Proceedings of the Indian Academy of Sciences - Section A

Nayar, S.

doi: 10.1007/BF03050803pmid: N/A

The elastic wave propagation in orthorhombic crystals has been studied and a condition has been derived for the existence of internal conical refraction for crystals belonging to this class. It is shown that the direction in which ICR occurs is given by the roots of a quadratic equation. Expressions have been derived for the angle of the cone and other parameters relating to the cone for the three principal planes, and these have been numerically evaluated for Barytes, Celestites, and lodic acid.

Chowdhuri, B.; Saxena, Y.

doi: 10.1007/BF03050804pmid: N/A

An investigation on the showers, produced by high energy muons at depth of 580 m.w.e. (metre water equivalent) at Kolar Gold Field has been carried out. We have found that in most of the cases it is possible to interpret the events as electro-magnetic cascades accompanied by high energy muons which are present at the underground level. A few underground showers were found to be accompanied by multiple penetrating particles 3 or more in number with projected linear spread of ⪞ 40 cm.

Dahiya, H.; Singh, B.

doi: 10.1007/BF03050805pmid: N/A

Beta→ gamma→ gamma angular correlation studies are done for the following two cascades in Te124 from the decay of Sb124. (i) Beta-rays of Emax. 622 KeV → gamma-rays of 1691 KeV→ gamma-rays of 603 KeV; (ii) Beta-rays of Emax. 222 KeV → gamma-rays of 2091 KeV → gamma-rays of 603 KeV;

Singh, Maharaj; Sarma, G.

doi: 10.1007/BF03050806pmid: N/A

In this paper, the temperature distribution at the surface of an infinite yawed wedge, when temperature of the main-stream is constant, is studied under two cases; one when temperature gradient of the wall is steady and the velocity of the main-stream is unsteady, and the other when temperature gradient of the wall is unsteady and the velocity of the main-stream is steady. It is found that the heat transfer depends on the wedge angle, the angle parameter and the yaw of the wedge. The behaviour with these parameters are studied and are illustrated graphically.