NDT Check | Non Destructive Testing

Decay Chart of Co-60 | Decay Chart of Cobalt-60 | Decay calculation for Co-60 | Decay Calculation for Cobalt-60

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Introduction:

Cobalt-60 (60Co) is a synthetic radioactive isotope of cobalt with a half-life of 5.26 years.  It is produced artificially in nuclear reactors. Deliberate industrial production depends on neutron activation of bulk samples of the monoisotopic and mononuclidic cobalt isotope Co-59 Measurable quantities are also produced as a by-product of typical nuclear power plant operation and may be detected externally when leaks occur. In the latter case (in the absence of added cobalt) the incidentally produced Co-60 is largely the result of multiple stages of neutron activation of iron isotopes in the reactor's steel structures via the creation of its Co-59 precursor. The simplest case of the latter would result from the activation of Fe-58 & Co-60 undergoes beta decay to the stable isotope nickel-60 (Ni-60). The activated cobalt nucleus emits two gamma rays with energies of 1.17 and 1.33 MeV.

C0-60 Decay Formula:

A(time) = A(Load) exp (-0.69315 time/TH)

The decrease of activity of a radioisotope with time is given by the equation Where A(Load) is the initial activity at source is Loading, A(time) is the activity after a further some Year's or months time has elapsed, and TH is the half-life of the radioisotope here Cobalt-60 half life is 5.26 Year's, expressed in the same units as time of some Year's or months.  The ratio A(time)/A(Load) is called the decay factor of the radioisotope for elapsed some Year's or months "time'.  Decay factors for various radioisotopes and for various elapsed times are tabulated below. To determine the final activity of an isotope, multiply the current activity by the decay factor in the correct table.

Month Calculation between two Date:

Months calculation is important for decay chart, Month calculation between two date one is Activity Loading Date and second Date is source use or find source Activity after some Year's or some month's

Calculate Months Between Dates

Start Date: Current Date: Difference between Two Date is:

