AMS Measurement of ⁵³ Mn at CIAE

Abstract

The long-lived isotope 53 Mn cosmogenically produced in situ is a very useful indicator for geochronological dating. A new 53 Mn accelerator-mass-spectrometry (AMS) measurement method is developed based on the HI-13 Tandem Accelerator and ∆E-Q3D detection system at China Institute of Atomic Energy. The performance of 53 Cr isobar separation and suppression is tested by a series of 53 Mn standards and commercial MnO samples. The results show that the ∆E-Q3D detection system brought about an overall suppression factor of more than 10 7 for the interfering isobar 53 Cr.

Large projects at the accelerator mass spectrometry facility at the China Institute of Atomic Energy during the last 12years

“…This modification makes beam current adjustment much easier and transmission efficiency increased obviously due to the improved chromatic dispersion. As a result, a neighboring isotope suppression factor of 10 4 -10 8 could be obtained [3].…”

“…However, the sensitivity and precision of measurement can not meet the requirements from the ever-increasing application fields. Thanks to the improvements of our system in recent years, AMS techniques have been further developed [7][8][9][10][11][12][13][14], optimized [15][16][17][18] and explored [19][20][21][22][23] step by step. The methods developed for AMS measurement of new nuclides, such as the measurements of fission products 93 Zr, 99 Tc, 121m Sn, 126 Sn 129 I and 151 Sm, and the newly developed DE-Q3D detection technique are among the major advances achieved in our laboratory during recent 12 years.…”

AMS measurement of 32Si at the China Institute of Atomic Energy (CIAE)

“…[12]. A new beam line equipped with a DE-Q3D detection system was installed on the HI-13 tandem three years ago [13].…”

Measurement of 59Ni and 63Ni by accelerator mass spectrometry at CIAE

“…In order to measure 59 Ni and 63 Ni at CIAE AMS lab, the method, named DE-Q3D, was developed for effective suppression of isobaric interferences. This method was successfully used for the measurements of 32 Si and 53 Mn [14,15]. In this paper, the details for measuring 59 Ni and 63 Ni by using the DE-Q3D technique are presented.…”