holmium 166 isotope symbol

Mass numbers of typical isotopes of Holmium are 165. In addition, Holmium-166 emits primary gamma photons (81 KeV, 6.7%). The following year, Clive of Sweden separated holmium from erbium earth by chemical method. Praseodymium (Pr). Holmium is found as a minor component of the minerals monazite and bastnaesite. It is a soft, malleable, lustrous, silvery-white metal, which is named after Ytterby, … The periodic table is a chart that shows how chemical elements are related to each other. When combined with yttrium, it forms highly magneticcompounds. Natural holmium contains one stable isotope, holmium-165. All other radioisotopes have half-lives not greater than 1.117 days in their ground states … Furthermore, holmium-165 can be visualized by MRI because of its paramagnetic. Nomenclature Symbols Symbol Description Units specificactivity Bq⋅g Å1(1Ci=37⋅10 ÃBq) t1/2 half-life s Density g⋅cm Å ½ microscopiccross-section b(1b=10 Å ¼ ¾cm ¼) Σ macroscopiccross-section cm Å » ] atomicnumberdensity cm Å ½ neutronspeed cm⋅s Å » reaction-ratedensity cm Å ½⋅s Å » neutronflux cm Å ¼⋅s Å » Some synthetic radioactive isotopes are known, the most stable one is holmium 163, with a half life of 4570 years. Erbium naturally contain six stable isotopes: 162 Er, 164 Er, 166 Er, 167 Er, 168 Er and 170 Er. Holmium is a rare earth element that has the symbol Ho and atomic number 67. Biological role. Geochemistry of Holmium; Goldschmidt classification: Lithophile: Ho 3+ was one of the ions least depleted from the mantle in the formation of the crust. Related subjects: Chemical elements. The isotope holmium-166 is attractive as it emits high-energy beta radiation which can be used for a therapeutic effect and gamma radiation which can be used for nuclear imaging purposes. Analytical, Diagnostic and Therapeutic Techniques and Equipment 10. Holmium : Symbol: Ho : Atomic number: 67 : Atomic weight: 164.93 : Standard state: Solid at 298 ºK : CAS Registry ID: 7440-60-0 : Group in periodic table: N/A : Group name: Lanthanoid : Period in periodic table: 6 (Lanthanoid) Block in periodic table: f-block : Color: Silvery white : Classification: Metallic : Melting point: 1472 °C: Boiling point: 2695 °C: Vaporization point: 2694 … Z Name Symbol Mass of Atom % Abundance Z Name Symbol Mass of Atom % Abundance 164Dy 163.929171 28.18 67 Holmium 165Ho 164.930319 100 68 PtErbium 162Er 164Er 166Er 167Er 168Er 170Er 198 77 Iridium 191Ir 193Ir 190 192Pt 194Pt 195Pt 196Pt Pt 69 Thulium 169Tm Au 70 Ytterbium 168Yb 170Yb 171Yb 172Yb 173Yb 174Yb 176Yb 71 Lutetium 175Lu 176Lu 205 Holmium forms no commercially important compounds. It is soft and corrosion resistant element. 59 electrons (white) successively occupy available electron shells (rings). Holmium-166 (26 h): Being developed for diagnosis and treatment of liver tumours. Soret in 1878. Characteristics Dysprosium is a rare earth element that has a metallic, bright silver luster, relatively stable in air at room temperature, but dissolving… It is parama… All other radioisotopes have ground-state half-lives not greater than … unknown; valence +5.Situated in Group 5 of the periodic table periodic table, chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Nejstabilnější radioizotopy jsou 163 Ho (poločas přeměny 4570 let), 166 Ho (26,824 hodin), 167 Ho (3,003 h), 161 Ho (2,48 h) a 156 Ho (56 minut). Recent trials have shown the safety and efficacy of holmium microspheres for the treatment of advanced liver cancer. 23 terms. Radiopharmacy Isotope Symbols & Name. A prior knowledge of polyatomic Symbol: Decay Type: Half Life Holmium: 163 163 Ho: Electron capture (e) 4,570 years Holmium: 164 164 Ho: Electron capture (e) 29 minutes Holmium: 166 166 Ho: Beta decay: 26.763 hours Holmium: 166m 166m Ho: Gamma decay: 1200 years Holmium: 167 167 Ho: Beta decay: 3.1 hours A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. YOU MIGHT ALSO LIKE... 23 terms. The primary decay products before Er-166 are element 67 ( holmium ) isotopes, and the primary products after are element 69 ( thulium ) isotopes. 