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Fig. 4

Fig. 3(Color online) Crystal structure of antiferromagnet FeBO3.

168  úËõ May 2012 Vol.25 No.3

(Color online) Synchrotron radiation 57Fe­M äossbauer spec­
troscopy using nuclear Bragg monochromator. (a) Basicprinciple of measurement. (b) Conceptual diagram of theenergy scan process and the measured SR 57Fe­M äossbauer
spectra: the upper graph is absorption spectrum of 10­mm­
57Fe[95÷] foil and the Lower one is conversion electron
spectrum of 25­mm­57Fe[95÷] foil.

ðà ¡ GlM[ÌæÌúËõXoEA[ªõTable 1

Nuclear monochromator for 14.4 keV

Type: Pure Nuclear Bragg Reection 57FeBO3 (111) held at justbefore N áeel temperature.
Beam size: 0.3 mm (V)~1.6 mm (H)Energy resolution: 15.4 neV

Total ux

: 2.0~104 counts/sec(H): 4.0(V)~16.0
: p [or s]

Angular divergence
PolarizationlM[ð EgÉ(1{(v/c) cos uB) ÅÏ¦ÈªçVO
Cj¤ÂUüðèÊuÉoËÅ«é9,22_24)B±±ÅCjubO½Ë³êé g üÌÎõóÔÍ»Ì¥»ûüÉË¶·éÌÅCá¦ÎCFig. 4(a)É¦·lÉUÊÉ¼ÉOêðóÁ·êÎCs ÎõÌúËõ©ç p ÎõÌXo
EA[ g üð­¶Å«éB±ÌõwnÅ¿ð 57FeBO3
»ÌOãÌ½ê©ÌÊuiFig. 4(a)Ì A Í BjÉzuµCg üñÜÌ­xð¬xÌÖÆµÄªè·êÎCX
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3.2(Color online) Conceptual diagram of the energy domain
SR­Mossbauer spectroscopy. (a) Principle of detection
method. (b) SR­Mossbauer spectrum of 73Ge nuclei in asample of Li2GeO.

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Fig. 6(Color online) (a) Sketch of DAC and a typical sample
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Fig. 7(Color online) (a) SR 57Fe­M äossbauer spectra of dhcp­FeH.

Here, solid lines correspond to tting curves. Two dashedlines correspond to the spectral components of Fe 2a and Fe
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mm/s É 2 ¿Ì EuH2 ÉÎµ½zûs[NªÏª³êÄÄÏ»·é33) B±Ì½ßCFeH Ì­¥«ÅÍf»É¢éB±êÉÎµCEuHx _IV i14.3 GPajÌXyNgº¤ÌÏc£ÅSÌ 3d ohª·­ÈèCtF~GÅÍs[NÌÊuª{0.72 mm/s tßÜÅå«­VtlM[ÊuÌdqóÔ§x D(Ef) ªÁµÄ­¥«­g·éªÏª³ê½B±Ì±Æ©çCÁ³Åfð§»ÌXg[i[ðiID(Ef)1jª½³êéBêûC

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Fig. 8

(Color online) (a) Experimental setup. (b) High­pressure
151Eu­M äossbauer spectra and structure models of EuH ­I
x(Pnma) and EuHx­IV (I4/mmm). The solid lines are ts ofthe experimental data.
Fig. 9ÅéªÀØ³êCSÄÌóyÞ§xf»¨ª 3¿ÌÊS§û\¢ðÆéÆ¢¤êÊ¥ªm§³ê½B¡
ãCeÊf»ÊÉæéà®Ì¿§äÌÂ\«ðTéÅCfzÞ¿âVï¥«Þ¿ÌÝvwjª¾çêéàÌÆúÒ³êéB

(Color online) (a) Experimental setup. (b) Principal struc­ture of the prepared Cr/Fe lms and (c), (d) Mossbauer
spectra without external magnetic eld: the distance between
the Cr/Fe interface and the 57Fe probe layer is (c) d2.0
nm, (d) d0.0 nm. (e) M äossbauer spectrum for the Cr/Felm of d0.0 nm with external eld (hp//Hex). The solidline corresponds to the tting of the spectrum. The dashedlines represent subspectra related to the dierent hyperneelds near the Cr/Fe interface. (f) Step sites model of the
Cr/Fe­interface.

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Energy domain synchrotron radiation
M äossbauer spectroscopy
Takaya MITSUI

Japan Atomic Energy Agency,
1_1_1 Kouto, Sayo­cho, Sayo­gun, Hyogo 679_
5148, Japan

Makoto SETO

Research Reactor Institute, Kyoto University,
2_1010 Asashironishi, Kumatori­cho, Sennan­gun, Osaka 590_0494, Japan

Abstract

Energy­domain synchrotron radiation M äossbauer spectroscopy (SRMS) has been realized by thecomplementary use of a nuclear Bragg reection from 57FeBO3 single crystal and a reference scat­ter containing the resonant M äossbauer nuclide. The former can lter the high­brilliant 57Fe g­raysfrom SR at any bunch­mode, and the latter enables the SRMS absorption studies for almost all
M äossbauer nuclides. The excellent features of SR (small beam cross section, extremely small
divergence and high degree of polarization) open the new SRMS applications. In this article, we
explain the outline of energy domain SRMS and its applications, which include the ultrahigh­pres­sure studies, grazing incidence experiment and ultrahigh resolution X­ray inelastic scattering.

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