Vol 11 No 2

Asian

Journal of Physics

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Volume 11 Number 2 April-June 2002

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Proceedings

of The National Conference

Lasers & Spectroscopy

Vol 11, No 2, 2002

Asian Journal of Physics

(An International Quarterly Research Journal of Physics)

(A Non-Profitable Registered Publication)

CONTENTS

Fiber-optic sensors based on evanescent field absorption spectroscopy

B D Gupta 145

Measurements of various minor constituents using a differential absorption LIDAR

B C Arya, S L Jain and Arun Kumar 163

Synthetic and magneto studies of some six-coordinated complexes of lanthanide(III) perchlorates derived from

4-[N-4-methoxybenzylidene)amino] antipyrene thiosemicarbazine

Ram K Agarwal, Ms Neetu Goel and Alok K Sharma 171

Synthesis and spectral characterization of some mixed ligand complexes of thorium (IV) with

semicarbazone of 4-aminoantipyrine and dimethyl sulphoxide

Ram K Agarwal and Narendra K Sharma 174

Characterisation and antihypertensive activity of 1-[(2h)-(6-substituted)-1,4-benxoxazine-

3-one]-3-(1-naphthyloxy)-2-propanol derivatives

Sachin M Wani, Shivajirao S Kadam and Anees A Siddiqui 177

Determination of optimal detector geometry for sampling of Fourier transform of

fingerprints for classification using neural networks

Dinesh Ganotra, Joby Joseph and Kehar Singh 181

Spiral probe for fiber optic evanescent field absorption spectroscopy

S K Khijwania and B D Gupta 187

Spectroscopic properties of Ho³⁺: Lithium chloroborate glasses

J V Sathyanarayana 191

Spectroscopic study of vacuum evaporated crystalline zinc selenide thin films

Beer Pal Singh, Virendra Singh, Lokendra Kumar, Preeti Dwivedi and T P Sharma 199

Early detection of cancer: Laser spectroscopy methods

G Ullas, K Venkatakrishna, Reena Mary Joseph, C Murali Krishna and V B Kartha 204

XRD study of Lekhapani coal

D K Kalita, R K Boruah, G D Baruah and O P Sahu 213

Fluorescence and photoacoustic spectra of Eu+Ho in Ca_Li-Bo glass

S Rai and G D Baruah 217

Diffuse reflectance UV-VIS spectroscopic study on ZSM-5 surface chemically modified

by tetraethyle ortho-silicate deposition

Indu Shekhar, S NM Dhir, P Vijayanand and Lalji Dixit 221

Formation of intermetallic compounds on the surface of aluminium alloy with Fe-Ni using laser alloying

N Ravi, D Sasti Kumar, N Subramanian, A K Nath and A Ramalingam 225

Application of Nakagaki and Hanazaki model on the aryl CH overtone spectra of

liquid phase o-chlorotoluene and m-chlorotoluene

Shibu M Eappen, R Rekha, S Shaji, T M A Rasheed and KPR Nair 232

Extension of virial theorem approach of Redington to higher order vibrational problems

D John Thruvadigal, S Sampath Krishnan and S Gnanasekaran 238

Vibrational analysis of 2-fluoropropene

D John Thruvadigal, S Sampath Krishnan and S Gnanasekaran 241

Optical studies of few kidney and bladder stones

S Bhattacharyya, R Barua and G D Baruah 244

Comparison of the detuning effects on the mode-locked pulse width in actively

mode-locked broad band and narrow band lasers

HKT Kumar 250

Studies on miscibility behavior of blend of cellulose acetate with polybutylacrylate

S Gunasekaran, B Krsihnan, N Radhakrishnan, J Balaji and V Rumugam 253

Anisotropic properties of a few nematic compounds

TVS Arunmurthy, S D Wakde and V R Murthy 256

Spectroscopic investigation on diethyl carbamazine citrate

R K Natarajan, S Gunasekaran and K Santhosam 258

The effect of electromagnetic radiation on the blood of Swiee albino

K M Umarajan, O S Vivekanandan, S Karunakaran and S Gunasekaran 262

Asian Journal of Physics Vol 11, No 2, (2002) 199-203

Spectroscopic study of vacuum evaporated crystalline Zinc Selenide thin films

Beer Pal Singh, Virendra Singh, Lokendra Kumar, Preeti Dwivedi* and T P Sharma

Thin Films Laboratory, Department of Physics, C C S University Meerut, Meerut-250 004, India

* Department of Physics, V S S D College, Kanpur-208 002, India.

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Vacuum evaporated crystalline films of Zinc Selenide (ZnSe) have been characterized by using optical spectroscopy (especially absorption and transmission spectroscopy). Crystalline ZnSe films have been deposited by vacuum evaporation technique on highly clean glass substrates and their optical properties (energy band gap, refractive index and extinction coefficient) have been studied. The energy band gap (E_g) of the films has been calculated from absorption spectra by using Tauc relation. The transmission spectra in the spectral range 400-850 nm has been used to calculate the refractive index (n), extinction coefficient (k) and wavelength dependence of n and k of the films have been studied. Optical spectroscopy of the films have been done with the help of the Hitachi spectrophotometer model U-3400.

ASIAN JOURNAL OF PHYSICS