The bound coherent neutron scattering lengths of the oxygen isotopes

被引：13

作者：

Fischer, Henry E. ^{[1
]}

Simonson, J. Mike ^{[2
]}

Neuefeind, Joerg C. ^{[3
]}

Lemmel, Hartmut ^{[1
,4
]}

Rauch, Helmut ^{[1
,4
]}

Zeidler, Anita ^{[5
]}

Salmon, Philip S. ^{[5
]}

机构：

[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[2] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA

[4] Vienna Univ Technol, Atominst, A-1020 Vienna, Austria

[5] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 50期

基金：

英国工程与自然科学研究理事会;

关键词：

HYDROGENEOUS LIQUIDS; PARAMETERS; GLASSES; WATER;

D O I：

10.1088/0953-8984/24/50/505105

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The technique of neutron interferometry was used to measure the bound coherent neutron scattering length b(coh) of the oxygen isotopes O-17 and O-18. From the measured difference in optical path between two water samples, either (H2O)-O-17 or (H2O)-O-18 versus (H2O)-O-nat, where nat denotes the natural isotopic composition, we obtain b(coh,) (17O) = 5.867(4) fm and b(coh, 18O) = 6.009(5) fm, based on the accurately known value of b(coh, natO) = 5.805(4) fm which is equal to b(coh, 16O) within the experimental uncertainty. Our results for b(coh, 17O) and b(coh, 18O) differ appreciably from the standard tabulated values of 5.6(5) fm and 5.84(7) fm, respectively. In particular, our measured scattering-length contrast of 0.204(3) fm between O-18 and O-nat is nearly a factor of 6 greater than the tabulated value, which renders feasible neutron diffraction experiments using O-18 isotope substitution and thereby offers new possibilities for measuring the partial structure factors of oxygen-containing compounds, such as water.

引用

页数：11

共 29 条

[1] Theoretical evaluation of neutron-nucleus scattering parameters from experimental data in the 6≤A<60 mass region [J].

Aleksejevs, A ;

Barkanova, S ;

Tambergs, J ;

Krasta, T ;

Waschkowski, W ;

Knopf, K .

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 1998, 53 (10-11) :855-862

[2] Atomic weights of the elements. [J].

de Laeter, J. R. ;

Boehlke, J. K. ;

De Bievre, P. ;

Hidaka, H. ;

Peiser, H. S. ;

Rosman, K. J. R. ;

Taylor, P. D. P. .

PURE AND APPLIED CHEMISTRY, 2009, 81 (08) :1535-1536

[3] Atomic weights of the elements:: Review 2000 -: (IUPAC technical report) [J].

De Laeter, JR ;

Böhlke, JK ;

De Bièvre, P ;

Hidaka, H ;

Peiser, HS ;

Rosman, KJR ;

Taylor, PDP .

PURE AND APPLIED CHEMISTRY, 2003, 75 (06) :683-800

[4] Structural quantum effects in hydrogeneous liquids and glasses - Part II - Experiments using synchrotron radiation [J].

Egelstaff, PA .

PHYSICS AND CHEMISTRY OF LIQUIDS, 2003, 41 (02) :109-121

[5] Structural quantum effects in hydrogeneous liquids and glasses: Part I review of early methods and experiments [J].

Egelstaff, PA .

PHYSICS AND CHEMISTRY OF LIQUIDS, 2002, 40 (03) :203-219

[6] A simple effective method for estimating the [18O] enrichment of water mixtures [J].

Fawdry, RM .

APPLIED RADIATION AND ISOTOPES, 2004, 60 (01) :23-26

[7] New measurements of the coherent and incoherent neutron scattering lengths of 13C [J].

Fischer, H. E. ;

Neuefeind, J. ;

Simonson, J. M. ;

Loidl, R. ;

Rauch, H. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (04)

[8] Neutron and x-ray diffraction studies of liquids and glasses [J].

Fischer, HE ;

Barnes, AC ;

Salmon, PS .

REPORTS ON PROGRESS IN PHYSICS, 2006, 69 (01) :233-299

[9] D4c: A very high precision diffractometer for disordered materials [J].

Fischer, HE ;

Cuello, GJ ;

Palleau, P ;

Feltin, D ;

Barnes, AC ;

Badyal, YS ;

Simonson, JM .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2002, 74 (Suppl 1) :S160-S162

[10] NEUTRON-SCATTERING LENGTHS - A SURVEY OF EXPERIMENTAL-DATA AND METHODS [J].

KOESTER, L ;

RAUCH, H ;

SEYMANN, E .

ATOMIC DATA AND NUCLEAR DATA TABLES, 1991, 49 (01) :65-120

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