IRON-55

Nuclear-physical characteristics

Decay mode	Electron capture (100%)
Half-life	2,744 years
Basic energy of gamma and X-rays, keV (quantum yield, %)	KX 5,95 (27,25)
Production
Production process:	radiation treatment of an enriched nickel-58 target by a cyclotron
Nuclear reactions:	⁵⁸Ni (p, α)⁵⁵Co ^β^+,^E^C→ ⁵⁵Fe
Reprocessing:	target dissolution, ion-exchange emission
Product characteristics
Chemical form	Fe(III) chloride in 0,5 M HCl
Specific activity	≥ 50 mBq/mg
Radionuclide purity	min. 99,8 %
Volumetric activity	≥ 10 mBq/ml
Minimum single-unit package	10 mBq
Maximum single-unit package	1500 mBq

Scope of application
Production of standards and calibration sources for radiometric equipment, production of sources for X-ray radiometric analysis, utilization in radioisotope heat sources.

DECAY CHART

Days	Days
		0	10	20	30	40	50	60	70	80	90
	0	1,0000	0,9931	0,9863	0,9795	0,9727	0,9660	0,9593	0,9527	0,9462	0,9396
	100	0,9331	0,9267	0,9203	0,9140	0,9077	0,9014	0,8952	0,8890	0,8829	0,8768
	200	0,8708	0,8648	0,8588	0,8529	0,8470	0,8412	0,8354	0,8296	0,8239	0,8182
	300	0,8126	0,8069	0,8014	0,7959	0,7904	0,7849	0,7795	0,7741	0,7688	0,7635
	400	0,7582	0,7530	0,7478	0,7427	0,7375	0,7324	0,7274	0,7224	0,7174	0,7125
	500	0,7075	0,7027	0,6978	0,6930	0,6882	0,6835	0,6788	0,6741	0,6694	0,6648
	600	0,6602	0,6557	0,6512	0,6467	0,6422	0,6378	0,6334	0,6290	0,6247	0,6204
	700	0,6161	0,6119	0,6076	0,6034	0,5993	0,5952	0,5910	0,5870	0,5829	0,5789
	800	0,5749	0,5709	0,5670	0,5631	0,5592	0,5554	0,5515	0,5477	0,5440	0,5402
	900	0,5365	0,5328	0,5291	0,5255	0,5218	0,5182	0,5147	0,5111	0,5076	0,5041
	1000	0,5006	0,4972	0,4937	0,4903	0,4869	0,4836	0,4803	0,4769	0,4737	0,4704
	1100	0,4671	0,4639	0,4607	0,4575	0,4544	0,4513	0,4481	0,4451	0,4420	0,4389
	1200	0,4359	0,4329	0,4299	0,4270	0,4240	0,4211	0,4182	0,4153	0,4124	0,4096
	1300	0,4068	0,4040	0,4012	0,3984	0,3957	0,3929	0,3902	0,3875	0,3849	0,3822
	1400	0,3796	0,3770	0,3744	0,3718	0,3692	0,3667	0,3641	0,3616	0,3591	0,3567
	1500	0,3542	0,3518	0,3493	0,3469	0,3445	0,3422	0,3398	0,3375	0,3351	0,3328
	1600	0,3305	0,3282	0,3260	0,3237	0,3215	0,3193	0,3171	0,3149	0,3127	0,3106
	1700	0,3084	0,3063	0,3042	0,3021	0,3000	0,2979	0,2959	0,2938	0,2918	0,2898
	1800	0,2878	0,2858	0,2839	0,2819	0,2800	0,2780	0,2761	0,2742	0,2723	0,2704
	1900	0,2686	0,2667	0,2649	0,2631	0,2612	0,2594	0,2576	0,2559	0,2541	0,2524