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Isotope

Our product range includes a wide range of bismuth isotopes, cesium isotopes, terbium (tb), lutetium isotopes, ytterbium isotopes and thulium isotopes.
Bismuth Isotopes

Bismuth Isotopes

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Grade StandardIndustrial Grade
CategoryGas Mixtures
Purity (%)99.99%
Principal TypeAtmospheric Gases
BrandDIG
Nominal massAccurate
mass
% Natural abundanceChemical formEnrichment available %
209Bi208.980374 (5)100N/A100

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Cesium Isotopes

Cesium Isotopes

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Grade StandardIndustrial Grade
CategoryLiquefied Gases
Purity (%)99.99%
Principal TypeAtmospheric Gases
Brand DIG
Nominal massAccurate
Mass
% Natural abundanceChemical formEnrichment available %
133Cs133.905429 (7)100N/A100

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Terbium (Tb)

Terbium (Tb)

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Grade StandardTechnical Grade
Enrichment available100%
Physical StateGases
UsageIndustrial
Terbium Isotopes Tb, also known as Terbium, is used in a variety of applications. Terbium is used extensively in organic chemistry in order to study chemical reactions. 

Nominal massAccurate
mass
% Natural abundanceChemical formEnrichment available %
159Tb158.925342 (4)100N/A100

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Lutetium Isotopes

Lutetium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
175 Lu174.940770 (3)97.41 (2)oxide98 - 99+
176 Lu175.942679 (3)2.59 (2)oxide52 - 88+

Both Lutetium Isotopes are generally considered to be stable, although strictly speaking Lu-176 is not entirely stable with a half-life of 3.78 x 1010 years. Lu-175 can be used as a yield tracer in the ICP-MS based determination of Pu in urine. Lu-176 is used for the production of radioactive Lu-177 which is a very promising radio-immunotherapy isotope for the treatment of small, soft tumors.

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Ytterbium Isotopes

Ytterbium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical 
form
Enrichment available %
168 Yb  oxide22 - 42+
170 Yb  oxide72 - 83+
171 Yb170.936323 (3)14.3 (57)oxide91 - 95+
172 Yb171.936378 (3)21.83 (67)oxide95 - 97+
173 Yb172.938208 (3)16.13 (27)oxide, metal85 - 92+
174 Yb173.938859 (3)31.8 (92)oxide86 - 99+
176 Yb175.942564 (4)12.7 (41)oxide96 - 99+

Ytterbium has seven stable isotopes and two of them are used for medical and industrial purposes. Yb-168 is used for the production of Yb-169 and this radioisotope is used as a radiation source in gamma cameras. Yb-169 is also used in the medical field where it has been proposed as an alternative for I-125 and Pd-103 in the treatment of prostate cancer while it is also used for diagnostics in the gastrointestinal tract. Yb-176 can be used as a target for the production of carrier-free Lu-177 with a high specific activity. Yb-171 in an excited state has been proposed as an optical frequency standard, while the other Yb isotopes are used in various physics experiments.

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Ytterbium Isotopes

Ytterbium Isotopes

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Nominal massAccurate % Natural abundanceChemical Enrichment available %
massform
168 Yb  oxide22 - 42+
170 Yb  oxide72 - 83+
171 Yb170.936323 (3)14.3 (57)oxide91 - 95+
172 Yb171.936378 (3)21.83 (67)oxide95 - 97+
173 Yb172.938208 (3)16.13 (27)oxide, metal85 - 92+
174 Yb173.938859 (3)31.8 (92)oxide86 - 99+
176 Yb175.942564 (4)12.7 (41)oxide96 - 99+

Ytterbium has seven stable isotopes and two of them are used for medical and industrial purposes. Yb-168 is used for the production of Yb-169 and this radioisotope is used as a radiation source in gamma cameras. Yb-169 is also used in the medical field where it has been proposed as an alternative for I-125 and Pd-103 in the treatment of prostate cancer while it is also used for diagnostics in the gastrointestinal tract. Yb-176 can be used as a target for the production of carrier-free Lu-177 with a high specific activity. Yb-171 in an excited state has been proposed as an optical frequency standard, while the other Yb isotopes are used in various physics experiments.

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Thulium Isotopes

Thulium Isotopes

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Nominal massAccurate % Natural abundanceChemical formEnrichment available %
mass
169Tm168.934212 (4)100N/A100

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Erbium Isotopes

Erbium Isotopes

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Nominal Accurate % Natural Chemical Enrichment 
massmassabundanceformavailable %
162 Er161.928775 (4)0.14 (1)oxide22 - 39+
164 Er163.929198 (4)1.61 (3)oxide62 - 82+
166 Er165.930290 (4)33.6 (35)oxide96 - 98+
167 Er166.932046 (4)22.95 (17)oxide94 - 96+
168 Er167.932368 (4)26.8 (26)oxide98+
170 Er169.935461(4)14.9 (27)oxide97 - 98+

Erbium has six stable isotopes but only Er-168 appears to have a well established application. Er-168 is used for the production of Er-169 which is used in form of citrate for the treatment of rheumatoid arthritis.

