanding the structure of the states near the isomer and identifying possible isomer depletion paths. From the γ–γ and γ–γ–γ coincidence analysis, spectroscopy of the excited states near the isomer has been carried out to establish new transitions and modification of the previously known level scheme. The present work suggests a total of three possible transitions at energies below 500 keV from the isomer to higher excited levels, whose subsequent decay can branch to the ground state. The spins and parities of these states have been established with angular correlation and polarization measurements. The branching ratios and multipolarities of the associated γ-rays were used in the estimation of the integral cross section for induced isomer depletion via these states. The experimental data have been compared to the results of projected Hartree–Fock calculations to understand the configurations of the levels.

The negative parity non-yrast band of Ag-106 has been studied to investigate the falling trend in magnetic dipole transition rates. In this context, the level lifetimes of the excited levels of this band have been measured using the Doppler shift attenuation method. The comparison of the experimental Routhian and the transition rates with the numerical results of the shears mechanism with the principal axis cranking calculation indicates that this band is generated due to the shears mechanism involving the three proton hole configuration.

Purnima Singh, R. Palit, D. Choudhury, S. Biswas, S. Saha, J. Sethi, C. Ghosh, H. C. Jain, P. C. Srivastava, S. Mukhopadhyay, D. C. Biswas, L. S. Danu, A. Asgar, G. Mukherjee , R. Raut, S. S. Ghugre, A . K. Sinha, S. K. Tandel, and S. Muralithar Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400005, India Department of Physics, Indian Institute of Technology, Roorkee-247667, India Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Kolkata 700064, India UGC-DAE Consortium for Scientific Research, Kolkata Centre, Kolkata 700098, India UM-DAE Centre for Excellence in Basic Sciences, Mumbai 400098, India and Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India

A comprehensive study of the low-lying states of 108Ag, near the isomeric state at E i = 110 keV with J π = 6 + and T 1/2 = 438 y, has been presented. Spectroscopy of these states has been carried out using the reaction 100 Mo( 11 B, 3nγ) 108 Ag at 39 MeV beam energy using INGA. The multipolarities and electromagnetic nature of the transitions have been assigned based on the angular correlation and polarization measurements. The experimentally identified states have been compared to the results of the Projected Hartree-Fock calculations to understand the configurations involved in these states.

Negative parity high-spin states of Cd-107 have been investigated using the reaction Zr-94(O-18, 5n), from the gamma-ray coincidence events recorded by the Indian National Gamma Array. A magnetic dipole (M1) band structure was established for the first time in this nucleus decaying to the low-spin states via several paths. Lifetimes of five in-band levels in this band have been measured using the Doppler shift attenuation method. The experimentally deduced B(M1) values are found to decrease with increasing spin. The experimental observations, interpreted by the tilted axis cranking calculations, suggest that the M1 band is developed from the shears mechanism based on the 5qp configuration pi(g(9/2)(-2)) circle times nu(h(11/2)g(7/2)(2)), which is then crossed by another 5qp configuration pi(g(9/2)(-2)) circle times (h(11/2)(3)). The semiclassical model of the shears mechanism also reasonably reproduces the decreasing trend of the observed B(M1) values as a function of spin, supporting the above interpretation. The present work highlights the unique coexistence of both magnetic and antimagnetic (observed by us earlier) rotation bands in one nucleus arising from the same proton configuration, but different neutron configurations.

The high spin states in A = 75, Kr and Br isotopes have been populated via fusion-evaporation reaction at an incident beam energy of 90 MeV. The de-exciting gamma-rays were detected utilizing the Indian National Gamma Array (INGA). Lifetime of these excited high spin states were determined by Doppler-shift attenuation method. Experimental results obtained from lifetime measurement are interpreted in the frame work of projected shell-model to get better insight into the evolution of collectivity. Comparison of the calculations of the model with transitional quadrupole moments Q(t) of the positive and negative parity bands firmly established their configurations.

The lifetimes of the excited levels for the two nearly degenerate bands of $^{106}\mathrm{Ag}$ have been measured using the Doppler-shift attenuation method. The deduced $B(E2)$ and $B(M1)$ rates in the two bands are found to be similar, except around the band crossing spin, while their moments of inertia are quite different. This is a novel observation for a nearly degenerate doublet band.

The electric quadrupole transition rates for the high-spin yrast states of Pd-104 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.

The nuclei approaching the neutron and proton major shell closures at N=Z=50 provide a unique opportunity to study interplay between the single-particle and collective degrees of freedom, and influence of the valence orbitals on deformation. The proton particlehole excitations across the major shell gap are energetically possible due to the strong proton-pair correlations and proton-neutron interaction between the spin-orbit partner orbitals [1]. For the nuclei approaching Z = 50 from below, the proton Fermi surface lies near the oblate-driving high-Ω orbitals of the intruder πg9/2 subshell. Strongly prolatedriving low-Ω νh11/2 subshell orbitals are accessible at low excitation energies for the nuclei receding the N = 50 shell closure. The delicate interplay of strongly shape-driving πg9/2 and νh11/2 orbitals can influence the overall shape of the nucleus, and result in γ-soft (triaxial) shapes with modest deformation ( 2) ≈ 0.15 [2]. The relevant intringuing triaxiality based phenomena such as magnetic rotation [3] and degenrate twin bands have been reported in this mass region [4]. One of the novel feature which has been observed in this region is antimagnetic rotation (AMR) bands around doubly magic nuclei [5], where two pairs of nucleons in a twin-shears configurations are aligned back to back. In AMR, the E2 crossover transitions are weak and is similar to normal rotational band. Lifetime measurements show a decrease in B(E2) values with increasing spin in AMR. In recently observed phenomenon, “ Nuclear tidal wave ”

The high spin structure of 108Ag nucleus has been studied using the reaction 11B + 100Mo at 39 MeV with Indian National Gamma Array (INGA) at TIFR-BARC accelerator facility. From the two- and higher-fold coincidence analysis of the emitted γ-rays, the level structure of the nucleus is built, with addition of around ∼ 60 new transitions. A new positive parity dipole band has been observed and significant additions have been made in the low spin region. A pair of nearly degenerate, negative parity, dipole bands is established, which is studied using the triaxial projected shell model (TPSM).

The electric quadrupole transition rates for the high spin yrast states of 104 Pd have been measured by using the DSAM technique. These values decrease with the increase of angular momentum which is a signature of anti-magnetic rotation. A numerical calcula- tion based on semi-classical particle plus rotor model for anti-magnetic rotation gives a good description of the experimental routhian and the transition rates. This is the first observation of AMR in a nucleus other than Cadmium.