Fission Yield Fine Structure in the Mass Region 99-106

Discovery of yttrium, zirconium, niobium, technetium, and ruthenium isotopes

“…[The until now unknown half-life of the daughter substance of one of the molybdenum fission products with a half-life of about 11 min (102?) was measured and was found to be 5±1 s.] This half-life agrees with the presently accepted value of 5.28(15) s. The mass of the mentioned molybdenum isotope had been determined less than a month earlier[142].…”

Discovery of rubidium, strontium, molybdenum, and rhodium isotopes

“…The isotopes were produced using projectile fission of 238 U at 750 MeV/nucleon on a lead target. "Forward emitted fragments from 80 Zn up to 155 Ce were analyzed with the Fragment Separator (FRS) and unambiguously identified by The discovery of 115 Mo, 116 Mo, and 117 Mo was reported in the 2010 article "Identification of 45 new neutron-rich isotopes produced by in-flight fission of a 238 U beam at 345 MeV/nucleon," by Ohnishi et al [65]. The experiment was performed at the RI Beam Factory at RIKEN, where the new isotopes were created by in-flight fission of a 345…”

“…During the experiment, eight counts for 114 Mo were recorded.4.25. 115−117 MoThe discovery of115 Mo,116 Mo, and117 Mo was reported in the 2010 article "Identification of 45 new neutron-rich isotopes produced by in-flight fission of a 238 U beam at 345 MeV/nucleon," by Ohnishi et al[65]. The experiment was performed at the RI Beam Factory at RIKEN, where the new isotopes were created by in-flight fission of a 345MeV/nucleon 238 U beam on a beryllium target.…”

Separation of Fission 99Mo on Charcoal Columns Impregnated with Tin(IV) Chloride for Use in Preparation of 99mTc Generators

“…The need for high activity 99m Tc generators and the limited capacity of alumina for molybdate ions made 235 U fission reaction the best source to provide high specific activity "Mo [9 -13], 235 U fission reaction results in the production of more than 35 elements with approximately 200 no carrier added radionuclides including "Mo with 6.25% fission yield [1,2]. Chromatographic column techniques are generally preferred for the separation of fission-"Mo than solvent extraction [14][15][16][17][18] and precipitation [19 -22]. In this respect, "Mo was separated from different fission solutions by adsorption on alumina [23,24], silver-coated alumina [10,25], silver-coated charcoal [26,27] and organic exchangers [12,28].…”