N K Rao
Articles written in Proceedings – Section A
Volume 64 Issue 1 July 1966 pp 51-56
In a systematic study of hyperfragments (HFs), three uniquely identified examples ofΛBe7 hyperfragments have been observed; one of them decayed by
Volume 64 Issue 4 October 1966 pp 203-212
1101 examples of non-mesic decay of hyperfragments, produced by high energy particles in nuclear emulsion stacks, have been used to obtain information on multinucleon interaction of Λ° hyperon in the decay of hyperfragments. From a study of events with two fast charged particles in decays of hyperfragments, the following two conclusions are drawn: (i) multinucleon interactions of Λ° in decay of hyperfragments is not significant; it occurs at the most in a few per cent of the cases, and (ii) there is strong evidence for the existence of final state interactions in decay of hyperfragments.
Volume 64 Issue 4 October 1966 pp 213-223
Hyperfragments (HFs) produced in interactions of high energy pions and protons with emulsion nuclei have been investigated to deduce information on their mechanism of production. From these studies it is concluded that (
Volume 65 Issue 1 January 1967 pp 19-24
Nuclear emulsions exposed to the cosmic radiation over Hyderabad, India, at an altitude of 31·3 km. for six hours, have been used to derermine primary cosmic ray deuteron flux. The flux of deuterons of rigidity ⩾16·9 GV at the top of the atmosphere is found to be <10 m.−2 sec.−1 sterad−1; this may be compared with the proton fiux of 83±12 m.−2 sec.−1 sterad.−1 in the same rigidity region over Hyderabad.
Volume 65 Issue 4 April 1967 pp 240-255
464 non-mesic and 65 mesic decay of hyperfragments (HFs) produced by pions of momenta 3·5 GeV/c. and 17·2 GeV/c. and protons of momentum 23 GeV/c., have been used to obtain information on Q−, the ratio of non-mesic to
Volume 68 Issue 5 November 1968 pp 228-243
Binding energy values of hyperfragments from a sample of 541 uniquely identified mesic decays with mass numbers A=3 to 14 are presented. There does not seem to be any detectable difference in the binding energy value of Λ inAH4 obtained from its two-body and three-body decay modes. Within statistical error, the binding energy values of Λ inAH4 andAH4 are also the same. From a sample of 2
Volume 69 Issue 2 February 1969 pp 78-87
A new method of obtaining the charge spectrum of light hyperfragments from their residual range distribution is described. This method has been used to determine the ratio (Q−) of non-mesic to π−-mesic decay of light hyperfragments. The values of Q− for hyperfragments of different charges are found to be in good agreement with theoretical calculations of Dalitz.
Volume 71 Issue 1 January 1970 pp 32-41
An attempt has been made to detect narrow resonant states ofΛHe5* (I = 2),ΛLi6 andΛBe9* (I = 1) from amongst a sample of 128 uniquely identifiedΛH4 and 195 uniquely identifiedΛHe5 hypernuclei produced by stopping Krmesons in a nuclear emulsion stack. From the experimental data presented, it is concluded that the production of any of these resonant states is not appreciable; upper limits of 20% and 15% are set for the proportion ofΛHe5 resulting from the decay ofΛLi6 andΛBe9* respectively.
Volume 71 Issue 3 March 1970 pp 101-110
From an analysis of 468 hypernuclei (HFs) with ranges > 120 μm, the non-mesic to π−-mesic ratio (Q−) forΛHe andΛHe5 HFs was found to be 1.37 ±0.17 and 1.58
Volume 71 Issue 6 June 1970 pp 257-265
The excited states of Li4, Li5 and Be8 have been investigated by studying the final state interactions in the π−-mesic decays ofΛHe4,ΛHe5 andΛLi8 respectively. The experimental results indicate the existence of final states like Li5* at 1·8 MeV and Be8* at 0 and 2·9 MeV to be dominant in the decay ofΛHe5* andΛLi8 respectively; the results on the decay ofΛHe4 suggest the presence of a Li4* state at about 4 MeV to dominate.