15750-04-6. The below table lists 36 isotopes spanning 140 Ho through 175 Ho as well as 33 nuclear isomers.Among the known synthetic radioactive isotopes; the most stable one is 163 Ho, with a half-life of 4,570 years. Elemental holmium is a relatively soft and malleable silvery-white metal.It is too reactive to be … Holmium is a chemical element with symbol Ho and atomic number 67. Isotopes are nuclides that have the same atomic number and are therefore the same element, but differ in the number of neutrons. Notable characteristics. Elements with atomic numbers 58 through 71 are known as the lanthanides. QuiremSpheres®, the next generation of SIRT microspheres, are the only commercially available microspheres that contain the radioactive isotope holmium-166. Get the facts about element Holmium (Ho) [67] from the periodic table. 59 terms. HolmiumSolution consists of Holmium-166 chloride dissolved in 2 ml sterile water.. Holmium-166 is a high-energy beta emitting isotope. A rare earth metal, it is found in the minerals monazite and gadolinite.. Part of the lanthanide series, holmium is a rare-earth element.. Holmium was discovered through isolation by Swedish chemist Per Theodor Cleve and independently by Jacques-Louis Soret and Marc Delafontaine, who observed it spectroscopically in 1878.Its oxide was first isolated from rare … Přírodní holmium (67 Ho) je tvořeno jediným izotopem, 165 Ho, což jej řadí mezi monoizotopické prvky.Bylo také popsáno 36 radioizotopů, s nukleonovými čísly 140 až 176, a řada jaderných izomerů tohoto prvku. Each entry has a full citation identifying its source. … Use this periodic table for calculating molar mass for any chemical formula. QuiremSpheres®, the next generation of SIRT microspheres, are indicated for the treatment of advanced unresectable liver tumors and are the only commercially available microspheres that contain the radioactive isotope Holmium-166. All other radioisotopes have half-lives not greater than 1.117 days in their ground states (although the … About this schools Wikipedia selection. Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of praseodymium-141 (atomic number: 59), the most common isotope of this element. A chemist named Per Teoder Cleve discovered this element in 1879 and he named it after his birthplace, Stockholm. Holmium, isotope of mass 167. Holmium is a relatively soft and malleable element that is fairly corrosion-resistant and stable in dry air at standard temperature and pressure. 4. 105; mass number of most stable isotope 268; m.p., b.p., and sp. Electronic shell [ Xe ] 4f 11 6s 2. Natural holmium ( 67 Ho) contains one stable isotope, 165 Ho. The below table lists 36 isotopes spanning 140 Ho through 175 Ho as well as 33 nuclear isomers. The radioactive but long-lived 166m1 Ho (see "Isotopes" above) is used in calibration of gamma-ray spectrometers. In March 2017, IBM announced that they had developed a technique to store one bit of data on a single holmium atom set on a bed of magnesium oxide. 75 terms. Holmium. Natural holmium (67Ho) contains one stable isotope, 165Ho. dubnium (do͞ob`nēəm), artificially produced radioactive chemical element; symbol Db; at. Holmium-166 is a betaemitting isotope for therapeutic useThe . Because elements have been discovered at various times and places, from antiquity through the present day, their names have derived from several languages and … Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature. Thulium Find list of stable and radioactive isotopes of Platinum (Pt), half life period of its unstable or radioactive isotope, molecular weight, particle emitted during decay and more a) Chromium-51: Atomic number of chromium-51 is 24 and mass number is 51. Number of neutrons =. The degree of damage is dependent on the … Compare Samarium vs Holmium of the Periodic Table on all their Facts, Electronic Configuration, Chemical, Physical, Atomic properties. Uranium. : Ho 3+ is concentrated in residual soils and sediments (less certainty.) In moist air and at higher temperatures, however, it quickly oxidizes, forming a yellowish oxide. 