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Publisher: AIP   (Total: 27 journals)   [Sort by number of followers]

Showing 1 - 27 of 27 Journals sorted alphabetically
Acoustics Today     Hybrid Journal   (Followers: 8)
AIP Advances     Open Access   (Followers: 10, SJR: 0.472, CiteScore: 1)
AIP Conference Proceedings     Full-text available via subscription   (Followers: 4)
American J. of Physics     Full-text available via subscription   (Followers: 54, SJR: 0.456, CiteScore: 1)
APL Bioengineering     Open Access  
APL Materials     Open Access   (Followers: 14, SJR: 1.63, CiteScore: 4)
APL Photonics     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 40, SJR: 1.382, CiteScore: 3)
Applied Physics Reviews     Hybrid Journal   (Followers: 9, SJR: 4.156, CiteScore: 12)
Biointerphases     Open Access   (Followers: 1, SJR: 0.558, CiteScore: 2)
Biomicrofluidics     Open Access   (Followers: 5, SJR: 0.592, CiteScore: 2)
Chaos : An Interdisciplinary J. of Nonlinear Science     Hybrid Journal   (Followers: 3, SJR: 0.716, CiteScore: 2)
Chinese J. of Chemical Physics     Hybrid Journal   (Followers: 1, SJR: 0.24, CiteScore: 1)
J. of Applied Physics     Hybrid Journal   (Followers: 79, SJR: 0.739, CiteScore: 2)
J. of Chemical Physics     Hybrid Journal   (Followers: 36, SJR: 1.252, CiteScore: 2)
J. of Laser Applications     Full-text available via subscription   (Followers: 13, SJR: 0.741, CiteScore: 2)
J. of Mathematical Physics     Hybrid Journal   (Followers: 23, SJR: 0.644, CiteScore: 1)
J. of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 3, SJR: 1.046, CiteScore: 3)
J. of Renewable and Sustainable Energy     Hybrid Journal   (Followers: 13, SJR: 0.44, CiteScore: 1)
Low Temperature Physics     Hybrid Journal   (Followers: 6, SJR: 0.264, CiteScore: 1)
Physics of Fluids     Hybrid Journal   (Followers: 38, SJR: 1.19, CiteScore: 3)
Physics of Plasmas     Hybrid Journal   (Followers: 8, SJR: 0.576, CiteScore: 1)
Physics Today     Hybrid Journal   (Followers: 82, SJR: 0.66, CiteScore: 1)
Review of Scientific Instruments     Hybrid Journal   (Followers: 20, SJR: 0.585, CiteScore: 1)
Scilight     Full-text available via subscription  
Structural Dynamics     Open Access   (Followers: 7, SJR: 1.625, CiteScore: 4)
Surface Science Spectra     Hybrid Journal   (Followers: 1, SJR: 0.416, CiteScore: 1)
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Low Temperature Physics
Journal Prestige (SJR): 0.264
Citation Impact (citeScore): 1
Number of Followers: 6  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1063-777X - ISSN (Online) 1090-6517
Published by AIP Homepage  [27 journals]
  • Influence of environment and association with water, to internal structure
           of trifluoroacetylacetone. Matrix isolation FTIR study
    • Authors: Rasa Platakyte, Alejandro Gutiérrez-Quintanilla, Valdas Sablinskas, Justinas Ceponkus
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 615-626, June 2019.
      The structure of trifluoroacetylacetone in argon and nitrogen matrices and association with water molecules were studied by the means of Fourier transform infrared absorption spectroscopy (FTIR) aided with density functional theory (DFT) calculations. The absorption bands of trifluoroacetylacetone isolated in argon can be attributed to the single conformer 1,1,1-trifluoro-4-hydroxy-3-penten-2-one [AcAcF3(CO)] which is in good agreement with previous studies. Absorption bands of trifluoroacetylacetone isolated in nitrogen matrix cannot be explained by the presence of only one conformer and with the aid of DFT calculations both conformers 1,1,1-trifluoro-4-hydroxy-3-penten-2-one and 5,5,5-trifluoro-4-hydroxy-3-penten-2-one [AcAcF3(OH)] are confirmed to coexist in the nitrogen matrix. Addition of water to the trifluoroacetylacetone–matrix mixture resulted in appearance of new spectral bands not belonging either to trifluoroacetylacetone or water monomers confirming the formation of trifluoroacetylacetone–water complexes. The most abundant isomer out of trifluoroacetylacetone–water complexes was found to be the one formed from 5,5,5-trifluoro-4-hydroxy-3-penten-2-one and water attached to its C=O group in both matrices, the other one isomer of 1,1,1-trifluoro-4-hydroxy-3-penten-2-one–water complex is also observed in smaller amounts.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:39Z
      DOI: 10.1063/1.5103254
       
