scholarly journals Photodissociation dynamics of CH3I probed via multiphoton ionisation photoelectron spectroscopy

2019 ◽  
Vol 21 (21) ◽  
pp. 11142-11149 ◽  
Author(s):  
Emily M. Warne ◽  
Briony Downes-Ward ◽  
Joanne Woodhouse ◽  
Michael A. Parkes ◽  
Darren Bellshaw ◽  
...  
Keyword(s):  
Absorption Band ◽  
Photoelectron Spectroscopy ◽  
Energy Region ◽  
Complex Dynamics ◽  
High Energy ◽  
High Energy Region

Femtosecond photoelectron spectroscopy measurements of dissociation CH3I show complex dynamics in the high energy region of absorption band A.

scholarly journals Analysis of Shielding Performance of Radiation-Shielding Materials According to Particle Size and Clustering Effects

2021 ◽  
Vol 11 (9) ◽  
pp. 4010
Author(s):  
Seon-Chil Kim
Keyword(s):  
Particle Size ◽  
Polymer Material ◽  
Energy Region ◽  
High Energy ◽  
Radiation Shielding ◽  
High Energy Region ◽  
Particle Structure ◽  
Effect Of Particle Size ◽  
Extensive Body ◽  
Shielding Material

In the field of medical radiation shielding, there is an extensive body of research on process technologies for ecofriendly shielding materials that could replace lead. In particular, the particle size and arrangement of the shielding material when blended with a polymer material affect shielding performance. In this study, we observed how the particle size of the shielding material affects shielding performance. Performance and particle structure were observed for every shielding sheet, which were fabricated by mixing microparticles and nanoparticles with a polymer material using the same process. We observed that the smaller the particle size was, the higher both the clustering and shielding effects in the high-energy region. Thus, shielding performance can be improved. In the low-dose region, the effect of particle size on shielding performance was insignificant. Moreover, the shielding sheet in which nanoparticles and microsized particles were mixed showed similar performance to that of the shielding sheet containing only microsized particles. Findings indicate that, when fabricating a shielding sheet using a polymer material, the smaller the particles in the high-energy region are, the better the shielding performance is. However, in the low-energy region, the effect of the particles is insignificant.

scholarly journals π--PInteraction in High Energy Region

1957 ◽  
Vol 18 (3) ◽  
pp. 264-268 ◽  
Author(s):  
Daisuke Ito ◽  
Tetsuro Kobayashi ◽  
Miwae Yamazaki ◽  
Shigeo Minami
Keyword(s):  
Energy Region ◽  
High Energy ◽  
High Energy Region

3.3.6.4 The high-energy region

2005 ◽  
pp. 306-309
Author(s):  
A. Fasso ◽  
K. Göbel ◽  
M. Höfert ◽  
J. Ranft ◽  
G. Stevenson
Keyword(s):  
Energy Region ◽  
High Energy ◽  
High Energy Region

Charge transfer in collisions of atomic hydrogen withN7+ions in the high-energy region

1987 ◽  
Vol 36 (4) ◽  
pp. 1656-1662 ◽  
Author(s):  
G. C. Saha ◽  
Shyamal Datta ◽  
S. C. Mukherjee
Keyword(s):  
Charge Transfer ◽  
Atomic Hydrogen ◽  
Energy Region ◽  
High Energy ◽  
High Energy Region

scholarly journals Preparation and Photocatalytic Property of Ag Modified Titanium Dioxide Exposed High Energy Crystal Plane (001)

Coatings ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 27 ◽  
Author(s):  
Li-Yuan Zhang ◽  
Jia You ◽  
Qian-Wen Li ◽  
Zhi-Hong Dong ◽  
Ya-Jie Zhong ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Absorption Band ◽  
Photoelectron Spectroscopy ◽  
Ph Value ◽  
Photocatalytic Property ◽  
High Energy ◽  
Metal Halide ◽  
Crystal Plane ◽  
X Ray ◽  
Metal Halide Lamp

TiO2 exposed high energy crystal plane (001) was prepared by the sol-gel process using butyl titanate as the titanium source and hydrofluoric acid as the surface control agent. Ag-TiO2 was prepared by depositing Ag on the crystal plane of TiO2 (101) with a metal halide lamp. The surface morphology, interplanar spacing, crystal phase composition, ultraviolet absorption band, element composition, and valence state of the samples were characterized by using field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD), ultraviolet-visible absorption spectrum (UV-Vis-Abs), and X-ray photoelectron spectroscopy (XPS), respectively. The formation mechanism of high energy crystal plane (001) was discussed, and the photocatalytic activities were evaluated by following degradation of methyl orange. The results show that TiO2 exposed the (001) crystal plane with a ratio of 41.8%, and Ag can be uniformly deposited on the crystal plane of TiO2 (101) by means of metal halide lamp deposition. Under the same conditions, the degradation rate of methyl orange by deposited Ag-TiO2 reaches as much as 93.63% after 60 min using the metal halide lamp (300 W) as an illuminant, 81.89% by non-deposited samples and 75.20% by nano-TiO2, causing a certain blue shift in the light absorption band edge of TiO2. Ag-TiO2 has the best photocatalytic performance at a pH value of 2.

An empirical derivation of the X-ray optic transmission profile used in calibrating the Planetary Instrument for X-ray Lithochemistry (PIXL) for Mars 2020

2018 ◽  
Vol 33 (2) ◽  
pp. 162-165 ◽  
Author(s):  
C. M. Heirwegh ◽  
W. T. Elam ◽  
D. T. Flannery ◽  
A. C. Allwood
Keyword(s):  
Energy Region ◽  
High Energy ◽  
Conventional Approach ◽  
Smoothing Algorithm ◽  
Correction Factors ◽  
High Energy Region ◽  
X Ray ◽  
Straightforward Method ◽  
Specific Correction ◽  
Energy Portion

Calibration of the prototype Planetary Instrument for X-ray Lithochemistry (PIXL) selected for Mars 2020 has commenced with an empirical derivation of the X-ray optic transmission profile. Through a straightforward method of dividing a measured “blank” spectrum over one calculated assuming no optic influence, a rudimentary profile was formed. A simple boxcar-smoothing algorithm was implemented to approximate the complete profile that was incorporated into PIQUANT. Use of this form of smoothing differs from the more conventional approach of using a parameter-based function to complete the profile. Comparison of element-specific correction factors, taken from a measurement of NIST SRM 610, was used to assess the accuracy of the new profile. Improvement in the low- to mid-energy portion of the data was apparent though the high-energy region diverged from unity, and thus, requires further refinement.

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