153 citations · 1.9k across the 70 of their papers we have counts for
4 papers · 1 filter
A solar tornado triggered by flares?
N. K. Panesar, D. E. Innes, S. K. Tiwari +1
Solar tornados are dynamical, conspicuously helical magnetic structures mainly observed as a prominence activity. We investigate and propose a triggering mechanism for the solar to…
Study of amplified emission in polycrystalline ZnO below characteristic temperature
Sanjiv Kumar Tiwari
We report on amplified emission in polycrystalline ZnO below 100K. At 6K emission is due to free exciton FXn=1 A (3.378 eV), bound exciton D1XA (3.347 eV), donor acceptor pair DAP…
Defect related photoluminescence and EPR study of sintered polycrystalline ZnO
Sanjiv Kumar Tiwari
We report on low temperature photoluminescence (PL) and EPR study of bulk polycrystalline ZnO . Variation of peak position of donor bound exciton transition (D1XA) and FXAn=1-1LO w…
Low temperature photoluminescence study of polycrystalline ZnO
Sanjiv Kumar Tiwari
We report on low temperature photoluminescence study of ZnO. The photoluminescence profile at 6K reveals FXA n=1, FXn=2A and FXn=1B peaks at 367.04 nm, 363.17 nm and 365.66 nm resp…