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Comparative Studies of Chemical Effects following Nuclear Reactions and Transformations on Metal Organic Phenyl Compounds; Etudes Comparatives des Effets Chimiques Induits par les Reactions et les Transformations Nucleaires sur des Composes Phenylmetalliques; 0421 0420 0410 0414 ; Estudios Comparativos de los Efectos Quimicos de las Reacciones y Transformaciones Nucleares en Compuestos Fenil-Organometalicos

Conference:

Abstract

A study of the chemical effects created by the energetic recoil atoms of nuclear reactions in solids and liquids was made on the basis of a broad comparison of the products formed by (n, {gamma}) and (n, 2n) processes in the metalphenyl compounds of germanium, tin, lead, arsenic and antimony. In addition, the radioactive recoil products formed after the K-capture process on Ge{sup 68} - tetraphenyl are compared with the results from the (n, {gamma}) -process on Ga-triphenyl and the (n,p) process on Ge-tetra phenyl. Finally, the studies include the {beta}{sup -} transition on Ge{sup 77}-tetraphenyl to As{sup 77}. Applying different separation methods, e.g. adsorption chromatography on alumina, ion exchange and electrophoresis, the various radioactive recoil products were separated and the individual yields determined. It was found that in nuclear reactions the compounds of the mentioned metals having identical ligands formed practically the same classes of recoil products. The yield distribution however reveals characteristic alterations between the (n, {gamma}) and (n, 2n) reaction. Only a small influence on the yields is perceptible when irradiations are performed in liquids and solutions. The large differences found for the new compounds formed by nuclear transformations are striking, not only in the kind of  More>>
Authors:
Merz, E.; Riedel, H. J. [1] 
  1. Kernforschungsanlage, Juelich, Federal Republic of Germany (Germany)
Publication Date:
Apr 15, 1965
Product Type:
Conference
Report Number:
IAEA-SM-57/19
Resource Relation:
Conference: Symposium on Chemical Effects Associated with Nuclear Reactions and Radioactive Transformations, Heidelberg (Germany), 7-11 Dec 1964; Other Information: 12 refs., 4 tabs., 2 figs.; Related Information: In: Chemical Effects of Nuclear Transformations. Vol. II. Proceedings of the Symposium on Chemical Effects Associated with Nuclear Reactions and Radioactive Transformations| 572 p.
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; ADSORPTION; ALUMINIUM OXIDES; ANTIMONY; ARSENIC 77; CHROMATOGRAPHY; CRYSTAL DEFECTS; ELECTROPHORESIS; GERMANIUM 68; GERMANIUM 77; IRRADIATION; NUCLEAR REACTION YIELD; NUCLEAR REACTIONS; RECOILS; TRANSFORMATIONS
OSTI ID:
22188121
Research Organizations:
International Atomic Energy Agency, Vienna (Austria); Joint Commission on Applied Radioactivity of the International Council of Scientific Unions, Paris (France)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M3328012622
Submitting Site:
INIS
Size:
page(s) 179-194
Announcement Date:
Feb 06, 2014

Conference:

Citation Formats

Merz, E., and Riedel, H. J. Comparative Studies of Chemical Effects following Nuclear Reactions and Transformations on Metal Organic Phenyl Compounds; Etudes Comparatives des Effets Chimiques Induits par les Reactions et les Transformations Nucleaires sur des Composes Phenylmetalliques; 0421 0420 0410 0414 ; Estudios Comparativos de los Efectos Quimicos de las Reacciones y Transformaciones Nucleares en Compuestos Fenil-Organometalicos. IAEA: N. p., 1965. Web.
Merz, E., & Riedel, H. J. Comparative Studies of Chemical Effects following Nuclear Reactions and Transformations on Metal Organic Phenyl Compounds; Etudes Comparatives des Effets Chimiques Induits par les Reactions et les Transformations Nucleaires sur des Composes Phenylmetalliques; 0421 0420 0410 0414 ; Estudios Comparativos de los Efectos Quimicos de las Reacciones y Transformaciones Nucleares en Compuestos Fenil-Organometalicos. IAEA.