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Holmium Isotopes

Holmium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
165Ho164.930319 (4)100N/A100

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Gadolinium Isotopes

Gadolinium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical 
form
Enrichment available %
152 Gd151.919786 (4)0.20 (1)oxide30 - 34+
154 Gd153.920861 (4)2.18 (3)oxide64 - 67+
155 Gd154.922618 (4)14.80 (12)oxide, chloride90 - 94+
156 Gd155.922118 (4)20.47 (9)oxide93 - 95+
157 Gd156.923956 (4)15.65 (2)oxide, chloride87 - 99+
158 Gd157.924019 (4)24.84 (7)oxide, metal97+
160 Gd159.927049 (4)21.86 (19)oxide, metal97 - 98+

Gadolinium Isotopes have the highest cross section for the capture of thermal neutrons of any element and this is mainly due to the high cross section of Gd-157 (255,000 barn) and Gd-155 (61,000 barn). Natural Gadolinium is currently used as a burnable poison in nuclear fuel, but the use of Gd-155/157 only has been proposed as this would create an even more effective burnable poison. Gd-152 is used for the production of radioactive Gd-153 which is used for osteoporosis research and bone density measurements. Gd-160 is used in double beta decay research.

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Europium Isotopes

Europium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
151 Eu150.919702 (8)47.8 (3)oxide97 - 99+
153 Eu152.921225 (4)52.2 (3)oxide99+

Both Europium Isotopes are stable and used for the production of radioisotopes. Eu-151 is used for the production of Eu-152 which is used as a reference source in gamma spectroscopy. Eu-153 can be used for the production of high specific activity Sm-153 via fast neutron irradiation.

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Europium Isotopes

Europium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
151 Eu150.919702 (8)47.8 (3)oxide97 - 99+
153 Eu152.921225 (4)52.2 (3)oxide99+

Both Europium Isotopes are stable and used for the production of radioisotopes. Eu-151 is used for the production of Eu-152 which is used as a reference source in gamma spectroscopy. Eu-153 can be used for the production of high specific activity Sm-153 via fast neutron irradiation.

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Thallium Isotopes

Thallium Isotopes

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Stable Lanthanum Isotopes - La Isotopes
Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
138La137.907105 (6)0.09 (1)Oxide6 - 11+
139La138.906347 (5)99.91 (1)Oxide99+

Thallium Isotopes
Stable Lanthanum Isotopes - La Isotopes
Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
138La137.907105 (6)0.09 (1)Oxide6 - 11+
139La138.906347 (5)99.91 (1)Oxide99+
 
Both Lanthanum Isotopes do not appear to have many applications. Only La-139 is used for the production of the medical radioisotope Ce-139.

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Praseodymium Isotopes

Praseodymium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
141Pr140.907647 (4)100N/A100

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Neodymium Isotopes

Neodymium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical 
form
Enrichment available %
142 Nd141.907719 (4)27.2 (5)oxide95 - 99+
143 Nd142.909810 (4)12.18 (2)oxide55 - 96+
144 Nd143.910083 (4)23.80 (3)oxide, chloride85 - 98+
145 Nd144.912570 (4)8.30 (1)oxide84 - 94+
146 Nd145.913113 (4)17.19 (3)oxide97 - 98+
148 Nd147.916889 (4)5.76 (1)oxide74 - 97+
150 Nd149.920887 (4)5.64 (2)oxide89 - 97+

Neodymium Isotopes are used in a variety of scientific applications. Nd-142 has been used for the production of short-lived Tm and Yb isotopes. Nd-146 has been suggested for the production of Pm-147 which can be used as a source for radioisotopic power generation. Several Nd isotopes have been used for the production of other Pm isotopes. Finally, Nd-150 has been used to study double beta decay.

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Lead Isotopes

Lead Isotopes

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Nominal massAccurate
mass
% Natural abundanceChemical 
form
Enrichment available %
204 Pb203.973020 (5)1.4 (1)metal, oxide66 - 99+
206 Pb205.974440 (4)24.1 (1)metal94
207 Pb206.975872 (4)22.1 (1)metal, oxide83 - 92+
208 Pb207.976627 (4)52.4 (1)metal, nitride, sulphate62 - 99+

Lead Isotopes are used for medical and scientific purposes. Pb-206 and Pb-207 can both be used to produce the medical radioisotopes Bi-205 and Bi-206. Pb-204, Pb-206 and Pb-207 are used to measure lead levels in blood. Pb-208 has been used to produce neutron-rich isotopes of W and Lu. Pb-208 has also been used to study the configuration of neutron stars. Several Lead Isotopes have also been used as target in the production of super heavy elements.