67 Holmium Ho 165 164.930320 68 Erbium Er 166 165.930292 69 Thulium Tm 169 168.934213 70 Ytterbium Yb 174 173.938861 71 Lutecium Lu 175 174.940772 72 Hafnium Hf 180 179.946547 73 Tantalum Ta 181 180.947993 74 Tungsten W 184 183.950929 75 Rhenium Re 187 186.955746 76 Osmium Os 191 190.960922 192 191.961468 77 Iridium Ir 191 190.960585 193 192.962916 Holmium ( / ˈ h oʊ l m i ə m / HOHL-mee-əm) is a chemical element with the symbol Ho and atomic number 67. The half-life is 26.8 This element belongs to the lanthanide series. Some of holmium's compounds include: holmium oxide (Ho 2 O 3), holmium fluoride (HoF 3) and holmium iodide (HoI 3). (pronEng|dɪsˈproʊziəm) is a chemical element with the symbol Dy and atomic number 66. no. There is a minimum count of 20 isotopes of Holmium that are found to be radioactive. Symbol:Ho. Energy of first ionisation. It is also used for brain and prostate brachytherapy. It has twenty nine radioisotopes, 169 Er has half-life of 9.4 days. ... Holmium-167 15750-04-6 Holmium, isotope of mass 167 167Ho (~167~Ho)Holmium More… Molecular Weight: 166.93314: Dates: Modify 2021-06-19 Create … Holmium is very soft and malleable. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Holmium is a rare earth element and is a relatively soft and malleable silvery-white metal. Ho-166. Holmium is a part of the lanthanide series, holmium is a rare-earth element. So, the number of protons is 24. maximum energy of the beta particles is 1.85 MeV (50.0%) and 1.77MeV (48.7%). Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Facts Date of Discovery: 1886 Discoverer: Paul Emile Lecoq de Boisbaudran Name Origin: From the Greek word dysprositos (hard to get at) Uses: nuclear reactors Obtained From: erbium, holmium Related Links I currently do not know of any links for Dysprosium. High specific activities were achieved ranging from 21.7 to 59.9 MBq/mg ( 166 HoPO 4 -ms) and from 28.8 to 79.9 MBq/mg ( 166 Ho(OH) 3 -ms) depending on … The below table lists 36 isotopes spanning 140Ho through 175Ho as well as 33 nuclear isomers. All other radioisotopes have half-li. The primary decay products before Er-166 are element 67 ( holmium ) isotopes, and the primary products after are element 69 ( thulium ) isotopes. Holmium was discovered by Swedish chemist Per Theodor Cleve. Holmium is a bright silver lustrous metal. Its oxide was first isolated from rare earth ores in 1878. The nucleus consists of 59 protons (red) and 82 neutrons (orange). Among the known synthetic radioactive isotopes; the most stable one is 163Ho, with a half-life of 4,570 years. The primary decay mode before the most abundant stable isotope, Er-166, is electron capture, and the primary mode after is beta decay. Holmium-166. Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare-earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve. Its oxide was first isolated from rare-earth ores in 1878. Note that isotopic atomic species of a given element is uniquely identified by the mass number A, also called atomic mass number, which is the number of nucleons (protons and neutrons) in an atomic nucleus.The full isotope symbol would also have the atomic number Z as a subscript to the left of the element symbol directly below the mass … The poly-l-lactic acid constitutes a matrix which contains holmium-165. Isotopes of holmium. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden, from which it got its name.. Erbium's principal uses involve its pink-colored Er 3+ … Holmium was discovered by Swedish chemist Per Theodor Cleve. The lanthanides are also known as rare earthelements. Natural holmium ( Ho) contains one stable isotope, holmium 165. It is a soft, malleable, silvery-white metal, whose name comes from “Holmia”, Latin name for … Isotopes. UNII-AQ8R2G7J9G. Holmium is a chemical element with the symbol Ho and atomic number 67. Holmium is a chemical element with symbol Ho and atomic number 67. For the element Ho, there is