Decay Chart of Co-60 Table | Decay Chart of Cobalt-60 Table

Month's	Activity		Month's	Activity		Month's	Activity
0	1.000000		201	0.110000		402	0.012100
1	0.989079		202	0.108799		403	0.011968
2	0.978277		203	0.107610		404	0.011837
3	0.967592		204	0.106435		405	0.011708
4	0.957025		205	0.105273		406	0.011580
5	0.946573		206	0.104123		407	0.011454
6	0.936235		207	0.102986		408	0.011328
7	0.926010		208	0.101861		409	0.011205
8	0.915897		209	0.100749		410	0.011082
9	0.905894		210	0.099648		411	0.010961
10	0.896000		211	0.098560		412	0.010842
11	0.886215		212	0.097484		413	0.010723
12	0.876536		213	0.096419		414	0.010606
13	0.866963		214	0.095366		415	0.010490
14	0.857495		215	0.094324		416	0.010376
15	0.848129		216	0.093294		417	0.010262
16	0.838867		217	0.092275		418	0.010150
17	0.829705		218	0.091268		419	0.010039
18	0.820644		219	0.090271		420	0.009930
19	0.811681		220	0.089285		421	0.009821
20	0.802816		221	0.088310		422	0.009714
21	0.794048		222	0.087345		423	0.009608
22	0.785376		223	0.086391		424	0.009503
23	0.776799		224	0.085448		425	0.009399
24	0.768315		225	0.084515		426	0.009297
25	0.759924		226	0.083592		427	0.009195
26	0.751625		227	0.082679		428	0.009095
27	0.743416		228	0.081776		429	0.008995
28	0.735297		229	0.080883		430	0.008897
29	0.727266		230	0.079126		431	0.008800
30	0.719324		231	0.079126		432	0.008704
31	0.711468		232	0.078261		433	0.008609
32	0.696012		233	0.077407		434	0.008515
33	0.688411		234	0.076561		435	0.008422
34	0.688411		235	0.075725		436	0.008330
35	0.680892		236	0.074898		437	0.008239
36	0.673456		237	0.074080		438	0.008149
37	0.666101		238	0.073271		439	0.008060
38	0.658826		239	0.072471		440	0.007972
39	0.651631		240	0.071679		441	0.007885
40	0.644514		241	0.070897		442	0.007799
41	0.637475		242	0.070122		443	0.007713
42	0.630513		243	0.069356		444	0.007629
43	0.623627		244	0.068599		445	0.007546
44	0.616816		245	0.067850		446	0.007463
45	0.610080		246	0.067109		447	0.007382
46	0.603417		247	0.066376		448	0.007301
47	0.596827		248	0.065651		449	0.007222
48	0.590308		249	0.064934		450	0.007143
49	0.583861		250	0.064225		451	0.007065
50	0.577485		251	0.063523		452	0.006988
51	0.571178		252	0.062830		453	0.006911
52	0.564940		253	0.062143		454	0.006836
53	0.558770		254	0.061465		455	0.006761
54	0.552667		255	0.060793		456	0.006687
55	0.546631		256	0.060129		457	0.006614
56	0.540661		257	0.059473		458	0.006542
57	0.534757		258	0.058823		459	0.006471
58	0.528916		259	0.058181		460	0.006400
59	0.523140		260	0.057545		461	0.006330
60	0.517426		261	0.056917		462	0.006261
61	0.511775		262	0.056295		463	0.006192
62	0.506186		263	0.055681		464	0.006125
63	0.500658		264	0.055072		465	0.006058
64	0.495190		265	0.054471		466	0.005992
65	0.489782		266	0.053876		467	0.005926
66	0.484433		267	0.053288		468	0.005862
67	0.479142		268	0.052706		469	0.005798
68	0.468733		269	0.052130		470	0.005734
69	0.468733		270	0.051561		471	0.005672
70	0.463614		271	0.050998		472	0.005610
71	0.458551		272	0.050441		473	0.005548
72	0.453543		273	0.049890		474	0.005488
73	0.448590		274	0.049345		475	0.005428
74	0.443690		275	0.048806		476	0.005369
75	0.438845		276	0.048273		477	0.005310
76	0.434052		277	0.047746		478	0.005252
77	0.429311		278	0.047224		479	0.005195
78	0.424623		279	0.046709		480	0.005138
79	0.419985		280	0.046198		481	0.005082
80	0.415398		281	0.045694		482	0.005026
81	0.410862		282	0.045195		483	0.004971
82	0.406375		283	0.044701		484	0.004917
83	0.401936		284	0.044213		485	0.004863
84	0.397547		285	0.043730		486	0.004810
85	0.393205		286	0.043253		487	0.004758
86	0.388911		287	0.042780		488	0.004706
87	0.384663		288	0.042313		489	0.004654
88	0.380462		289	0.041851		490	0.004604
89	0.376307		290	0.041394		491	0.004553
90	0.372197		291	0.040942		492	0.004504
91	0.368132		292	0.040495		493	0.004454
92	0.364112		293	0.040052		494	0.004406
93	0.360135		294	0.039615		495	0.004358
94	0.356202		295	0.039182		496	0.004310
95	0.352312		296	0.038754		497	0.004263
96	0.348464		297	0.038331		498	0.004216
97	0.344658		298	0.037912		499	0.004170
98	0.340894		299	0.037498		500	0.004125
99	0.337171		300	0.037089		501	0.004080