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Thallium Isotopes

Thallium Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
203 Tl202.972320 (5)29.524 (14)metal, oxide, Nitrtite82 - 99
205 Tl204.974401(5)70.476 (14)metal, oxide89 - 99

Thallium has two stable isotopes and one of these, Tl-203, is used to produce one of the “workhorses” of nuclear medicine: Tl-201. Tl-201 is used extensively for imaging and in particular for perfusion tests of the myocardium. These tests are done to determine the damage to the heart from a heart attack or from heart diseases. Tl-205 has been proposed as an alternative target for the production of Tl-201. Tl-205 is also used in nuclear magnetic resonance research.

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Tungsten Isotopes

Tungsten Isotopes

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Nominal massAccurate % Natural abundanceChemical formEnrichment available %
mass
180W179.946701 (5)0.12 (1)oxide, metal5 - 95+
182W181.948202 (3)26.50 (16)oxide, metal81 - 99+
183W182.950220 (3)14.31 (4)metal96+
184 W183.950928 (3)30.64 (2)oxide, metal, fluoride85 - 96+
186 W185.954357 (4)28.43 (19)oxide, metal, fluoride95 - 99+

Tungsten Isotopes are used in several applications. W-180 is used for the production of the therapeutic radioisotope W-181. W-186 is used for the production of W-188 which is used in so-called Tungsten-Rhenium generators. The W-188 daughter Re-188 is “milked” from there generators and used as a therapeutic radioisotope. W-184 has been used to study the elastic and inelastic scattering of heavy ions.

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Hafnium Isotopes

Hafnium Isotopes

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Nominal Accurate % Natural Chemical Enrichment 
massmassabundanceformavailable %
174 Hf173.940044 (4)0.16 (1)oxide12 - 21+
176 Hf175.941406 (4)5.26 (7)oxide65 - 84+
177 Hf176.943217 (3)18.60 (9)oxide85 - 94+
178 Hf177.943696 (3)27.297 (7)oxide92 - 96+
179 Hf178.9458122 (30)13.629 (5)oxide73 - 90+
180 Hf179.9465457 (30)35.08 (16)oxide, mental94 - 99+

Hafnium Isotopes have several applications. Hf-180 is used for the production of the radioisotope Hf-181 while Hf-180 is used for the production of the radioisotope Ta-179, which has a medical application. The second isomer of Hf-178 (Hf-178m2) exhibits very high excitation energy and it has been suggested for use in gamma ray lasers.

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Xenon Isotopes

Xenon Isotopes

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Nominal Accurate % Natural Chemical Enrichment 
massmassabundanceformavailable %
124 Xe123.9058942 (22)0.09 (1)gas99+
126 Xe125.904281 (8)0.09 (1)gas99+
129 Xe128.9047801 (21)26.44 (24)gas80 - 99+
132 Xe131.904144 (5)26.9 (6)gas99+
136 Xe135.907214 (8)8.9 (16)gas80+

Of the nine stable Xenon Isotopes, several are used in various medical and scientific applications. Xe-124 is used in the production of two radioisotopes: I-123 and I-125. I-123 is used extensively in diagnostic procedures while I-125 is used in the treatment of prostate cancer. Hyperpolarized Xe-129 is used in the magnetic resonance imaging of gas flows in the lungs. Xe-136 has been proposed as a detector for neutrinoless double Beta decay research. Xe-126 can be used as a target for the production of radioactive Ba-128.

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Rubidium Isotopes

Rubidium Isotopes

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Nominal massAccurate 
mass

% Natural abundanceChemical 
form
Enrichment available %
85 Rb84.911794 (3)72.165 (13)chloride, carbonate, iodide, sulphate95 - 99+
87 Rb86.909187 (3)27.835 (13)chloride, metal, iodide, carbonate, chromate82 - 99+

Both Rubidium Isotopes have medical and industrial applications. Rb-87 is used as a frequency standard in high-precision timing equipment such as GPS receivers. It also used in the production of Bose-Einstein condensates and in laser cooling. Rb-85 is used for the production of the radioisotope Rb-86 which is used as a tracer. Rb-85 can also be used for the production of Sr-82, which is used in Sr-82/Rb-82 generators, though Sr-82 is generally produced with natural Rubidium.

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Iodine Isotopes

Iodine Isotopes

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Nominal massAccurate 
mass
% Natural abundanceChemical formEnrichment available %
127I126.904473 (5)100N/A100

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