Half-life determinations of Rb and Cs fission products available at an on-line mass separator have been made for several neutron-rich Rb, Sr, Cs, and Ba isotopes using both β-multiscale and γ …

1981年1月1日 · The surface ionization process provides a means of selective separation of the isotopes of Rb and Cs by the use of a Ta ionizing surface and of the isotopes of Sr and Rb, or …

2023年1月10日 · 本研究以六盘山朝那湫湖泊73cm长度(1743~2012A.D.的沉积序列)岩芯沉积物Rb/Sr比值为分析对象, 结合同一岩芯其他主要元素以及古气候代用指标(TOC、C/N比值、 δ …

The existence of an isomeric state in 90Rb appears likely in view of the measured half-lives and y spectrum of this isotope. A mass-spectrometer has been installed directly in the external beam …

Rb 、Sr这两种微量元素中通常包含了重要的成岩信息 , 尤其是在研究花岗岩的成因方面具有独特之处 。因为花岗岩岩石中, Sr 通常以类质同象的形式存在于斜长石和磷灰石等早期形成的矿物中 …

1996年6月1日 · Hydrous partial melting experiments performed between 650 and 750 °C at 200 MPa (H 2 O) on synthetic metapelite compositions (quartz + albite + muscovite + biotite …

1996年5月1日 · Hydrous partial melting experiments performed between 650 and 750 °C at 200 MPa (H20) on synthetic metapelite compositions (quartz + albite + muscovite + biotite min- …

The strong depletion of the large 'dispersed' elements (K, Rb, Cs, Sr, Ba, U, Th) in dredge basalts has been ascribed to their derivation from a mantle which has undergone previous …

1994年3月1日 · In this paper, the geochemical behaviour of 90 Zr is discussed by making use of the relative retentivity inferred from the isotopic abundance of Sr. The excess in 90 Zr …

1979年4月1日 · Half-lives of the extremely neutron-rich isotopes Rb 9 1 − 9 8, Sr 9 4 − 9 8, Y 9 6 − 9 8, Cs 1 4 2 − 1 4 6, Ba 1 4 3 − 1 4 8, La 1 4 4 − 1 4 9, and Ce 149 were determined. The …