title: A signal-to-noise standard for pulsed EPR.
abstract: A 2 mm diameter by 10mm long cylinder of fused SiO2 (quartz) gamma-irradiated to 1 kGy with 60Co contains about 2x10(16) spins/cm3. It is proposed as a standard for monitoring signal-to-noise (S/N) performance of X-band pulsed EPR spectrometers. This sample yields S/N of about 25 on modern spin echo spectrometers, which permits measurement of both signal and noise under the same conditions with an 8-bit digitizer.
authors.affiliation: Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA. geaton@du.edu
authors.forename: Gareth R
authors.initials: GR
authors.lastname: Eaton
authors.forename: Sandra S
authors.initials: SS
authors.lastname: Eaton
authors.forename: Richard W
authors.initials: RW
authors.lastname: Quine
authors.forename: Deborah
authors.initials: D
authors.lastname: Mitchell
authors.forename: Velavan
authors.initials: V
authors.lastname: Kathirvelu
authors.forename: Ralph T
authors.initials: RT
authors.lastname: Weber
mesh_terms: D000465:Algorithms; D003627:Data Interpretation, Statistical; D004578:Electron Spin Resonance Spectroscopy / Q000592:standards* / Q000706:statistics & numerical data*; D008872:Microwaves; D011791:Quartz / Q000737:chemistry; D011827:Radiation
chemical_list: D011791:Quartz
references.citation: J Magn Reson. 1999 Sep;140(1):69-83
references.pmid: 10479550
references.citation: J Magn Reson. 1999 Sep;140(1):218-27
references.pmid: 10479565
references.citation: Appl Radiat Isot. 2008 Sep;66(9):1240-4
references.pmid: 18353657
references.citation: Rev Sci Instrum. 2019 Feb;90(2):024102
references.pmid: 30831717