21 Result(s)

Chapter

Ion Beams for Materials Engineering—An Overview

Nuclear accelerators have provided revolutionary advances in several disciplines. Starting with the reputation of atom smashers which demonstrated that atoms are not indivisible they provided facilities to exp...

D. K. Avasthi… in Swift Heavy Ions for Materials Engineering and Nanostructuring (2011)

Chapter

Ion Beam Analysis

The Ion Beam Analysis (IBA) techniques are powerful tools to investigate the composition of a material in a non-destructive way. Ion beams im**ing on a material induce several processes simultaneously which ...

D. K. Avasthi… in Swift Heavy Ions for Materials Engineering and Nanostructuring (2011)

Chapter

SHI for Synthesis and Modifications of Nanostructured Materials

Nanostructured materials may be defined as those materials whose structural elements—clusters, crystallites or molecules—have dimensions in 1 to 100 nm range. Their importance for applications is due to remark...

D. K. Avasthi… in Swift Heavy Ions for Materials Engineering and Nanostructuring (2011)

Chapter

Ion Matter Interaction

The ion beam applications, which involve either the modification of the properties of the material or its characterization, stem from the basic interactions of the ions with the target material. The basic phys...

D. K. Avasthi… in Swift Heavy Ions for Materials Engineering and Nanostructuring (2011)

Chapter

Engineering of Materials by Swift Heavy Ion Beam Mixing

Ion beam mixing (IBM) is a phenomenon, at interface between two layers, in which the atoms of one layer mingle with the atoms of the other elements under the influence of ion beam traversal through them. When ...

D. K. Avasthi… in Swift Heavy Ions for Materials Engineering and Nanostructuring (2011)

Chapter

Materials Engineering with Swift Heavy Ions

High energy heavy ions are proving to be important tools in the efforts to modify the properties of materials in a controlled fashion to provide possibility of making them functional for specific applications ...

D. K. Avasthi… in Swift Heavy Ions for Materials Engineering and Nanostructuring (2011)

Article

Heavy ion accelerator and associated developments in india

Developments of ion accelerator and associated facilities in India are presented. Various types of accelerator facilities which are systematically built in the country through sustained development and researc...

G K Mehta in Pramana (2002)

Article

The non-linear dynamics of vortices subjected to correlated and random pinning disorders in a quasi-2D superconductor

Understanding the dynamics of vortex matter subjected to random and correlated pinning disorders in layered superconductors remains a topic of considerable interest. The dynamical behavior of vortices in these...

Leena K. Sahoo, R C Budhani, D Kanjilal, G K Mehta in Pramana (2002)

Article

1/f Noise properties of swift heavy ion irradiated epitaxial thin films of YBCO

Effect of 250 MeV¹⁰⁷Ag ion irradiation induced columnar defects on the noise properties of the YBCO superconductor in the normal and superconducting state have been investigated. Magnitude of the spectral density...

S K Arora, Ravi Kumar, D Kanjilal, G K Mehta, S Khatua… in Bulletin of Materials Science (1999)

Article

X-ray Topography of Strain Fields Induced by 100 MeV Ti⁷⁺ Ion Irradiated Si(100)

The lattice deformation caused by 100 MeV Ti⁷⁺ ion irradiation in Si (100) has been studied using X-ray topographic techniques. An important finding is the appearance of a strain field perpendicular to the ion be...

B. B. Sharma, S. R. Gupta, R. K. Sharma, V. Kumar… in MRS Online Proceedings Library (1995)

Article

Critical exponent of the electrical conductivity in the paracoherence region of a thin film of YBa₂Cu₃O_7−x

Critical exponent of the electrical conductivity in the paracoherence region (γ) of the high temperature superconductor YBa₂Cu₃O_7−x (YBCO) has been estimated for high quality thin film on ZrO₂ su...

Manmeet K Marhas, K Balakrishnan, V Ganesan, R Srinivasan… in Bulletin of Materials Science (1994)

Article

Light-charged particle emission in fission

The emission of light charged particles in the fission process is of interest as they are believed to emerge from the neck region of the deformed fissioning nucleus at a time close to the scission point and ma...

A K Sinha, D M Nadkarni, G K Mehta in Pramana (1989)

Article

Angular distribution in ternary fission

The angular distribution of long-range alpha particles emitted in keV-neutron induced fission of²³⁵U has been measured using a technique which employs only a particle telescope to derive the angular information. ...

M M Sharma, G K Mehta in Pramana (1985)

Article

Long-range alpha emission inP-wave neutron induced fission of²³⁵U

The yield and energy distribution of long-range alpha-particles (lra) emitted from neutron-induced fission of²³⁵U have been measured at neutron energies; thermal, 125±12, 155±11, 185±10, 210±9, 240±9, 365±50 and ...

S C L Sharma, G K Mehta in Pramana (1982)

Article

Diffusion and electrical conductivity studies in some heterophase glasses containing bismuth

Self-diffusion coefficients of sodium in the temperature range 300 to 375° C have been measured for glasses in the system Na₂O-B₂O₃-Bi₂O₃-SiO₂, by using a radioactive tracer technique. All these glasses have a tw...

D. Chakravorty, C. S. Vithlani, G. K. Mehta in Journal of Materials Science (1978)

Article

Yields and energy spectra of light charged particles emitted in neutron induced fission of²³⁵U

The yields and energy spectra of light charged particles emitted in the fission of²³⁵U have been measured in the neutron energy range of 100 keV to 1 MeV. The yield of long range alpha particles is found to incre...

B Krishnarajulu, G K Mehta, R K Choudhury, D M Nadkarni, S S Kapoor in Pramana (1977)

Article

Scission-point distributions in LRA fission

Trajectory calculations were performed using the three-point-charge model. The input parameters took values distributed over a wide range. Using experi mental distributions, each trajectory was assigned a ‘wei...

B Krishnarajulu, G K Mehta in Pramana (1975)

Article

The decay of¹³¹Ba

The decay of¹³¹Ba has been studied by Ge(Li) detector supplemented by Ge(Li)-Ge(Li) fast-slow coincidence and NaI(Tl)-NaI(Tl) sum-coincidence spectrometer. The existence of 31 gamma rays and the levels at 78.8, 1...

R. Singh, C. Rangacharyulu, G. K. Mehta in Zeitschrift für Physik A Hadrons and nuclei (1973)

Article

A note on spectral intensity changes in high-frequency glow discharge in air

N. R. Tawde F.A.Sc., G. K. Mehta in Proceedings of the Indian Academy of Scien… (1946)