Search for spontaneous fission in the Atlantis II
Creators
- 1. Marburg Univ. (Germany, F.R.). Fachgebiet Kernchemie
Description
By measuring samples available over a long period of time, the upper limit for the maximum concentration on SHE in chemically enriched samples could be further reduced to: <= 1.6 x 10-14 g/g hence, samples subjected to a special form of enrichment are less than the 'Flerov' value by a factor 30. No SHE was found in the soluble salt (NaCl, etc.) of the hot brine. The main topic of the works during the period of the report when answering the question: can single spontaneous fission transuranium nuclides be responsible for 'Flerov's effect'. The provisional answers are: The following essential TU nuclides can't be: 239Pu, 240Pu, 242Pu, 244Pu, 241Am, 242Cm, 244Cm, 246Cm, 247Cm, 252Cf (marginal). 248Cm, 250Cm, 'Unknown TPu isomers' are not clear. Further work is necessary in the years to come particularly on thoroughly chemically treated samples. One should also mention that other types of 3He counter measurements would be useful. (orig./RB)
Abstract (German)
Durch laengeres Ausmessen vorhandener Proben konnte die Obergrenze fuer die maximale Konzentration an SHE in chemisch angereicherten Proben weiter auf <= 1.6 x 10-14 g/g gesenkt werden. Damit wird in diesen, einer speziellen Anreicherung unterworfenen Proben der 'Flerov'sche' Wert um den Faktor 30 unterschritten. Ebenso wurden im loeslichen Salz (NaCl, etc.) der heissen Salzsole kein SHE gefunden. Das Hauptgewicht der Arbeiten im Berichtszeitraum lag bei der Beantwortung der Frage: Koennen einzelne spontanspaltende Transurannuklide fuer 'Flerov's Effekt' verantwortlich sein. Die vorlaeufigen Antworten sind: Die folgenden, wesentlichen TU-Nuklide koennen es nicht sein: 239Pu, 240Pu, 242Pu, 244Pu, 241Am, 242Cm, 244Cm, 246Cm, 247Cm, 252Cf (marginal). Ungeklaert sind: 248Cm, 250Cm, 'Unbek. TPu-Isomere'. Es sei betont, dass weitere Arbeiten, insbesondere an gruendlicher chemisch behandelten Proben in den naechsten Jahren notwendig sein werden. Ebenso sei erwaehnt, dass andersartige 3He-Zaehler-Messungen nuetzlich waeren. (orig./RB)Additional details
Additional titles
- Original title (German)
- Suche nach Spontanspaltern im Atlantis II-Tief
Publishing Information
- Imprint Title
- Status report 1980 of the scientific sector 'Nuclear Chemistry' promoted by the BMFT (Federal Ministry for Research and Technology)
- Imprint Pagination
- 269 p.
- Journal Page Range
- p. 131-134.
- Report number
- INIS-mf--7117
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 13683135
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- ALPHA SPECTRA; BRINES; EFFICIENCY; MEASURING METHODS; SENSITIVITY; SLURRIES; SPONTANEOUS FISSION; TRANS 104 ELEMENTS
- Descriptors DEC
- DECAY; DISPERSIONS; ELEMENTS; FISSION; MIXTURES; NUCLEAR DECAY; NUCLEAR REACTIONS; SPECTRA; SUSPENSIONS; TRANSPLUTONIUM ELEMENTS; TRANSURANIUM ELEMENTS
Optional Information
- Notes
- Imprint:Statusbericht 1980 des Foerderbereiches Nuklearchemie des BMFT.