Sigma projetor Model 880 Elite authorized contents, Model 880 Omega authorized contents, 2.400

TECHNICAL SPECIFICATIONS

Model 880 Elite authorized contents

Isotope	Assembly	Gamma	Half Life	Approximate	Device/Source
	Model Number	Energy Range		Steel Working	Maximum
				Thickness	Capacity
Ytterbium-169	91810	8-308 keV	32 days	2-20 mm	20 Ci	0.74 TBq
Selenium-75	A424-25W	66-401 keV	120 days	3-29 mm	150 Ci	5.55 TBq
Iridium-192	A424-9	206-612 keV	74 days	12-63 mm	50 Ci	4.81 TBq
Cobalt-60	A424-19	1.17-1.33 MeV	5.27 years	50-150 mm	25 mCi	925 MBq
Cesium-137	A424-30	663 keV	30 years	12-63 mm	380 mCi 14.0 GBq

Model 880 Omega authorized contents

Isotope	Assembly	Gamma	Half Life	Approximate	Device/Source
	Model Number	Energy Range		Steel Working	Maximum
				Thickness	Capacity
Ytterbium-169	91810	8-308 keV	32 days	2-20 mm	30 Ci	1.11 TBq
Selenium-75	A424-25W	66-401 keV	120 days	3-29 mm	80 Ci	2.96 TBq
Iridium-192	A424-9	206-612 keV	74 days	12-63 mm	15 Ci	0.55 TBq

Source output

Isotope	At 1 m per Ci (37 GBq)		At 1 ft per Ci (37 GBq)
Ytterbium-169	0.125 R/hr	1.25 mSv/hr	1.3 R/hr	13.0 mSv/hr
Selenium-75	0.203 R/hr	2.03 mSv/hr	2.2 R/hr	22.0 mSv/hr
Iridium-192	0.48 R/hr	4.80 mSv/hr	5.2 R/hr	52.0 mSv/hr
Cobalt-60	1.30 R/hr	13.0 mSv/hr	14.0 R/hr	140 mSv/hr
Cesium-137	0.32 R/hr	3.20 mSv/hr	3.4 R/hr	34.0 mSv/hr

Selected attenuation data

Material	Approximate				Approximate Half Value Thickness
	Material					Inches (mm)
	Density	Ytterbium-169		Selenium-75		Iridium-192		Cobalt-60		Cesium-137
	(g/cm3)							2.400	(61.0)
Concrete	2.35	1.140	(29.0)	1.180	(30.0)	1.700	(43.2)			3.00 (76.2)
Aluminum	2.65		-	1.100	(27.0)		-		-		-
Steel	7.80	0.170	(4.3)	0.315	(8.0)	0.512	(13.0)	0.827	(21.0)	0.900	(22.9)
Lead	11.34	0.032	(0.8)	0.039	(1.0)	0.200	(5.1)	0.500	(12.7)	0.250	(6.4)
Tungsten	17.80		-	0.032	(0.8)	0.130	(3.3)	0.310	(7.9)	0.225	(5.7)
DU	18.70		-		-	0.050	(1.3)	0.270	(6.8)	0.125	(3.2)

Operating Distance

The distance between the remote control and the exposure head is determined by summing the length of the remote control conduits plus the total length of source guide tubes used, and normally should not exceed 47 ft (14.2 m) with standard 25 ft. controls.

Standard remote controls:

25 ft (7.6 m), 35 ft (10.7 m), 50 ft (15 m)

Standard source guide tubes (projection sheaths):

7 ft (2.1 m) set of three source guide tubes: 21 ft total (6.3 m)

1.3