It is of special interest to search for those unknown α-emitters in the transuranium region which (i) are located along the path of α-decay chains that start in the superheavy element region, and (ii) establish a li...It is of special interest to search for those unknown α-emitters in the transuranium region which (i) are located along the path of α-decay chains that start in the superheavy element region, and (ii) establish a link to nuclides with known masses. The knowledge of all Qαvalues in an α-decay chain allows obtaining展开更多
As radiochemical techniques have an unsurpassed sensitivity, they are best apt to search for, to identify and to determine very small α-decay branches of longer-lived transuranium nuclides. Therefore, we have develop...As radiochemical techniques have an unsurpassed sensitivity, they are best apt to search for, to identify and to determine very small α-decay branches of longer-lived transuranium nuclides. Therefore, we have developed a chemical separation scheme to search for the 'missing' α-decay branch in 239Cm (T1/2≈3 h). Details of the motivation for this experiment and preliminary results from the first experiments are given elsewhere in this report.展开更多
The overall separation scheme to obtain a chemically purified Cm sample for the search of an α-decay branch in 239Cm (see for preliminary results) is described in Part Ⅰof this contribution. The Part Ⅱdescribes det...The overall separation scheme to obtain a chemically purified Cm sample for the search of an α-decay branch in 239Cm (see for preliminary results) is described in Part Ⅰof this contribution. The Part Ⅱdescribes details of the liquid chromatographic separation of a Cm fraction - modeled with lanthanide (Ln) tracers. The main goal of the scheme was to produce fast, reliably and with a high and controllable yield Cm fractions which are free from unwanted α-activities. This separation scheme was not optimized to separate elements which may strongly interfere in γ-spectroscopic studies.展开更多
文摘It is of special interest to search for those unknown α-emitters in the transuranium region which (i) are located along the path of α-decay chains that start in the superheavy element region, and (ii) establish a link to nuclides with known masses. The knowledge of all Qαvalues in an α-decay chain allows obtaining
文摘As radiochemical techniques have an unsurpassed sensitivity, they are best apt to search for, to identify and to determine very small α-decay branches of longer-lived transuranium nuclides. Therefore, we have developed a chemical separation scheme to search for the 'missing' α-decay branch in 239Cm (T1/2≈3 h). Details of the motivation for this experiment and preliminary results from the first experiments are given elsewhere in this report.
文摘The overall separation scheme to obtain a chemically purified Cm sample for the search of an α-decay branch in 239Cm (see for preliminary results) is described in Part Ⅰof this contribution. The Part Ⅱdescribes details of the liquid chromatographic separation of a Cm fraction - modeled with lanthanide (Ln) tracers. The main goal of the scheme was to produce fast, reliably and with a high and controllable yield Cm fractions which are free from unwanted α-activities. This separation scheme was not optimized to separate elements which may strongly interfere in γ-spectroscopic studies.