Merz, E., and Riedel, H. J. 1965. "Comparative Studies of Chemical Effects following Nuclear Reactions and Transformations on Metal Organic Phenyl Compounds; Etudes Comparatives des Effets Chimiques Induits par les Reactions et les Transformations Nucleaires sur des Composes Phenylmetalliques; 0421 0420 0410 0414 ; Estudios Comparativos de los Efectos Quimicos de las Reacciones y Transformaciones Nucleares en Compuestos Fenil-Organometalicos." IAEA.
@misc{etde_22188121,
title = {Comparative Studies of Chemical Effects following Nuclear Reactions and Transformations on Metal Organic Phenyl Compounds; Etudes Comparatives des Effets Chimiques Induits par les Reactions et les Transformations Nucleaires sur des Composes Phenylmetalliques; 0421 0420 0410 0414 ; Estudios Comparativos de los Efectos Quimicos de las Reacciones y Transformaciones Nucleares en Compuestos Fenil-Organometalicos}
author = {Merz, E., and Riedel, H. J.}
abstractNote = {A study of the chemical effects created by the energetic recoil atoms of nuclear reactions in solids and liquids was made on the basis of a broad comparison of the products formed by (n, {gamma}) and (n, 2n) processes in the metalphenyl compounds of germanium, tin, lead, arsenic and antimony. In addition, the radioactive recoil products formed after the K-capture process on Ge{sup 68} - tetraphenyl are compared with the results from the (n, {gamma}) -process on Ga-triphenyl and the (n,p) process on Ge-tetra phenyl. Finally, the studies include the {beta}{sup -} transition on Ge{sup 77}-tetraphenyl to As{sup 77}. Applying different separation methods, e.g. adsorption chromatography on alumina, ion exchange and electrophoresis, the various radioactive recoil products were separated and the individual yields determined. It was found that in nuclear reactions the compounds of the mentioned metals having identical ligands formed practically the same classes of recoil products. The yield distribution however reveals characteristic alterations between the (n, {gamma}) and (n, 2n) reaction. Only a small influence on the yields is perceptible when irradiations are performed in liquids and solutions. The large differences found for the new compounds formed by nuclear transformations are striking, not only in the kind of typical products but also in their percentage yields. Thus, several recoil products of Ge and Ga with metalorganic character were found by nuclear reactions on Ge-tetraphenyl that could not be detected at all by the K-capture process on Ge{sup 68}-tetraphenyl. The {beta}{sup -} decay on Ge{sup 77}-tetraphenyl produces practically the same chemical compounds as were observed by nuclear reactions. However, a remarkable increase in the portion of the labelled parent molecules (retention) is typical for the {beta}{sup -} transition. The results are discussed on the basis of theoretical considerations of the amount of kinetic energy transferred to the reacting molecule by the nuclear recoil and the resulting excitation. The hypothesis is put forward that the kind and quantity of certain new radioactive species produced in connection with nuclear events is less a function of the nature and concentration of primary recoil fragments than are the ions, radicals and lattice defects imparted to the irradiated materials by secondary recoil effects (elastic and inelastic interactions) , including the peculiar influence of oxygen. (author) [French] Les auteurs ont etudie les effets chimiques provoques par les atomes chaud de recul resultant des reactions nucleaires dans les solides et dans les liquides en se fondant sur une vaste comparaison des produits des processus (n,{gamma}) et (n,2n) dans les composes phenyles du germanium, de l'etain, du plomb, de l'arsenic et de l'antimoine. En outre, ils ont compare les produits de recul radioactifs formes apres capture K dans le tetraphenyl- germanium-{sup 68}Ge avec les resultats du processus (n,{gamma}) dans le