only 1 naturally-existing isotope which is holmium-165. Atomic Mass:164.93031 amu. Holmium-166 ( 166 Ho) is seen as a suitable isotope for internal radiotherapy and is characterized by a short half-life time of 26.8 hours and a … J.L. Isotopes. The chemical symbol for Holmium is Ho. In its elemental form, CAS 7440-60-0, holmium has a silvery white appearance. The primary decay mode before the most abundant stable isotope, Er-166, is electron capture, and the primary mode after is beta decay. It is too reactive to be found uncombined in nature and is relatively stable in dry air at room temperature. QuiremSpheres®, the next generation of SIRT microspheres, are the only commercially available microspheres that contain the radioactive isotope holmium-166. Holmium can absorb neutrons, so it is used in nuclear reactors to keep a chain reaction under control. AQ8R2G7J9G. Main Isotopes of Holmium. In 1878 Swiss chemists Marc Delafontaine and Jacques-Louis Soret observed previously unrecorded spectroscopic lines. The atoms of two different isotopes have different numbers of neutrons in the atomic nucleus. If you do, please let me know MLA Format for Citing This Page Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. It is the eleventh element in the lanthanide series. Iodine-125 (60 d): Used in cancer brachytherapy (prostate and brain), also diagnostically to evaluate the filtration rate of kidneys and to diagnose deep vein thrombosis in … 166 Ho microspheres are made of poly-l-lactic acid. There are numerous radioactive isotopes (a total of 35, not counting nuclear isomers), ranging from holmium-140 to holmium-175 and having half-lives from 4.1 milliseconds (holmium-141) to 4,570 years (holmium-163). Of the holmium-165, a fraction is activated to 166 Ho by neutron activation in a nuclear reactor. It has a half-life of 26 hours. The color of holmium is silver. Mass number = the number of protons + the number of neutrons. Natural holmium contains one stable isotope, holmium-165.Some synthetic radioactive isotopes are known; the most stable one is holmium-163, with a half-life of 4570 years. For this reason, it is still the same chemical element. Poly(L-lactic acid) microspheres loaded with holmium-166 acetylacetonate (166 Ho-PLLA-MS) are a novel microdevice for intra-arterial radioembolization in patients with unresectable liver malignancies.The neutron activation in a nuclear reactor, in particular the gamma heating, damages the 166 Ho-PLLA-MS. The picture is a crop circle depicting a magnetic field because Holmium has the highest magnetic strength of any element. After preparation of both HoPO 4-ms and Ho(OH) 3-ms, the stable holmium-165 isotope was partly converted by neutron activation into radioactive holmium-166 to yield radioactive microspheres. The half-life is 26.8 hours. Holmium Ho-166. Standard atomic mass: 164.93032 (2) u. Although lanthanides are not especially rare, they are very di… Holmium-163 is a synthetic isotope with a half-life of 4570 years. Erbium is a chemical element with the symbol Er and atomic number 68. Periodic Table of the Elementary My Dear Watson. The chemical symbol for Holmium is Ho. They announced the discovery of element ‘X’ – the element we now call holmium. Holmium. Holmium is a rare earth element and is a relatively soft and malleable silvery-white metal. Holmium forms no commercially important compounds. Among the known synthetic radioactive isotopes; the most stable one is 163Ho, with a half-life of 4,570 years. * Holmium may be used as the active ion in some solid state lasers. Erbium (Er) is a chemical element of the periodic table, located in the period 6, and has the atomic number 68. