Measured Yields from Uranium Carbide Using the LaB₆ Surface Ionization Ion Source

Element	Mass	Half-life	Cumulative production rate ions/s/uA of protons	Yield from LaB6 source ions/s/uA of protons	TIS efficiency1	Beam into tandem2 (with 5 uA of protons)
Br	83	2.40 h	9.04E+07	6.4E+06	7.1	3.2E+07
	84g	31.8 m	1.12E+08	5.2E+06	4.6	2.6E+07
	85	2.90 m	1.34E+08	3.2E+06	2.4	1.6E+07
	86	55.1 s	1.32E+08	8.5E+05	0.6	4.3E+06
	87	55.6 s	1.11E+08	1.5E+06	1.3	7.5E+06
	88	16.3 s	6.82E+07	2.3E+05	0.3	1.2E+06
I	132m	1.39 h	1.35E+08	8.2E+0	0.61	4.1E+06
	132g	2.3 h	1.35E+08	7.3E+05	0.54	3.7E+06
	134m	3.6 m	3.60E+08	1.5E+06	0.42	7.5E+06
	134g	52.5 m	4.13E+08	2.7E+06	0.65	1.4E+07
	136m	46.9 s	2.20E+08	1.9E+06	0.87	9.5E+06
	136g	1.39 m	2.26E+08	1.2E+06	0.53	6.0E+06
	137	24.5 s	2.25E+08	2.2E+05	0.10	1.1E+06
	138	6.5 s	7.65E+07	2.3E+04	0.03	1.2E+05
1Despite the small efficiencies, this source produces higher beam intensities than the EBPIS and charge exchange combination.
2Beam on target estimated to be 10% of that into the tandem for A<100 and 5% for A>100 assuming single stripping in the tandem. Double stripping reduces the beam intensity by a factor of 10 but should permit a more favorable initial charge state to be used.