A X-band ESR Apparatus Using a Whispering Gallery Mode Dielectric Resonator

被引：7

作者：

Colligiani, A. ^{[1
]}

Guillon, P. ^{[2
]}

Longo, I. ^{[3
]}

Martinelli, M. ^{[4
]}

Pardi, L. ^{[4
]}

机构：

[1] Univ Messina, Dipartimento Chim Ind, Messina, Italy

[2] Univ Limoges, Inst Rech Commun Opt & Microondes, Limoges, France

[3] CNR, Ist Fis Atom & Mol, I-56127 Pisa, Italy

[4] Univ Pisa, Dipartimento Fis, I-56100 Pisa, Italy

来源：

APPLIED MAGNETIC RESONANCE | 1992年 / 3卷 / 05期

关键词：

D O I：

10.1007/BF03260114

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The behaviour of a disc-shaped dielectric resonator (DR) working in the Whispering-Gallery Modes (WGM) when used for X-band ESR experiments has been tested. It has been verified that the WGM in the resonator can be excited by using the microwave bridge of a Bruker spectrometer. The microwave field is well confined in the DR also in the absence of metal shieldings as demonstrated by the high Q values of the detected resonances. A large number of such resonances has been detected from eight up to twelve gigahertz making the DR a very broadband device. ESR spectra of various powder and aqueous samples have been obtained and compared with those of the same samples recorded by using a metal cavity. The relative amplitude of the spectra demonstrated that for aqueous samples the sensitivity of DR is similar to that of the metallic cavity. Further investigations are in progress to enhance the overall performance.

引用

页码：827 / 840

页数：14

共 24 条

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