Determination of the Low-Energy Region of the Tritium Beta Spectrum

1959 ◽  
Vol 116 (6) ◽  
pp. 1544-1547 ◽  
Author(s):  
D. C. Conway ◽  
W. H. Johnston
Keyword(s):  
Energy Region ◽  
Low Energy ◽  
Beta Spectrum

Raman and FTIR Spectroscopy of Synthetic Amphiboles: I. The OH Librational Bands and the Determination of the OH-F Content of Richterites via Raman Spectroscopy

2020 ◽  
Author(s):  
Giancarlo Della Ventura ◽  
Frank C. Hawthorne ◽  
Boriana Mihailova ◽  
Armida Sodo
Keyword(s):  
Raman Spectroscopy ◽  
Ftir Spectroscopy ◽  
Raman Spectra ◽  
Energy Region ◽  
Low Energy ◽  
Reliable Estimation ◽  
A Site ◽  
Combination Bands ◽  
Two Peaks

Abstract Unpolarized FTIR and Raman spectra were collected in the regions 4000–4600 cm–1 (NIR) and 100–4000 cm–1 from previously synthesized and characterized amphiboles in the systems richterite–fluoro-richterite, potassic-richterite–potassic-fluoro-richterite, rubidium-richterite–rubidium-fluoro-richterite, and potassic-richterite–deuterated potassic-richterite. The NIR spectra of Na-, K-, and Rb-richterites have peaks at 4325, 4210 cm–1, and 3735–3730 cm–1. All three peaks decrease in intensity with increasing F content, indicating that the higher-energy peaks are combination bands involving the principal OH-stretch at 3735–3730 cm–1 and two OH-libration modes, the frequencies of which can be calculated from the relation ωcombination ≈ ωOH + ωlibration; these are 590 and 475 cm–1, respectively. The FTIR spectra of the richterite–fluoro-richterite and potassic-richterite–potassic-fluoro-richterite series show decreasing intensity and eventual disappearance of the band at ∼600 cm–1 with increasing F in accord with the assignment of this band as due to OH-libration. Raman spectra of the potassic-richterite–deuterated potassic-richterite amphiboles in the low-energy region show the disappearance of two peaks at 585 and 473 cm–1 that we have assigned to OH-libration modes. Collectively, these spectroscopic results indicate that there are two OH-libration modes at ∼590 and ∼475 cm–1 in these synthetic richterites and, by implication, in all monoclinic OH-bearing amphiboles with filled A sites. Similarly to FTIR, the relative intensities of the stretching modes associated with OH-A-OH and OH-A-F local configurations in the Raman spectra provide a reliable estimation of the F content in these A site-filled amphiboles.

Uncertainties on the determination of K∩ sigma-term due to K∩ unphysical and low-energy region

1979 ◽  
Vol 26 (17) ◽  
pp. 555-561 ◽  
Author(s):  
B. Di Claudio ◽  
G. Violini ◽  
A. M. Rodeíguez-Vargas
Keyword(s):  
Energy Region ◽  
Low Energy ◽  
Sigma Term

Determination of denudation rates by the measurement of meteoric 10Be in Guadiana river sediment samples (Spain) by low-energy AMS

2018 ◽  
Vol 189 ◽  
pp. 227-235 ◽  
Author(s):  
S. Padilla ◽  
J.M. López-Gutiérrez ◽  
D.M.R. Sampath ◽  
T. Boski ◽  
J.M. Nieto ◽  
...  
Keyword(s):  
River Sediment ◽  
Low Energy ◽  
Sediment Samples ◽  
Denudation Rates

Comment on ‘The screening effect of D–D fusion in Sm in sub-low energy region (≤20 keV)’

2008 ◽  
Vol 35 (6) ◽  
pp. 068001
Author(s):  
T S Wang ◽  
Z Yang ◽  
H Yunemura ◽  
A Nakagawa ◽  
H Y Lv ◽  
...  
Keyword(s):  
Energy Region ◽  
Low Energy ◽  
Screening Effect

scholarly journals Determination of low energy (>160 keV) X-ray spectra and verification of transport calculations through silicon

1997 ◽  
Vol 44 (6) ◽  
pp. 2065-2070 ◽  
Author(s):  
J.R. Turinetti ◽  
K.L. Critchfield ◽  
J.R. Chavez ◽  
W.T. Kemp ◽  
R.D. Bellem ◽  
...  
Keyword(s):  
Low Energy ◽  
X Ray
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