X-ray monochromator system for use with synchrotron radiation sources

Golovchenko, Jene Andrew; Levesque, R. A.; Cowan, P. L.

doi:10.1063/1.1136631

Cited by 116 publications

(33 citation statements)

References 1 publication

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“…The system that we have developed is different from the "classical" two-crystal systems [3]. The dispersive elements (mirror 1 and mirror 2 in Figure 1) are plane crystals or plane multilayer interferential mirrors (MIM) working according to the Bragg diffraction.…”

Section: The Monochromatormentioning

confidence: 99%

MONOX: a characterization tool for the X-UV range

André

Avila

Barchewitz

et al. 2005

Eur. Phys. J. Appl. Phys.

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Section: The Monochromatormentioning

confidence: 99%

MONOX: a characterization tool for the X-UV range

André

Avila

Barchewitz

et al. 2005

Eur. Phys. J. Appl. Phys.

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“…The double-crystal monochromators designed and manufactured for synchrotron X-ray diffraction experiments meet this requirement (see e.g. Golovchenko et al, 1981;Matsushita et al, 1986). On the other hand, a method has been proposed by which a radiation beam having a band of wavelengths is produced (Arndt et al, 1982).…”

Section: How To Measure the Intensity Gradient Of Bragg Re¯ectionsmentioning

confidence: 99%

Wavelength-modulated diffraction: a new method for phase determination

Iwasaki¹,

Yurugi²,

Yoshimura³

1999

Acta Cryst Sect A

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A new diffraction method has been developed in which the intensity of Bragg re¯ections is measured while changing continually the wavelength of the radiation over a range in the vicinity of the absorption edge of an atom contained in the crystal. It is shown that the intensity gradient with respect to the wavelength of the hkl re¯ection is in a simple relation to the real and imaginary parts of the structure factor of that re¯ection and, if the positions of the anomalously scattering atoms are known or properly assumed, the phase of F(hkl) can be derived by solving simultaneous linear equations. The procedure is particularly simple when the crystal is centrosymmetric. The method, called the wavelengthmodulated diffraction (WMD) method, is free from the problem of intensity scaling encountered in other methods of phase determination. Synchrotron radiation is most suited to WMD measurements. Suggestions on how to measure the intensity gradient are given and the possible errors involved are discussed.

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“…The application of XAS to metalloproteins has grown in frequency and sophistication with subsequent advances in monochromator (7)(8)(9)(10) and detector design (11)(12)(13)(14)(15), and in the theory used to analyze the data (16)(17)(18)(19)(20)(21)(22)(23). The technique itself has been reviewed extensively (6,(24)(25)(26), along with the strategies associated with data collection (27).…”

mentioning

confidence: 99%

X-Ray Absorption Spectroscopy of Dinuclear Metallohydrolases

Tierney

Schenk

2014

Biophysical Journal

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In this mini-review, we briefly discuss the physical origin of x-ray absorption spectroscopy (XAS) before illustrating its application using dinuclear metallohydrolases as exemplary systems. The systems we have selected for illustrative purposes present a challenging problem for XAS, one that is ideal to demonstrate the potential of this methodology for structure/function studies of metalloenzymes in general. When the metal ion is redox active, XAS provides a sensitive measure of oxidation-state-dependent differences. When the metal ion is zinc, XAS is the only spectroscopic method that will provide easily accessible structural information in solution. In the case of heterodimetallic sites, XAS has the unique ability to interrogate each metal site independently in the same sample. One of the strongest advantages of XAS is its ability to examine metal ion site structures with crystallographic precision, without the need for a crystal. This is key for studying flexible metal ion sites, such as those described in the selected examples, because it allows one to monitor structural changes that occur during substrate turnover.

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X-ray monochromator system for use with synchrotron radiation sources

Cited by 116 publications

References 1 publication

MONOX: a characterization tool for the X-UV range

MONOX: a characterization tool for the X-UV range

Wavelength-modulated diffraction: a new method for phase determination

X-Ray Absorption Spectroscopy of Dinuclear Metallohydrolases

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