134 citations · 230 across the 7 of their papers we have counts for
8 papers
Long Tail of Quantum Decay from Scattering Data
M. Nowakowski, N. G. Kelkar
Whereas the short time behaviour of an unstable quantum mechanical system is well understood from its theoretical as well as experimental side, the long time tail of the very same…
Analysis of averaged multichannel delay times
N. G. Kelkar, M. Nowakowski
The physical significances and the pros and cons involved in the usage of different time delay formalisms are discussed. The delay time matrix introduced by Eisenbud, where only s-…
Comment on "Hadronic He production near threshold"
K. P. Khemchandani, N. G. Kelkar, B. K. Jain
Measurements of the differential and total cross sections for the He reaction at five energies were recently reported [Phys. Rev. C {\bf 75}, 014004 (2007)] and com…
Critical view of WKB decay widths
N. G. Kelkar, H. M. Castaneda
A detailed comparison of the expressions for the decay widths obtained within the semiclassical WKB approximation using different approaches to the tunneling problem is performed.…
Quantum reflection and dwell times of metastable states
Neelima G. Kelkar
The concept of phase and dwell times used in tunneling is extended to quantum collisions to derive a relation between the phase and dwell time delays in scattering. This relation c…
A study of the reaction
N. J. Upadhyay, K. P. Khemchandani, B. K. Jain +1
A study of the reaction in the energy range where the recent data from Uppsala are available, is done in the two-step model of production including the final st…