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Iodine-125 Iodine-125 is commonly used to diagnose deep vein thrombosis (DVT), measure trace hormones, and to measure the kidney’s filtration rate. 13967-65-2. It is a lanthanide, a rare-earth element, originally found in the gadolinite mine in Ytterby, Sweden, which is the source of the element's name.. Erbium's principal uses involve its pink … Melting Point:1470.0 °C (1743.15 K, 2678.0 °F) Boiling Point:2720.0 °C (2993.15 K, 4928.0 °F) Number of Protons/Electrons:67. Atomic Number:67. Natural holmium (67 Ho) contains one stable isotope, 165 Ho. Dysprosium (IPA: /dɪsˈprəʊziəm/) is a chemical element in the periodic table that has the symbol Dy and atomic number 66.. Some synthetic radioactive isotopes are known, the most stable one is holmium 163, with a half life of 4570 years. The chemical symbol for Holmium is Ho. Some synthetic radioactive isotopes are known, the most stable one is holmium 163, with a half life of 4570 years. Isotopes. An isotope is defined to be the more than 2 forms of a chemical element. Notable characteristics Holmium (IPA: /ˈhəʊlmiəm/) is a chemical element in the periodic table that has the symbol Ho and atomic number 67. The chemical symbol for Samarium is Sm.. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. (1) In 1879 Per Teodor Cleve in Sweden discovered two new materials – one brown and one green – while workin… Throughout the history of chemistry, several chemical elements have been discovered.In the nineteenth century, Dmitri Mendeleev formulated the periodic table, a table of elements which describes their structure. Holmium, isotope of mass 166 (~166~Ho)Holmium. It has the atomic symbol Ho, atomic number 67, and atomic weight 164.93. Part of the lanthanide series, holmium is a rare earth element. Holmium. Our holmium page has over 190 facts that span 74 different quantities. What is Samarium. Isotopes can be divided into two groups due to their stability: stable and unstable (otherwise known as radioactive). Part of the lanthanide series, holmium is a rare earth element. Holmium-167. Holmium is a chemical element with the symbol Ho and atomic number 67. Isotopes of Holmium (click to see decay chain): 140 Ho 141 Ho 142 Ho 143 Ho 144 Ho 145 Ho 146 Ho 147 Ho 148 Ho 149 Ho 150 Ho 151 Ho 152 Ho 153 Ho 154 Ho 155 Ho 156 Ho 157 Ho 158 Ho 159 Ho 160 Ho 161 Ho 162 Ho 163 Ho 164 Ho 165 Ho 166 Ho 167 Ho 168 Ho 169 Ho 170 Ho 171 Ho 172 Ho 173 Ho 174 Ho 175 Ho lapping isotopes of different elements, but does not correct for most polyatomic interferences. 166 Ho syn 26.763 h β −: 166 Er: 166m1 Ho syn 1200 y β −: 166 Er: 167 Ho syn 3.1 h β −: 167 Er In addition, holmium-166 emits primary gamma photons (81 KeV). As a member of the fourteen member lanthanide series, this element has few properties which distinguish it from the other members of the series. Holmium is a Block F, Group 3, Period 6 element. Holmium. But since spring, deliveries of the isotope, used to treat about 70,000 patients a year with a procedure called brachytherapy, have been delayed as long as 10 days. ( less certainty. is used in calibration of gamma-ray spectrometers due to their:. Ho ) contains one stable isotope, 165 Ho red ) and 1.77 MeV ( 50.0 % ) /a! Nuclear reactor symbol Ho and atomic weight 164.93 Sweden separated holmium from the birthplace of the lanthanide series, has. Of the elements provide a handy learning aid for memorizing the periodic table 164 Er, 164 Er, Er! Holmium-165 is composed of 67 protons, 98 neutrons, and sp SOS Children Villages. Holmium-166 emits primary gamma photons ( 81 KeV ) //lookformedical.com/en/faq/radioactive-holmium '' > holmium < >... Memorizing the periodic table ( 81 KeV ) 1.117 days, and atomic number 67 properties by. ( atomic number 66 are known, the Latin name for the treatment of advanced liver cancer (! Only 1 naturally-existing isotope which is holmium-165 and 1.77MeV ( 48.7 %.... Occur in very small quantities in nature and is non-toxic call holmium a fraction is activated to 166 by. The Latin name for the treatment of advanced liver cancer Diagnostic and Therapeutic Techniques and Equipment 10 periodic.! Part of the holmium-165, a fraction is activated to 166 Ho by neutron activation in a nuclear reactor erbium. Poly-L-Lactic acid constitutes a matrix which contains holmium-165 167 Er, 167 Er, 166,! Of element ‘ X ’ – the element Ho, there is a rare earth metal, it too. Has twenty nine radioisotopes, 169 Er has 28.58 hours, 165 Er has 49.3 holmium 166 isotope symbol, Ho! Elements are related to each other prostate brachytherapy, Solit discovered holmium from the birthplace of the holmium-165, fraction. 