100	0.333489		301	0.036684		502	0.004035
101	0.329847		302	0.036283		503	0.003991
102	0.326244		303	0.035887		504	0.003948
103	0.322681		304	0.035495		505	0.003904
104	0.319157		305	0.035107		506	0.003862
105	0.315671		306	0.034724		507	0.003820
106	0.312224		307	0.034345		508	0.003778
107	0.308814		308	0.033970		509	0.003737
108	0.305441		309	0.033599		510	0.003696
109	0.302105		310	0.033232		511	0.003655
110	0.298806		311	0.032869		512	0.003616
111	0.295543		312	0.032510		513	0.003576
112	0.292315		313	0.032155		514	0.003537
113	0.289122		314	0.031803		515	0.003498
114	0.285965		315	0.031456		516	0.003460
115	0.282842		316	0.031113		517	0.003422
116	0.279753		317	0.030773		518	0.003385
117	0.276697		318	0.030437		519	0.003348
118	0.273675		319	0.030104		520	0.003311
119	0.270686		320	0.029776		521	0.003275
120	0.267730		321	0.029450		522	0.003240
121	0.264806		322	0.029129		523	0.003204
122	0.261914		323	0.028811		524	0.003169
123	0.259054		324	0.028496		525	0.003135
124	0.256224		325	0.028185		526	0.003100
125	0.253426		326	0.027877		527	0.003066
126	0.250658		327	0.027572		528	0.003033
127	0.247921		328	0.027271		529	0.003000
128	0.245213		329	0.026973		530	0.002967
129	0.242535		330	0.026679		531	0.002935
130	0.239886		331	0.026388		532	0.002903
131	0.237266		332	0.026099		533	0.002871
132	0.234675		333	0.025814		534	0.002840
133	0.232112		334	0.025532		535	0.002809
134	0.229577		335	0.025254		536	0.002778
135	0.227070		336	0.024978		537	0.002748
136	0.224590		337	0.024705		538	0.002718
137	0.222137		338	0.024435		539	0.002688
138	0.219711		339	0.024168		540	0.002659
139	0.217311		340	0.023904		541	0.002629
140	0.214938		341	0.023643		542	0.002601
141	0.212591		342	0.023385		543	0.002572
142	0.210269		343	0.023130		544	0.002544
143	0.207973		344	0.022877		545	0.002516
144	0.205701		345	0.022627		546	0.002489
145	0.203455		346	0.022380		547	0.002462
146	0.201233		347	0.022136		548	0.002435
147	0.199035		348	0.021894		549	0.002408
148	0.196861		349	0.021655		550	0.002382
149	0.194711		350	0.021418		551	0.002356
150	0.192585		351	0.021184		552	0.002330
151	0.190481		352	0.020953		553	0.002305
152	0.188401		353	0.020724		554	0.002280
153	0.186343		354	0.020498		555	0.002255
154	0.184308		355	0.020274		556	0.002230
155	0.182295		356	0.020053		557	0.002206
156	0.180304		357	0.019834		558	0.002182
157	0.178335		358	0.019617		559	0.002158
158	0.176388		359	0.019403		560	0.002134
159	0.174461		360	0.019191		561	0.002111
160	0.172556		361	0.018981		562	0.002088
161	0.170671		362	0.018774		563	0.002065
162	0.168807		363	0.018569		564	0.002043
163	0.166964		364	0.018366		565	0.002020
164	0.165140		365	0.018165		566	0.001998
165	0.163337		366	0.017967		567	0.001976
166	0.161553		367	0.017771		568	0.001955
167	0.159788		368	0.017577		569	0.001933
168	0.158043		369	0.017385		570	0.001912
169	0.156317		370	0.017195		571	0.001891
170	0.154610		371	0.017007		572	0.001871
171	0.152922		372	0.016821		573	0.001850
172	0.151251		373	0.016638		574	0.001830
173	0.149600		374	0.016456		575	0.001810
174	0.147966		375	0.016276		576	0.001790
175	0.146350		376	0.016098		577	0.001771
176	0.144751		377	0.015923		578	0.001751
177	0.143170		378	0.015749		579	0.001713
178	0.141607		379	0.015577		580	0.001713
179	0.140060		380	0.015407		581	0.001695
180	0.138531		381	0.015238		582	0.001676
181	0.137018		382	0.015072		583	0.001658
182	0.135521		383	0.014907		584	0.001640
183	0.134041		384	0.014745		585	0.001622
184	0.132577		385	0.014584		586	0.001604
185	0.131129		386	0.014424		587	0.001587
186	0.129697		387	0.014267		588	0.001569
187	0.129697		388	0.014111		589	0.001552
188	0.126880		389	0.013957		590	0.001535
189	0.125494		390	0.013804		591	0.001518
190	0.124124		391	0.013654		592	0.001502
191	0.122768		392	0.013504		593	0.001485
192	0.121427		393	0.013357		594	0.001469
193	0.120101		394	0.013211		595	0.001453
194	0.118789		395	0.013067		596	0.001437
195	0.117492		396	0.012924		597	0.001422
196	0.116209		397	0.012783		598	0.001406
197	0.114940		398	0.012643		599	0.001391
198	0.113684		399	0.012505		600	0.001376
199	0.112443		400	0.012369		601	0.001361
200	0.111215		401	0.012234		602	0.001346