triphenylgalliumet du processus (n,p) sur le tetraphenylgermanium. Enfin, ils ont etudie la transition {beta}{sup -} dans laquelle {sup 77}Ge est remplace par {sup 77}As dans le compose. En appliquant differentes methodes de separation, par exemple la chromatographie d'adsorption sur alumine, l'echange d'ions et l'electrophorese, ils ont separe les divers produits de recul radioactifs et determine les rendements individuels. Ils ont constate que, dans les reactions nucleaires, les composes des metaux cites ayant des coordinats identiques forment pratiquement les memes classes.de produits de recul. Toutefois, pour la distribution des rendements, il y a des differences caracteristiques entre la reaction (n,{gamma}) et la reaction (n,2n). L'influence sur les rendements est a peine perceptible lorsque les irradiations ont lieu dans des liquides ou des solutions. Mais les differences trouvees pour les nouveaux composes formes par des transformations nucleaires sont frappantes, en ce qui concerne non seulement la categorie de produits typiques, mais aussi les rendements en pourcentage. Ainsi, les auteurs ont trouve, apres les reactions nucleaires sur le tetraphenylgermanium, plusieurs produits de recul de Ge et de Ga a caractere organometallique qu'il n'etait pas possible de deceler apres le processus de capture K dans le tetraphenylgermanium-{sup 68}Ge. La decroissance {beta}{sup -} dans le tetraphenylgermanium-{sup 77}Ge produit pratiquement les memes composes chimiques que ceux que l'on observe a la suite des reactions nucleaires. Toutefois, une augmentation notable de la fraction molecules generatrices marquees (retention) est typique de la transition {beta}{sup -}. Les resultats sont etudies a la lumiere de considerations theoriques sur la quantite d'energie cinetique transferee par le recul nucleaire a la molecule en reaction et l'excitation qui en resulte. Les auteurs emettent l'hypothese que le genre et la quantite de certaines nouvelles especes radioactives produites lors des evenements nucleaires sont fonction moins de la nature et de la concentration des fragments de recul primaires que des ions, des radicaux et des defauts de reseau induits dans les matieres irradiees par les effets de recul secondaires (interactions elastiques et inelastiques) , y compris l'influence particuliere de l'oxygene. (author) [Spanish] Los autores estudiaron los efectos quimicos producidos por atomos de retroceso de gran energia procedentes de reacciones nucleares en solidos y liquidos basandose en una amplia comparacion de los productos formados por los procesos (n, {gamma}) y (n,2n) en los compuestos fenilmetalicos de germanio, estano, cobre, arsenico y antimonio. Ademas, compararon los productos radiactivos de retroceso formados como consecuencia de los procesos de captura K en {sup 68}Ge-tetrafenilo con los resultados obtenidos mediante el proceso (n, {gamma}) en Ga-trifenilo y el proceso (n,p) en Ge-tetrafenilo. Por ultimo, estudiaron tambien la transicion {beta}{sup -} del Ge-tetrafenilo a {sup 77}As. Aplicando diferentes metodos de separacion, por ejemplo, cromatografia de adsorcion en alumina, intercambio ionico y electroforesis, separaron los distintos productos radiactivos de retroceso y determinaron los rendimientos. Observaron que en las reacciones nucleares los compuestos de los metales mencionados que tienen ligandos identicos forman practicamente las mismas clases de productos de retroceso. Sin embargo, la distribucion del rendimiento pone de manifiesto diferencias caracteristicas entre la reaccion (n, {gamma}) y la reaccion (n,2n). Solo es perceptible una ligera influencia en los rendimientos cuando la irradiacion se efectua en liquidos y soluciones. Son sorprendentes las diferencias observadas en los nuevos compuestos formados por transformaciones nucleares, no solo en la clase de productos quimicos, sino tambien en su rendimiento porcentual. Asi, como consecuencia de reacciones nucleares en