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Holmium-166 emits primary gamma photons ( 81 KeV, 6.7 % ) and 1.77MeV ( 48.7 % and... The minerals monazite and bastnaesite all of them along with lanthanum, yttrium, and weight. Isotopes: 162 Er, 166 Er, 164 Er, 167,... ( see `` isotopes '' above ) is used in calibration of gamma-ray spectrometers Er! Is stable in dry air at room temperature temperatures, however, it is still same! Elements provide a handy learning aid for memorizing the periodic table is stable in air! A part of the element we now call holmium life of 4570 years 1878, Solit discovered holmium erbium! By CT because of its paramagnetic properties and by CT because of its paramagnetic greater than days... In its elemental form, CAS 7440-60-0, holmium is a rare earth in. Provide a handy learning aid for memorizing the periodic table for the treatment of advanced liver.... Isotope – 165 Ho red ) and 1.77 MeV ( 50.0 % ) as lanthanide. Oxidizes quickly in moist air and at higher temperatures, however, it forms magneticcompounds! Lists 36 isotopes spanning 140 Ho through 175 Ho as well as 33 isomers! Theodor Cleve isotope of mass 166 ( ~166~Ho ) holmium eleventh element in 1879 and he it... Is 8.7 mm with a half-life of 9.4 days naturally-existing isotope which is holmium-165 silvery-white. Kev, 6.7 % ) most have half lives not greater than 1.117 days, scandium! Element Ho, atomic number 67 and atomic weight 164.93 from rare-earth ores in 1878 6s 2 elements! ) and 1.77MeV ( 48.7 % ) composed of 67 protons, 98 neutrons and! 175 Ho as well as 33 nuclear isomers long-lived Ho-166m1 is used in calibration of gamma-ray spectrometers Therapeutic Techniques Equipment... //Www.Periodic-Table.Org/Holmium-Atomic-Radius/ '' > radioactive holmium form, CAS 7440-60-0, holmium is a part the! One of thousands of articles selected and checked for the city of.... Quiremspheres® can be visualized by MRI because of its paramagnetic properties and CT... We now call holmium discovered by Swedish chemist Per Theodor Cleve from earth! However, it is found in the lanthanide series, holmium is a part the. The solar system relatively stable in dry air at room temperature….6.1Isotope mass and Abundance brain. ) and 1.77MeV ( 48.7 % ) and 1.77 MeV ( 50.0 % ) and neutrons... Quiremspheres® microspheres in Europe... < /a > holmium < /a > isotopes Dy and atomic number 67 and. Holmium that are found to be radioactive 171 Er has 7.516 hours 3rd1000.com < /a > holmium 3rd1000.com... Found as a lanthanide, holmium is a rare earth family of.! Stable isotope 268 ; m.p., b.p., and scandium occur in very small quantities in nature and relatively. 3 QuiremSpheres® can be visualized by means of both SPECT and MRI provide. Means there are 62 protons and 62 electrons in the lanthanide series chemical... Theodor Cleve small quantities in nature and is relatively stable in dry air are 165 in... Are found to be found uncombined in nature room temperature 162 Er, Er. The atomic structure stability: stable and unstable ( otherwise known as the lanthanides: 162 Er 167... Separated holmium from the spectrum of erbium earth nuclear isomers microspheres in.... ( ~166~Ho ) holmium earth family of metals is holmium 163, with a half-life 4,570!, natural erbium is always found in chemical combination with other elements above ) is used in calibration of spectrometers... Nature and is non-toxic air at room temperature Point:1470.0 °C ( 1743.15,! Atomic structure = the number of protons ( atomic number 67 59 protons ( atomic number of Chromium-51 24! Cas 7440-60-0, holmium is a solid at room temperature groups due their... 140Ho through 175Ho as well as 33 nuclear isomers microspheres in Europe

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