• Arun K Jain

      Articles written in Pramana – Journal of Physics

    • Low energyK+ scattering onN =Z nuclei

      Swapan Das Arun K Jain

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      The data for the total cross-section ofK+ scattering on various nuclei have been analysed in the Glauber multiple scattering theory. Energy-dependentK+-nucleus optical potential is generated using the forwardK+-nucleon scattering amplitude and the nuclear density distribution. Along with this, the calculated totalK+-nucleus cross-sections using the effectiveK+-nucleon crosssection inside the nucleus are also presented.

    • Search for non-strange dibaryons

      Arun K Jain

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      Inspite of tremendous interest there has been sporadic searches for dibaryon resonances in the past few decades. The main hurdle one faces in this search is their identification, their signature and practically no guide to their location. With the identification of the pentaquark-θ+ resonance one is encouraged to look for the discovery of strange dibaryons also. However where and how to look for non-strange dibaryons is not clear. The transition from a bipolar to a unipolar non-strange dibaryon may possibly be seen in the (p, 2p) reactions on heavy nuclei. The change of the finite size of thep-p interaction vertex can be identified as a sudden change in the extracted DWIA spectroscopic factor. The DWIA anomalies are to be searched for in the existing (p, 2p) reaction data for the identification of non-strange dibaryons

    • Electric dipolarizability of 7Li

      Sudhir R Jain Arun K Jain S Kailas

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      We calculate the electric dipolarizability of 7Li nucleus within the cluster model and estimate a value of about 0.0188 fm3. We also discuss the possibility of observing this in the scattering of 7Li from a 208Pb target at energies about 30 MeV.

    • Cluster knockout reactions

      Arun K Jain B N Joshi

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      Cluster knockout reactions are expected to reveal the amount of clustering (such as that of 𝛼, d and even of heavier clusters such as 12C, 16O etc.) in the target nucleus. In simple terms, incident medium high-energy nuclear projectile interacts strongly with the cluster (present in the target nucleus) as if it were existing as a free entity. Theoretically, the relatively softer interactions of the two outgoing particles with the residual nucleus lead to optical distortions and are treated in terms of distorted wave (DW) formalism. The long-range projectile–cluster interaction is accounted for, in terms of the finite range (FR) direct reaction formalism, as against the more commonly adopted zero-range (ZR) distorted wave impulse approximation (DWIA) formalism. Comparison of the DWIA calculations with the observed data provide information about the momentum distribution and the clustering spectroscopic factor of the target nucleus. Interesting results and some recent advancements in the area of (𝛼, 2𝛼) reactions and heavy cluster knockout reactions are discussed. Importance of the finite-range vertex and the final-state interactions are brought out.

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