NDT Check | Non Destructive Testing

Decay Chart of Ir-192 | Decay Chart of Iridium-192 | Decay calculation for Ir-192 | Decay Calculation for Iridium-192

(toc)

Introduction:

Iridium-192 (symbol 192Ir) is a radioactive isotope of iridium, with a half-life of 73.827 days. It decays by emitting beta (β) particles and gamma (γ) radiation. About 96% of Ir-192 decays occur via emission of β and γ radiation, leading to 192Pt. Some of the β particles are captured by other Ir-192 nuclei, which are then converted to 192Os. Electron capture is responsible for the remaining 4% of Ir-192 decays. Iridium-192 is normally produced by neutron activation of natural-abundance iridium metal. Iridium-192 is a very strong gamma ray emitter, with a gamma dose-constant of approximately 1.54 μSv·h−1·MBq−1 at 30 cm, and a specific activity of 341 TBq·g−1 (9.22 kCi·g−1). There are seven principal energy packets produced during its disintegration process ranging from just over 0.2 to about 0.6 MeV. It is commonly used as a gamma ray source in industrial radiography to locate flaws in metal components. It is also used in radiotherapy as a radiation source, in particular in brachytherapy. Iridium-192 has accounted for the majority of cases tracked by the U.S. Nuclear Regulatory Commission in which radioactive materials have gone missing in quantities large enough to make a dirty bomb.

Ir-192 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 day or months time has elapsed, and TH is the half-life of the radioisotope here Iridium-192 half life is 73.827 Day's, expressed in the same units as time of some day or months.  The ratio A(time)/A(Load) is called the decay factor of the radioisotope for elapsed some day 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.

Day Calculation between two Date:

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

Calculate Difference Between Two Dates (in Days)

Select First Date (mm/dd/yyyy):

Select Second Date (mm/dd/yyyy):

Difference between Two Date is:

