Research of Xi'an Pulsed Reactor(XAPR)for Irradiation Conditions of 40Ar/39Ar Dating Sample
Shi Yajing
Liu Hanbin
Li Junjie
Zhang Jia
Jin Guishan
Han Juan
Zhang Jianfeng
Shi Xiao
Zhang Wanfeng
Shi Jia
Abstract：Domestic sample irradiation resources are limited,with few reactors available,infrequent reactor startups,and a lack of systematic research on the parameters for reactor irradiation samples.These limitations hinder the progress of scientific research in 40Ar/39Ar dating.Therefore,it is essential to develop new irradiation resources.For the first time,the irradiation conditions for 40Ar/39Ar dating samples in the Xi'an Pulsed Reactor(XAPR)were studied.The radial and axial gradient changes in neutron flux were determined using the biotite standard material ZBH-25,and the correction factors for side reactions were obtained using potassium salt and calcium salt.The results indicate that the radial J value of the irradiation channel is 0.49％,and a peak neutron flux,suggesting that the sample is irradiated in the center of the reactor.The axial neutron flux gradient in the irradiation channel is 0.54％/cm,and the correction factors in the XAPR irradiation channel are(40Ar/39Ar)K=0.002 082 6,(39Ar/37Ar)Ca=0.000 776 92,(36Ar/37Ar)Ca=0.000 299 98.The standard material ZBH-25 biotite was dated,confirming that the reactor meets the irradiation conditions for 40Ar/39Ar dating samples and can serve as a new irradiation source.
Keywords：Xi'an Pulsed Reactor40Ar/39Ar datingirradiation conditionneutron fluence gradientcorrection factorgeochemistry
Publication Date：2025-01-14
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 88-96 )