Evaluation of ⁹⁹Mo and ^99𝑚Tc Productions Based on a High-Performance Cyclotron

Table 5

The calculated integral yields (mCi/𝜇A) at EOB after 3 and 6 hours irradiations for the expected Tc radioactive species inside the target. 99.05% 100Mo-enriched metallic molybdenum in the optimized target configuration irradiated at 15, 20, and 25 MeV is considered. The whole list of all Mo, Nb, and Zr radioactive yields is not reported here for the sake of brevity.

Product	𝑡1/2	3 h irradiation			6 h irradiation
		15 MeV	20 MeV	25 MeV	15 MeV	20 MeV	25 MeV
100Tc	15.46 s	2.357𝐸+01	3.871𝐸+01	5.427𝐸+01	2.357𝐸+01	3.871𝐸+01	5.427𝐸+01
99𝑚Tc	6.01 h	1.428𝐸+01	2.781𝐸+01	3.321𝐸+01	2.438𝐸+01	4.756𝐸+01	5.707𝐸+01
99𝑔Tc	2.1⋅10^5 y	1.867𝐸−07	4.525𝐸−07	5.804𝐸−07	3.871𝐸−07	9.339𝐸−07	1.204𝐸−06
98Tc	4.2⋅10^6 y	3.696𝐸−11	2.383𝐸−09	1.737𝐸−08	7.392𝐸−11	4.766𝐸−09	3.475𝐸−08
97𝑚Tc	91 d	2.122𝐸−04	4.792𝐸−04	6.994𝐸−04	4.241𝐸−04	9.580𝐸−04	1.398𝐸−03
97𝑔Tc	4.2⋅10^6 y	4.037𝐸−11	1.197𝐸−10	2.156𝐸−10	8.075𝐸−11	2.394𝐸−10	4.312𝐸−10
96𝑚Tc	51.5 m	8.741𝐸−02	1.567𝐸−01	4.117𝐸−01	9.516𝐸−02	1.706𝐸−01	4.483𝐸−01
96𝑔Tc	4.28 d	3.230𝐸−03	6.209𝐸−03	2.294𝐸−02	7.040𝐸−03	1.345𝐸−02	4.846𝐸−02
95𝑚Tc	61 d	7.551𝐸−05	1.849𝐸−04	2.806𝐸−04	1.509𝐸−04	3.696𝐸−04	5.607𝐸−04
95𝑔Tc	20 h	1.722𝐸−02	4.414𝐸−02	7.529𝐸−02	3.275𝐸−02	8.393𝐸−02	1.431𝐸−01
94𝑚Tc	52 min	2.744𝐸−02	6.489𝐸−02	9.470𝐸−02	2.993𝐸−02	7.078𝐸−02	1.033𝐸−01
94𝑔Tc	293 min	3.409𝐸−02	1.094𝐸−01	1.951𝐸−01	5.637𝐸−02	1.809𝐸−01	3.225𝐸−01
93𝑚Tc	43.5 min	6.191𝐸−04	1.525𝐸−02	3.005𝐸−02	6.543𝐸−04	1.612𝐸−02	3.176𝐸−02
93𝑔Tc	2.75 h	2.318𝐸−03	4.935𝐸−02	1.218𝐸−01	3.476𝐸−03	7.426𝐸−02	1.824𝐸−01
92Tc	4.25 min	5.181𝐸−02	1.017𝐸−01	1.152𝐸−01	5.181𝐸−02	1.017𝐸−01	1.152𝐸−01
91𝑚Tc	3.3 min	0.000𝐸+00	0.000𝐸+00	2.595𝐸−03	0.000𝐸+00	0.000𝐸+00	2.595𝐸−03
91𝑔Tc	3.14 min	0.000𝐸+00	9.369𝐸−06	1.190𝐸−02	0.000𝐸+00	9.369𝐸−06	1.190𝐸−02