Decay Chart of Ir-192 Table | Decay Chart of Iridium-192 Table

Day's	Activity		Day's	Activity		Day's	Activity
0	1.000000		201	0.151514		402	0.022956
1	0.990655		202	0.150098		403	0.022742
2	0.981398		203	0.148695		404	0.022529
3	0.972228		204	0147306		405	0.022319
4	0.963143		205	0.145929		406	0.022110
5	0.954142		206	0.144565		407	0.021904
6	0.945226		207	0.143215		408	0.021699
7	0.936394		208	0.141876		409	0.021496
8	0.927644		209	0.140551		410	0.021295
9	0.918975		210	0.139237		411	0.021096
10	0.910388		211	0.137936		412	0.020899
11	0.901881		212	0.136647		413	0.020704
12	0.893453		213	0.135370		414	0.020510
13	0.885104		214	0.134105		415	0.020319
14	0.876833		215	0.132852		416	0.020129
15	0.868640		216	0.131611		417	0.019941
16	0.860523		217	0.130381		418	0.019754
17	0.852481		218	0.129162		419	0.019570
18	0.844515		219	0.127955		420	0.019387
19	0.836624		220	0.126760		421	0.019206
20	0.828806		221	0.125575		422	0.019026
21	0.821061		222	0.124402		423	0.018849
22	0.813389		223	0.123239		424	0.018672
23	0.805788		224	0.122088		425	0.018498
24	0.798258		225	0.120947		426	0.018325
25	0.790799		226	0.119817		427	0.018154
26	0.783409		227	0.118697		428	0.017984
27	0.776089		228	0.117588		429	0.017816
28	0.768837		229	0.116483		430	0.017650
29	0.761652		230	0.115401		431	0.017485
30	0.754535		231	0.114322		432	0.017321
31	0.747484		232	0.113254		433	0.017160
32	0.740499		233	0.112196		434	0.016999
33	0.733580		234	0.111147		435	0.016840
34	0.726725		235	0.110109		436	0.016683
35	0.719934		236	0.109080		437	0.016527
36	0.713206		237	0.108060		438	0.016373
37	0.706542		238	0.107051		439	0.016220
38	0.699939		239	0.106050		440	0.016068
39	0.693399		240	0.105059		441	0.015918
40	0.686919		241	0.104078		442	0.015769
41	0.680500		242	0.103105		443	0.015622
42	0.674141		243	0.102142		444	0.015476
43	0667842		244	0.101187		445	0.015331
44	0.661601		245	0.100242		446	0.015188
45	0.655419		246	0.099305		447	0.015046
46	0.649294		247	0.098377		448	0.014905
47	0.643227		248	0.097458		449	0.014766
48	0.637216		249	0.096547		450	0.014628
49	0.631262		250	0.095645		451	0.014491
50	0.625363		251	0.094751		452	0.014356
51	0.619519		252	0.093866		453	0.014222
52	0.613730		253	0.092988		454	0.014089
53	0.607995		254	0.092119		455	0.013957
54	0.602314		255	0.091259		456	0.013827
55	0.596685		256	0.090406		457	0.013698
56	0.591110		257	0.089561		458	0.013570
57	0.585586		258	0.088724		459	0.013443
58	0.580114		259	0.087895		460	0.013317
59	0.574693		260	0.087074		461	0.013193
60	0.569323		261	0.086260		462	0.013070
61	0.564003		262	0.085454		463	0.012947
62	0.558732		263	0.084656		464	0.012826
63	0.553511		264	0.083864		465	0.012707
64	0.548339		265	0.083081		466	0.012588
65	0.543215		266	0.082304		467	0.012470
66	0.538139		267	0.081535		468	0.012354
67	0.533110		268	0.080773		469	0.012238
68	0.528129		269	0.080019		470	0.012124
69	0.523194		270	0.079271		471	0.012011
70	0.518305		271	0.078530		472	0.011898
71	0.513461		272	0.077796		473	0.011787
72	0.508663		273	0.077069		474	0.011677
73	0.503910		274	0.076349		475	0.011568
74	0.499201		275	0.075636		476	0.011460
75	0.494536		276	0.074929		477	0.011353
76	0.485337		277	0.074229		478	0.011247
77	0.485337		278	0.073535		479	0.01142
78	0.480802		279	0.072848		480	0.011037
79	0.476309		280	0.072167		481	0.010934
80	0.471858		281	0.071493		482	0.010832
81	0.467449		282	0.070825		483	0.010731
82	0.463081		283	0.070163		484	0.010631
83	0.458754		284	0.069507		485	0.010531
84	0.454467		285	0.068858		486	0.010433
85	0.450220		286	0.068214		487	0.010335
86	0.446013		287	0.067577		488	0.010239
87	0.441845		288	0.066945		489	0.010143
88	0.437716		289	0.066320		490	0.010048
89	0.433626		290	0.065700		491	0.009954
90	0.429574		291	0.065086		492	0.009861
91	0.425560		292	0.064478		493	0.009769
92	0.421583		293	0.063876		494	0.009678
93	0.417644		294	0.063279		495	0.009588
94	0.413741		295	0.062687		496	0.009498
95	0.409875		296	0.062102		497	0.009409
96	0.406045		297	0.061521		498	0.009321
97	0.402250		298	0.060946		499	0.009234
98	0.398492		299	0.060377		500	0.009148
99	0.394768		300	0.059813		501	0.009062
