Measurement of 134Xe(n,2n)133m,gXe reaction cross sections in the 14 MeV region with detailed uncertainty quantification

分类： 物理学 >> 核物理学 提交时间： 2023-05-31

Junhua Luo Juncheng Liang Li Jiang Fei Tuo Liang Zhou Long He

摘要： lead-shielded HPGe detector and offline gray spectra of the residual product were used to measure the cross-section (CS) and ratios of isomeric CS (sm/sg) in 134Xe(n,2n)133m,gXe reactions at different energies including 13.5, 13.8, 14.1, 14.4, and 14.8 MeV, relative to 93Nb(n,2n)92mNb reaction CS. The target was high-purity natural Xe gas under high pressure. T(d,n)4He reaction was used to produce neutrons. The TALYS code (1.95 version) for nuclear reactions was used for calculations along with the default parameters and various nuclear level density models. The uncertainties present in the measured CSdata were thoroughly analyzed using the covariance analysis method. The results were subsequentlycompared to the theoretical values, evaluation data, and previous experimental findings. Thus, the CS data of the 134Xe(n,2n)133mXe and 134Xe(n,2n)133gXe reactions and the corresponding isomeric CS ratios at 13.5,13.8 and 14.1 MeV neutron energies are reported for the first time. This work advances our knowledge of pre-equilibrium emission in the (n,2n) reaction channel by resolving inconsistencies in Xe data.

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