JINR rapid communications

The present collection of rapid communications from JINR, Dubna, contains seven separate reports on the identification of events with a secondary vertex in the experiment EXCHARM, the zero degree calorimeter for CERN WA-98 experiment, a new approach to increase the resource of installation elements for super-high energy physics, a method of the in-flight production of exotic systems in the charge-exchange reactions, the neutron activation analysis for monitoring northern terrestrial ecosystems, a search for 28O and study of the neutron-rich nuclei near the neutron closure N=20, a search for new neutron-rich nuclei with a 70A MeV 48Ca beam. 33 figs., 4 tabs