Results 151 to 160 of about 1,251,014 (199)

Quantitative micro-PIXE mapping of squid statoliths

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
Distribution of elements in statoliths of squid Loligo vulgaris reynaudii d'Orbigny, 1845 was studied, using the true elemental imaging system (Dynamic Analysis) of the NAC nuclear microprobe. The analysis revealed various patterns of Ca and Sr distributions.
M.R. Lipinski, W.J. Przybylowicz, M.D. Durholtz, J. Mesjasz-Przybylowicz   +3 more
openaire   +3 more sources

Micro-PIXE in Earth Science

1997
Abstract A quarter-century ago, Johansson et al. (1970) demonstrated qualitative multi-element analysis using Si(Li) detectors and a combination of (1) X-ray excitation by accelerator-derived, MeV-energy proton beams and (2) energy-dispersive X-ray spectroscopy.
J. L. Campbell, G. K Czamanske
openaire   +1 more source

Accuracy of thick-target micro-PIXE analysis

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1990
Abstract The accuracy attainable in micro-PIXE analysis is assessed in terms of the X-ray production model and its assumptions, physical realities of the specimen, the necessary data base, and techniques of standardization. NTIS reference materials are analyzed to provide the experimental tests of accuracy.
J.L. Campbell, W.J. Teesdale, J.-X. Wang
openaire   +1 more source

IN-AIR MICRO-PIXE ANALYSIS OF TISSUE SAMPLES

International Journal of PIXE, 2002
Micro-PIXE is capable of providing spatial distributions of elements in the micro-meter scale and its application to biology is useful to elucidate the cellular metabolism. Since, in this method, a sample target is usually irradiated with proton or α-particle beams in vacuum, beam heating results in evaporation of volatile elements and shrinking of ...
A. Tanaka, K. Ishii, Y. Komori, S. Matsuyama, H. Yamazaki, Y. Oishi, M. Rodriguez, Ts. Amartaivan, K. Kubota, H. Fukuda, T. Kamiya, T. Satoh, T. Sakai, M. Oikawa, K. Arakawa, M. Saidoh   +15 more
openaire   +1 more source

Quantitative elemental analysis of rat bone using micro-PIXE analysis

Nuclear Instruments & Methods in Physics Research B
Hydroxyapatite (Ca5(PO4)3(OH)) is the main component of the bone, and the molar ratio of calcium and phosphorus (Ca/P) reflects the growth and health status of the bone.
Shino Takeda, Yugo Kato, Haruko Yakumaru
exaly   +2 more sources

Micro-PIXE study of gold archaeological objects

Journal of Radioanalytical and Nuclear Chemistry, 2003
Several fragments of ancient gold objects coming from an Eneolithic hoard and from Pietroasa ‘Closca cu Puii de Aur’ (‘The Golden Brood Hen with Its Chickens’) hoard, unearthed on Romanian territory, and two Romanian native gold nuggets samples were analyzed using micro-PIXE technique. The purpose of the study was to clarify the metal provenance. Trace
Bugoi, R., Cojocaru, V., Constantinescu, B., Constantin, D., Grambole, D., Herrmann, F.   +5 more
openaire   +2 more sources

Calibration of micro-PIXE analysis of sulfide minerals

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1987
Abstract Two different standardization methods have been used in micro-PIXE analysis of several hundred sulfide mineral specimens. Their advantages and disadvantages are discussed and the compatibility of the two sets of results is investigated.
J.L. Campbell, L.J. Cabri, P.S.Z. Rogers, K. Traxel, T.M. Benjamin   +4 more
openaire   +1 more source

MICRO-PIXE RECONNAISSANCE OF ALLANITE AS A PRASEODYMIUM SOURCE

International Journal of PIXE, 1996
Praseodymium is one of the most important pigment materials for high-quality china and ceramics but its source minerals are not well known to geologists. Allanite, one of the REE-bearing minerals in nature, has a large coordination polyhedra for cations and favors the larger LREE ions such as praseodymium than other REE-bearing minerals that favor the
SATOSHI MURAO, KAZUO NAKASHIMA, SOEY H SIE   +2 more
openaire   +1 more source

MICRO-PIXE APPLICATION TO THE SPHALERITE-GALENA GEOTHERMOMETER

International Journal of PIXE, 1997
We have applied the micro-PIXE technique to determining the cadmium content in sphalerite ( ZnS ) and galena ( PbS ) for use in geothermometry in the Bulawan gold-silver telluride deposit, Philippines. This geothermometry is based on the temperature control on the cadmium distribution between sphalerite and galena.
SATOSHI MURAO, VICTOR B. MAGLAMBAYAN, SOEY H. SIE   +2 more
openaire   +1 more source

Application of micro-PIXE method to ore geology

AIP Conference Proceedings, 1999
Specific examples of ore mineral analysis by micro-PIXE are presented in this paper. For mineralogical usage it is essential to construct a specimen chamber which is designed exclusively for mineral analysis. In most of the analysis of natural minerals, selection of absorbers is essential in order to obtain optimum results.
S. Murao, S. H. Sie, S. Hamasaki, V. B. Maglambayan, X. Hu   +4 more
openaire   +1 more source