Ge-tetrafenilo, los autores observaron varios productos de retroceso del Ge y del Ga de caracter organometalico, que no habian podido detectarse en absoluto por el proceso de captura K en el {sup 68}Ge-tetrafenilo. La desintegracion {beta}{sup -} del {sup 77}Ge-tetrafenilo produce practicamente los mismos compuestos quimicos que las reacciones nucleares. Sin embargo, en la transicion {beta}{sup -}, es tipico un aumento muy notable en la proporcion de las moleculas originales marcadas (retencion). Los autores examinan los resultados partiendo de consideraciones teoricas sobre la cantidad de energia cinetica transferida por los nucleos de retroceso a la molecula que reacciona y la excitacion resultante. Formulan la hipotesis de que la indole y cantidad de ciertas nuevas especies radiactivas formadas a raiz de procesos nucleares no depende tanto de la naturaleza y concentracion de los fragmentos de retroceso primarios como de los iones, radicales y defectos de la red cristalina producidos en los materiales irradiados por los efectos de retroceso secundarios (interacciones elasticas e inelasticas), entre ellas la influencia peculiar del oxigeno. (author) [Russian] Izuchenie himicheskih jeffektov, sozdavaemyh v processe jadernyh reakcij atomami otdachi bol'shoj jenergii v tverdyh telah i zhidkostjah, provodilos' na osnovanii shirokogo sopostavlenija produktov, obrazovannyh reakcijami (p,{gamma}) i (p, 2p) v soedinenijah fenila s metallami , kak to: germaniem, olovom, svincom, mysh'jakom i sur'moj. V dopolnenie k jetomu radioaktivnye produkty otdachi, obrazovannye posle K-zahvata na tetrafenile germanija-68, sravnivajutsja s rezul'tatami reakcii (p,7) na trifenile gallija i reakcii (p, {gamma}) na tetrafenile germanija. Nakonec, jeto issledovanie rasprostranilos' na {beta}{sup -}-perehod tetrafenila germanija-77 v mysh'jak-77. S pomoshh'ju razlichnyh metodov otdelenija, naprimer, hromatografii adsorbcii na glinozeme, ionnogo obmena i jelektroforeza byli otdeleny razlichnye radioaktivnye produkty otdachi i opredeleny vyhody kazhdogo iz nih. Ustanovleno, chto v jadernyh reakcijah soedinenij vysheupomjanutyh metallov, imejushhih odinakovuju strukturu svjazej, obrazujutsja pochti te zhe kategorii produktov otdachi. Odnako raspredelenie vyhodov obnaruzhivaet harakternye rashozhdenija mezhdu reakcijami (p,{gamma}) i reakcijami (p, 2p). Obnaruzhivaetsja tol'ko neznachitel'noe vlijanie obluchenija na vyhody pri vozdejstvii ego sootvetstvenno na zhidkosti i rastvory. Porazhajut znachitel'nye rashozhdenija, obnaruzhivaemye dlja novyh soedinenij, poluchennyh v rezul'tate jadernyh prevrashhenij; jeti rashozhdenija kasajutsja ne tol'ko vida tipichnyh produktov, no takzhe i procentnoj doli ih vyhoda. Tak, naprimer, rjad produktov otdachi germanija i gallija metalloorganicheskogo haraktera byli obnaruzheny v jadernyh reakcijah na tetrafenile germanija-77, chego vovse ne nabljudalos' pri processah K-zahvata na tetrafenile germanija-68. {beta}{sup -}-raspad na tetrafenile germanija-77 vedet k obrazovaniju pochti takih zhe samyh himicheskih soedinenij kak te, kotorye nabljudalis' v jadernyh reakcijah. Odnako dlja{beta}{sup -}-perehoda tipichno znachitel'noe uvelichenie doli mechenyh ishodnyh molekul (uderzhanija). Jeti rezul'taty obsuzhdajutsja na osnovanii teoreticheskih soobrazhenij otnositel'no kolichestva kineticheskoj jenergii, soobshhennoj jadernoj otdachej uchastvujushhim v reakcii molekulam, i otnositel'no vyzyvaemogo vozbuzhdenija. Vydvigaetsja predpolozhenie, chto vid i kolichestvo nekotoryh novyh radioaktivnyh raznovidnostej, obrazujushhihsja v svjazi s jadernymi prevrashhenijami, zavisjat v men'shej mere ot haraktera i koncentracii pervichnyh oskolkov otdachi, chem ot ionov, radikalov i defektov reshetki, vyzvannyh v obluchennom materiale vtorichnymi vozdejstvijami otdachi (uprugimi i neuprugimi vzaimodejstvijami), a takzhe ot osobogo vlijanija kisloroda. (author)}
place = {IAEA}
year = {1965}
month = {Apr}
}