• K N Chaudhari

      Articles written in Proceedings – Section A

    • Three examples ofΛBe7 hyperfragments

      K N Chaudhari S N Ganguli N K Rao M S Swami

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      In a systematic study of hyperfragments (HFs), three uniquely identified examples ofΛBe7 hyperfragments have been observed; one of them decayed byπ−1-mesic mode and the other two by non-mesic modes. The data from the presentπmesic decay ofΛBe7 when combined with that from the other two similar events reported in the literature, yielded a mean binding energy of 4·99±0·36 MeV for Λo relative to the lowest level of Be6.

    • Study of hyperfragments - Part III. Multinucleon interactions of Λ° in hyperfragments

      D P Burte K N Chaudhari S N Ganguli N K Rao M S Swami

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      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.

    • Study of hyperfragments - Part IV. Mechanism for production of hyperfragments

      D P Burte K N Chaudhari S N Ganguli N K Rao M S Swami

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      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 (a) long-range HFs (R⩾20µm.) which are due to fragments with mass number ≲15, are produced in the evaporation stage of the disintegrations of Ag and Br nuclei of emulsion, (b) short-range HFs (R⩽10µm.) are mainly due to residues of the target nuclei and a small fraction (≈10%) of them in the range 5<RHF⩽15µm. are due to fission type of processes that occur in high energy interactions and (c) the relative probability of sticking of Λ° to fragments withZ=2 to that with 3⩽Z⩽6 is roughly in the ratio 1:10.

    • Study of hyperfragments - Part V. Analysis of light hyperfragments

      K N Chaudhari S N Ganguli N K Rao M S Swami

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      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 toπ mesic events and S, the ratio of neutron to proton stimulated events as a function of charge of HFs. Q is found to increase rapidly with the increase in charge of HFs; the value of Q for HFs of Z⩾3 is 14·6±3·0 which is high compared to the theoretical value of about 4 to 5. The value of S is found to be >1 for all HFs of Z≥2.

    • Binding energy andπ+ decay of light hyperfragments

      K N Chaudhari S N Ganguli N K Rao M S Swami A Gurtu J M Kohli M B Singh

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      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 2π+ decay events of hyperfragments the branching ratio ofAH4 decaying byπ+ toπ mode is found to be (1·5±1·0)%.

    • The ratio of non-mesic to π-mesic decay of light hyperfragments

      K N Chaudhari S N Ganguli N K Rao M S Swami A Gurtu M B Singh

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      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.

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