  • VUV Photolysis of CH4–H2O mixture in methane-rich ices: Formation of
           large complex organic molecules in astronomical environments
    • Authors: Lahouari Krim, Mindaugas Jonusas
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 606-614, June 2019.
      The present work aims to highlight the influence of water molecules in the photo-decomposition of methane ice and reveal the photoproducts formed in solid phase upon VUV irradiation of CH4–H2O mixture in methane-rich ices. The analysis of our IR spectra shows that even with very low concentrations of water in methane ices, several oxygenated hydrocarbons are formed as photoproducts derived from the photodecomposition of water and methane at cryogenic temperatures. We show that both alka[e]nes and oxygen bearing organics are efficiently formed at temperatures as low as 3 K. However, while the IR signatures of the alka[e]nes such as C2H6, C2H4 and C2H2 dominate the IR spectra of the irradiated CH4–H2O ices at temperatures lower than 50 K, the heating of the sample to 110 K reveals the formation of large carbon chain complex organic molecules such as ethanol, pronanol, propanal and glycolaldehyde.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:38Z
      DOI: 10.1063/1.5103253
       
  • Propyne-water complexes hosted in helium droplets
    • Authors: A. Gutiérrez-Quintanilla, M. Briant, E. Mengesha, Marc-André Gaveau, J.-M. Mestdagh, B. Soep, L. Poisson
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 634-638, June 2019.
      A HElium Nanodroplet Isolation (HENDI) experiment was performed to explore the absorption spectrum of the propyne-water complex [math]. Two spectral regions were investigated, near the CH stretch v1 of the propyne moiety and near the asymmetric stretch v3 of the water moiety. Ab-initio calculations were performed at the MP2/aug-cc-pVTZ level to estimate the spectroscopic constants of the free complex. This provided the necessary parameters to simulate the absorption spectrum of the complex and thus facilitate the interpretation of the experiment. The observed spectrum is consistent with a structure of the complex where two H-bonds between water and propyne form a five member ring. The later was predicted by Lopes et al. [J. Mol. Struct. 834, 258 (2007)].
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:37Z
      DOI: 10.1063/1.5103256
       
  • Effect of argon environment on small water clusters in matrix isolation
    • Authors: A. Vasylieva, I. Doroshenko, O. Doroshenko, V. Pogorelov
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 627-633, June 2019.
      The influence of cryogenic argon environment on small water clusters was investigated by quantum-chemical simulation of structure and vibrational spectra of water clusters consisting of different numbers of molecules. Comparison of calculation results for vacuum and argon environment shows a red shift of spectral bands in argon. Obtained IR frequencies and intensities for water clusters in argon are compared with experimentally registered FTIR spectra of water trapped in a low-temperature argon matrix.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:35Z
      DOI: 10.1063/1.5103255
       
  • Valine infrared absorbance at cryogenic temperatures
    • Authors: C. A. P. da Costa, E. F. da Silveira
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 649-655, June 2019.
      The amino acid L-valine is analyzed by Fourier Transform InfraRed Spectroscopy (FTIR) in the 40–300 K temperature range. A valine sample was deposited onto a ZnSe substrate, cooled down to 40 K and warmed up back to 300 K, annealed at 120°C for 12 h, cooled down to 40 K and warmed up again to 300 K. FTIR spectra were acquired in transmission mode during this thermal excursion. It was observed that: (i) no phase transition has occurred; (ii) as temperature decreases, the band absorbances increase linearly and the band widths become narrower; (iii) compared to 300 K values, the integrate absorbances (peak areas) at 40 K are 40–100% higher and bandwidths are about half; (iv) the FTIR spectrum behaviors of the annealed and non-annealed samples are similar. The sample is considered to be constituted only by valine zwitterions; bandwidth decrease is explained partially by Doppler effect; absorbance enhancement at low temperatures is caused by stronger Van der Walls forces. These general conclusions are expected to be similar for other amino acids.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:34Z
      DOI: 10.1063/1.5103258
       
