Proceedings of the Indian Academy of Sciences - Section A

Raman, C.

doi: 10.1007/BF03049312pmid: N/A

Raman, C.

doi: 10.1007/BF03049313pmid: N/A

Malhotra, P.

doi: 10.1007/BF03049314pmid: N/A

Eight hundred and sixteen nuclear interactions produced by 4·4 GeVπ −-mesons in nuclear emulsion have been obtained by “along the track” scanning procedure. Favourable secondary particles from a selected 290π −-N (pion-nucleon) collisions have been identified by blob-density and multiple scattering measurements. It is found that the pion often persists in theseπ −-N collisions, the average persistence is estimated to be 0·24 per collision. It is estimated thatπ-N andπ-π collisions account for 60% and 28% respectively of the secondary particles. The average number of charged shower particles is 〈n s〉=2·09±0·12, the average number of created charged particles is 〈n e±〉=1·94±0·12, the average number of protons with energy greater than 300 MeV is 〈n p〉=0·15±0·05 and the average number of charged kaons is found to be 〈n k±〉=0·11±0·06. The integral energy spectra of pions in C-system as well as in L-system are well represented by exponential forms. The average inelasticity of the proton in C-system is found to be 0·52±0·10. The charge retention probability for protons inπ −-p collisions is 0·45±0·07.

Simonov, V.

doi: 10.1007/BF03049315pmid: N/A

Rangaswami, S.; Venkateswarlu, P.

doi: 10.1007/BF03049316pmid: N/A

The leaves ofRhododendron grande Wight have been examined for their chemical constituents. Campanulin and friedelin were obtained from the petroleum ether extract, ursolic acid from the ether extract and quercetin and a minor component from the alcoholic extract.

Seshagiri, V.; Krishna Reddy, Y.; Brahmaji Rao, S.

doi: 10.1007/BF03049317pmid: N/A