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

被引：21

作者：

Huber, M. G. ^{[1
]}

Arif, M. ^{[2
]}

Black, T. C. ^{[3
]}

Chen, W. C. ^{[2
,4
]}

Gentile, T. R. ^{[2
]}

Hussey, D. S. ^{[2
]}

Pushin, D. A. ^{[2
]}

Wietfeldt, F. E. ^{[1
]}

Yang, L. ^{[2
]}

机构：

[1] Tulane Univ, New Orleans, LA 70118 USA

[2] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA

[3] Univ N Carolina, Wilmington, NC 28403 USA

[4] Indiana Univ, Bloomington, IN 47408 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 20期

基金：

美国国家科学基金会;

关键词：

MONTE-CARLO CALCULATIONS;

D O I：

10.1103/PhysRevLett.102.200401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first measurement of the low-energy neutron-He-3 incoherent scattering length using neutron interferometry: b(i)(')=(-2.512 +/- 0.012 stat +/- 0.014 syst) fm. This is in good agreement with a recent calculation using the AV18+3N potential. The neutron-He-3 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.

引用

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