  • Chloroform–nitrogen aggregates: Upshifted CH and downshifted CCl
           stretching vibrations observed by matrix isolation and jet expansion
           infrared spectroscopy
    • Authors: S. Oswald, S. Coussan
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 639-648, June 2019.
      Aggregates of chloroform with nitrogen are studied by broad band Fourier transform infrared spectroscopy in neon, argon and nitrogen cryomatrices as well as supersonic jet expansions. The CH stretching vibration v1 shows spectral blue-shifting upon switching from isolated gas phase conditions to bulk nitrogen matrices, which can be reconstructed incrementally by stepwise cluster formation with an increasing amount of N2 both in supersonic expansions and neon or argon matrices. Vice versa, the CCl stretching vibration ν5 is incrementally downshifted. A small CH stretching upshift is observed in the chloroform homodimer as well.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:32Z
      DOI: 10.1063/1.5103257
       
  • Fluorescence studies of porphycene in various cryogenic environments
    • Authors: Michał Gil, Alexandr Gorski, Alexander Starukhin, Jacek Waluk
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 656-662, June 2019.
      Low temperature fluorescence of porphycene, a structural isomer of porphyrin, has been studied using polymer samples, matrix isolation, and fluorescence line narrowing (FLN) techniques. Contrary to the case of the chromophore embedded in a nitrogen matrix, the emission from polymer samples at temperatures above 10 K exhibits strong dependence on the wavelength of excitation: increasing the excitation energy leads to gradual broadening and, finally, loss of vibrational structure. A rather unusual observation is the similarity of the structured fluorescence spectra obtained for excitations into S1 and S2 states. This finding indicates a correlation between the site distributions in S1 and S2. A similar idea has been put forward earlier for tetraphenylporphyrin [I. Lee, G. J. Small, and J. M. Hayes, J. Phys. Chem. 94, 3376 (1990)]. We propose that the correlation is due to isotropic polarizability in the molecular plane; calculations confirm such hypothesis. For porphycene, an additional factor that can contribute to the effect is a rapid trans-trans tautomerization that leads to the rotation of x and y in-plane axes of the molecule. FLN spectra reveal significant band broadening for excitation into S2. This suggests that the site correlation is not of 1:1 type or that at 4.2 K the site exchange dynamics is frozen in comparison with the situation at higher temperatures.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:31Z
      DOI: 10.1063/1.5103259
       
  • Ion radiation in icy space environments: Synthesis and radioresistance of
           complex organic molecules
    • Authors: Prudence C. J. Ada Bibang, Aditya N. Agnihotri, Basile Augé, Philippe Boduch, Charles Desfrançois, Alicja Domaracka, Frédéric Lecomte, Bruno Manil, Rafael Martinez, Gabriel S. V. Muniz, Nicolas Nieuwjaer, Hermann Rothard
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 590-597, June 2019.
      Ices are omnipresent in cold regions in space on, e.g., comets, dust grains, transneptunian objects, surfaces of planets and their satellites. The dominant molecule in such ices is water, but also other small molecules or even complex organic molecules (COMs) may be present. Ionizing radiation (UV photons, electrons, ions from cosmic rays or solar wind) induces several physico-chemical processes such as radiolysis. The fragmentation of initial molecules followed by chemical reactions between radicals may lead to formation of new molecules. Furthermore, also implanted projectiles can contribute to chemistry by forming new molecular species. Other observed effects include structural changes (compaction, amorphization) and desorption (sputtering) of particles from the surface. At CIMAP (Caen, France), using the different beam lines of the GANIL facility, and at GSI (Darmstadt, Germany), the interaction of swift highly charged heavy ions with astrophysical ices has been studied in a wide projectile energy range from keV to GeV. Here, two examples of our studies on astrophysical and astrochemical applications will be discussed in detail: 1) the synthesis of COMs under irradiation of ices made of small molecules, and 2) radiosensitivity of COMs such as pyridine, glycine and adenine, both for isolated molecules in the gas phase and in condensed phase. Special emphasis is given on pyridine and pyridine in water matrix.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:29Z
      DOI: 10.1063/1.5103250
       
