K P Rajeev
Articles written in Pramana – Journal of Physics
Volume 30 Issue 1 January 1988 pp 29-33 Instrumentation
A simple apparatus for the measurement of thermoelectric power in the temperature range 4·2–300K
A simple apparatus to measure the absolute thermoelectric power of solids in the temperature range 4·2–300K is described. The cryostat and the associated instrumentation is simple to operate. Representative data of measurements on metallic wire and pressed pellets are given. An accuracy of better than 10% in absolute thermopower can be obtained in this apparatus.
Volume 39 Issue 4 October 1992 pp 391-404
An automated thermal relaxation calorimeter for operation at low temperature (0.5 K<
S Banerjee M W J Prins K P Rajeev A K Raychaudhuri
We describe an automated calorimeter for measurement of specific heat in the temperature range 10 K>
Volume 96 All articles Published: 5 May 2022 Article ID 0096 Research Article
Photon-induced low-energy nuclear reactions
PANKAJ JAIN ANKIT KUMAR RAJ PALA K P RAJEEV
We propose a new mechanism for inducing low-energy nuclear reactions (LENRs). The process is initiated by a perturbation which we assumed to be caused by absorption or emission of a photon. Due to the electromagnetic perturbation, the initial two-body nuclear state forms an intermediate state to make a transition into the final nuclear state through the action of another perturbation. In the present paper,we take the second perturbation to be also electromagnetic. We need to sum over all energies of the intermediate state. Since the upper limit on this sum is infinity it is possible to get contributions from very high energies for which the barrier penetration factor is not too small. By considering a specific reaction, we determine the conditions under which this mechanism may lead to significantly enhanced reaction rates. We find that the mechanism leads to very small cross-sections in free space. However, in a condensed medium, there exist several possibilities leading to enhanced cross-sections, which may lead to observable reaction rates even at relatively low energies. Hence we argue that LENRs are possible and provide a theoretical set-up which may explain some of the experimental claims in this field.
Volume 97, 2023
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