Selenium (Se-75) – sealed source – Narodowe Centrum Badań Jądrowych Ośrodek Radioizotopów

Description

Main application:

Gamma radiography

Half-life:

120 days

Recommended working life:

2 years

Radiation energies Eγ[MeV]:

0.066 (1.1%)	0.097 (3.5%)	0.121 (17.3%)	0.136 (59.0%)	0.199 (1.5%)
0.265 (59.1%)	0.280 (25.2%)	0.305 (1.4%)	0.401 (11.6%)	and others

Radioactive decay:

Days from the date of measurement	0	10	20	30	40

0	1.000	0.944	0.891	0.841	0.793
50	0.749	0.707	0.667	0.629	0.594
100	0.561	0.529	0.499	0.471	0.445
150	0.420	0.396	0.374	0.353	0.333
200	0.314	0.297	0.280	0.264	0.249
250	0.235	0.222	0.210	0.198	0.187
300	0.176	0.166	0.157	0.148	0.140
350	0.132	0.125	0.118	0.111	0.105

Description:

double encapsulation containing the isotope as compressed metal powder of selenium or VSe compound. Inner capsule made of titanium or vanadium alloy sealed by laser welding. Outer capsule made of corrosion resistant steel sealed by argon arc welding

Capsules:

GS75M11, GS75M12, SR17, SR18

Identification:

by serial number

Special form radioactive material certificate No: RUS/6223/S-96

Code

Active part

d [mm] x l [mm]

Maximum activity

GS75M11, GS75M12,

SR17, SR18

3 × 3

(2.5 × 2.5)

3700 GBq

100 Ci

Capsule dimensions special form certification and safety performance testing:

Code	*Capsule type ()**	External dimensions Φ [mm] x h [mm]	ISO classification
GS75M11	M11	6 × 12	C 63545
GS75M12	M12	6 × 20	C 63545
SR17	SR17	6.7 × 27	C 63545
SR18	SR18	7.15 × 23.5	C 63545

* Capsule material:

inner: titanium or vanadium
outer: corrosion resistant steel

-SEALED SOURCES

Selenium (Se-75) – sealed source

Description