  • New possible route of HC3N formation in Titan’s atmosphere
    • Authors: J. Mouzay, C. Assadourian, N. Piétri, T. Chiavassa, I. Couturier-Tamburelli
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 598-605, June 2019.
      The structures of the C2N2/C2H2 complex in solid argon matrices have been investigated using FTIR spectroscopy and ab initio calculations, at the aug-cc-pVTZ level of theory. Predicted frequency shifts for the linear structure, characterized by a strong hydrogen bond between the nitrogen of C2N2 and the acetylenic proton were found in good agreement with the ones from the experiment. The photodissociation of C2N2–C2H2 complex trapped in argon matrix at 10 K has been performed at 120 nm. The FTIR measurement and ab initio calculations pointed to the formation of HC3N, HCN and probably HC2NC and HNC as final reactional products. This mechanism route is potentially important for chemical models of the Titan’s atmosphere.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:14Z
      DOI: 10.1063/1.5103251
       
  • Nanostructures and impurity centers in cryogenic environment
    • Authors: C. Crépin-Gilbert, E. Savchenko
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 581-582, June 2019.

      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:12Z
      DOI: 10.1063/1.5103243
       
  • Carbon chain extension processes in cryogenic environments: UV-assisted
           growth of polyynic nitriles in solidified rare gases
    • Authors: Robert Kołos
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 583-589, June 2019.
      As demonstrated in recent years, polyynic nitriles may photochemically arise from smaller unsaturated chain species in an apparently rigid environment of a cryogenic rare gas matrix. Here I summarize the highlights of respective research that has advanced the spectroscopic description of R–(C≡C)n–C≡N molecules (R = H, CN or CH3).
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:11Z
      DOI: 10.1063/1.5103249
       
  • Hydrogen atom catalyzed ortho-to-para conversion in solid molecular
           hydrogen
    • Authors: A. I. Strom, K. L. Fillmore, D. T. Anderson
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 676-688, June 2019.
      Infrared spectroscopy is used to investigate the process of molecular hydrogen ortho-to-para (o/p) conversion in solid hydrogen samples doped with small concentrations (10–50 ppm) of hydrogen atoms (H-atoms) as an impurity. The H-atoms are generated using the in situ 193 nm photolysis of N2O dopant molecules. For hydrogen crystals with relatively low initial ortho-H2 fractions (Xo ≤ 0.03), the o/p conversion kinetics at temperatures of 1.8 and 4.0 K follow kinetic equations developed previously for H-atom catalyzed o/p conversion. The measured atom catalyzed o/p conversion kinetics indicates the H-atoms are mobile under these conditions in agreement with previous ESR measurements. It has been proposed that the H-atoms diffuse by a quantum tunneling mechanism that is described as chemical diffusion. Detailed fits of the measured o/p conversion kinetic data allow the initial H-atom concentration after photolysis to be extracted assuming literature values for the H-atom recombination rate constant (H + H → H2). The measured o/p conversion kinetics show the observed o/p conversion is much less than expected based on the previously measured H-atom recombination rate constant and thus suggest that the H-atoms do not diffuse randomly through the crystal but rather diffuse preferentially in regions of high para-hydrogen content. The estimated H-atom concentrations from this study are consistent with previous ESR measurements but in conflict with kinetic studies of H-atom reactions with various dopants such as N2O.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:07Z
      DOI: 10.1063/1.5103261
       
  • Trapping mechanism and sites of H and D atoms in solid Ne
    • Authors: Yu. A. Dmitriev, N. P. Benetis
      Abstract: Low Temperature Physics, Volume 45, Issue 6, Page 663-675, June 2019.
      The shifts of the isotropic Fermi contact hyperfine interactions (FCHFI) of hydrogen or deuterium atoms isolated in crystalline noble gases at cryogenic temperatures are compared to the values of the same quantities of the hydrogen atom in the gas phase. New experimental FCHFI values of H/D trapped in crystalline Ne are compared with experimentally obtained and theoretically computed values. The possible trapping sites in the distorted solid Ne gas crystalline structure occupied by the hydrogen atomic impurities are identified by the variation of the FCHFI shifts in the EPR spectra and discussed after their dependence to the deposition method. The present EPR investigation revealed formation of H2 microcrystals in solid Ne even at a very low H2 impurity content of 0.01% in the deposited H2:Ne gaseous mixture.
      Citation: Low Temperature Physics
      PubDate: 2019-06-05T06:26:03Z
      DOI: 10.1063/1.5103260
       
 
 
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