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arXiv 0809.2248nucl-ex
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中子干涉法精密测量n-3 He非相干散射长度

Precision Measurement of the n-3He Incoherent Scattering Length Using Neutron Interferometry

M. G. Huber, M. Arif, T. C. Black, W. C. Chen, T. R. Gentile, D. S. Hussey, D. Pushin, F. E. Wietfeldt, L. Yang

摘要:

我们报告的第一个测量的低能中子- $^3$ He非相干散射长度使用中子干涉术:$b_i' = (-2.512\pm 0.012{statistical}\pm0.014{systematic})$调频。这与最近使用AV 18 + 3 N电势的计算结果非常一致。中子- $^3$ He散射长度对于检验和发展包括三种核子力的核势模型、少体核系统的有效场论以及液氦中量子激发的中子散射测量是重要的。这项工作证明了极化核靶在中子干涉仪中的首次使用。

英文摘要:

We report the first measurement of the low-energy neutron-$^3$He incoherent scattering length using neutron interferometry: $b_i' = (-2.512\pm 0.012{statistical}\pm0.014{systematic})$ fm. This is in good agreement with a recent calculation using the AV18+3N potential. The neutron-$^3$He scattering lengths are important for testing and developing nuclear potential models that include three nucleon forces, effective field theories for few-body nuclear systems, and neutron scattering measurements of quantum excitations in liquid helium. This work demonstrates the first use of a polarized nuclear target in a neutron interferometer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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