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Abstract：
Calculations have been performed for the energy separation of the two major substitutional states of the hypernucleus 40ΛCa. The (K－,π－) cross sections are calculated in the framework of the distorted-wave impulse approximation. Information about the ΛN interaction is then extracted, particularly, on the effects of the strength parameters on cross sections. The result shows that the ΛN interaction adopted previously for the 1p shell hypernuclei might be suitable to use for the (K－,π－) reaction in which medium heavy hypernucleus 40ΛCa are produced, but the value for the strength parameter of the central potential has to be changed from 0.99 to 0.78.
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