In:
Journal of Analytical Atomic Spectrometry, Royal Society of Chemistry (RSC), Vol. 38, No. 8 ( 2023), p. 1540-1548
Abstract:
The Min Jiang Testing Reactor (MJTR) is a new irradiation facility for 40 Ar/ 39 Ar geochronology. In this study, we systematically evaluated the neutron flux field gradients of the MJTR for irradiation of samples for 40 Ar/ 39 Ar dating and yielded an average neutron flux equivalence of 0.21 × 10 −4 J h −1 over the neutron irradiation process. The vertical and the horizontal gradients are down to 0.68% cm −1 and 0.45% cm −1 , respectively, indicating a sufficiently wide neutron flux stabilization field for 40 Ar/ 39 Ar sample irradiation. The production rate ratios of interfering reactions are ( 36 Ar/ 37 Ar) Ca : 4.17 ± 0.07 × 10 −4 , ( 39 Ar/ 37 Ar) Ca : 18.4 ± 3.6 × 10 −4 , and ( 40 Ar/ 39 Ar) K : 146.5 ± 42.4 × 10 −4 , within the range of other nuclear reactors worldwide. The J value error can be estimated to be 〈 1‰ (1sd) when the sample is placed close to the irradiation thimble center. Four aliquots of DRA-1 yield a consistent intercalibration factor between ZBH-25 and DRA-1 with an average of 0.183061 ± 0.000432 (1sd, 2.4‰), indicating that the MJTR is suitable for high-precision 40 Ar/ 39 Ar sample irradiation.
Type of Medium:
Online Resource
ISSN:
0267-9477
,
1364-5544
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
1484654-8
detail.hit.zdb_id:
54176-X
SSG:
11
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