100	0.391079		301	0.059254		502	0.008978
101	0.387424		302	0.058700		503	0.008894
102	0.383804		303	0.058152		504	0.008811
103	0.380218		304	0.057608		505	0.008728
104	0.376665		305	0.057070		506	0.008647
105	0.373145		306	0.056537		507	0.008566
106	0.369658		307	0.056008		508	0.008486
107	0.366204		308	0.055485		509	0.008407
108	0.362782		309	0.054966		510	0.008328
109	0.359392		310	0.054453		511	0.008250
110	0.356033		311	0.053944		512	0.008173
111	0.352706		312	0.053440		513	0.008097
112	0.349411		313	0.052940		514	0.008021
113	0.346146		314	0.052446		515	0.007946
114	0.342911		315	0.051956		516	0.007872
115	0.339707		316	0.051470		517	0.007798
116	0.336532		317	0.050989		518	0.007726
117	0.333387		318	0.050513		519	0.007653
118	0.330272		319	0.050041		520	0.007582
119	0.327186		320	0.049573		521	0.007511
120	0.324129		321	0.049110		522	0.007441
121	0.321100		322	0.048651		523	0.007371
122	0.318099		323	0.048196		524	0.007302
123	0.315127		324	0.047746		525	0.007234
124	0.312182		325	0.047300		526	0.007167
125	0.309265		326	0.046858		527	0.007100
126	0.306375		327	0.046420		528	0.007033
127	0.303512		328	0.045986		529	0.006968
128	0.300676		329	0.045556		530	0.006902
129	0.297866		330	0.045131		531	0.006838
130	0.295083		331	0.044709		532	0.006774
131	0.292325		332	0.044291		533	0.006711
132	0.289594		333	0.043877		534	0.006648
133	0.286887		334	0.043467		535	0.006586
134	0.284207		335	0.043061		536	0.006524
135	0.281551		336	0.042659		537	0.006463
136	0.278920		337	0.042260		538	0.006403
137	0.276314		338	0.041865		539	0.006343
138	0.273732		339	0.041474		540	0.006284
139	0.271174		340	0.041086		541	0.006225
140	0.268640		341	0.040703		542	0.006167
141	0.266129		342	0.040322		543	0.006109
142	0.263642		343	0.039945		544	0.006052
143	0.261179		344	0.039572		545	0.005996
144	0.258738		345	0.039202		546	0.005940
145	0.256320		346	0.038836		547	0.005884
146	0.253925		347	0.038473		548	0.005829
147	0.251552		348	0.038114		549	0.005775
148	0.249202		349	0.037757		550	0.005721
149	0.246873		350	0.037405		551	0.005667
150	0.244566		351	0.037055		552	0.005614
151	0.242281		352	0.036709		553	0.005562
152	0.240017		353	0.036366		554	0.005510
153	0.237774		354	0.036026		555	0.005458
154	0.235552		355	0.035689		556	0.005407
155	0.233351		356	0.035356		557	0.005357
156	0.231170		357	0.035025		558	0.005307
157	0.229010		358	0.034698		559	0.005257
158	0.226870		359	0.034374		560	0.005208
159	0.224750		360	0.034053		561	0.005159
160	0.222650		361	0.033735		562	0.005111
161	0.220570		362	0.033419		563	0.005063
162	0.218508		363	0.033107		564	0.005016
163	0.216467		364	0.032798		565	0.004969
164	0.214444		365	0.032491		566	0.004923
165	0.212440		366	0.032188		567	0.004877
166	0.210455		367	0.031887		568	0.004831
167	0.208488		368	0.031589		569	0.004786
168	0.206540		369	0.031294		570	0.004741
169	0.204610		370	0.031001		571	0.004697
170	0.202698		371	0.030711		572	0.004653
171	0.200804		372	0.030424		573	0.004610
172	0.198927		373	0.030140		574	0.004567
173	0.197069		374	0.029859		575	0.004524
174	0.195227		375	0.029580		576	0.004482
175	0.193403		376	0.029303		577	0.004440
176	0.191595		377	0.029029		578	0.004398
177	0.189805		378	0.028758		579	0.004357
178	0.188031		379	0.028489		580	0.004317
179	0.186274		380	0.028223		581	0.004276
180	0.184534		381	0.027959		582	0.004236
181	0.182809		382	0.027698		583	0.004197
182	0.181101		383	0.027439		584	0.004157
183	0.179409		384	0.027183		585	0.004119
184	0.177732		385	0.026929		586	0.004080
185	0.176072		386	0.026677		587	0.004042
186	0.174426		387	0.026428		588	0.004004
187	0.172796		388	0.026181		589	0.003967
188	0.171182		389	0.025936		590	0.003930
189	0.169582		390	0.025694		591	0.003893
190	0.167997		391	0025454		592	0.003857
191	0.166427		392	0.025216		593	0.003821
192	0.164872		393	0.024980		594	0.003785
193	0.163332		394	0.024747		595	0.003749
194	0.161805		395	0.024516		596	0.003714
195	0.160293		396	0.024287		597	0.003680
196	0.158795		397	0.024060		598	0.003645
197	0.157312		398	0.023835		599	0.003611
198	0.155842		399	0.023612		600	0.003578
199	0.154385		400	0.023391		601	0.003544
200	0.152943		401	0.023173		602	0.003511