ELECTROMAGNETIC RESEARCH DIVISION SEMIANNUAL PROGRESS REPORT FOR PERIOD ENDING MARCH 20, 1953

A number of new reactions, some of them of a nuclearfusion type, were observed in the 63-in. N cyclotron. Angular distributions of particles produced in nuclear reactions were measured extensively with the internal beam of the 86- in. cyclotron. Trial production of a numberof radioisotopes in this cyclotron revealed that significant reductions in the cost of cyclotron-produced isotopes can be expected. New techniques are being developed which will contribute to the plans for the deflection of the beam of the 86-in. cyclotron. Preliminary design studies were made for a variable-energy cyclotron and for an 80-Mev heavy- particle cyclotron. The program for the separation of Pu isotopes has advanced to the point where it is clear that such separation is feasible. A study program involving small package-type reactors was started. (auth)