Articles with "gamma gamma" as a keyword



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Interference phenomenon on the complex degree of coherence

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Published in 2019 at "Optical Review"

DOI: 10.1007/s10043-019-00542-2

Abstract: A two-beam interferometer (TBI) with a two-mode fiber (TMF) as a dispersive medium in one arm and air in the other provides evidence of interference related to the complex degree of coherence $$\gamma $$. A… read more here.

Keywords: interference; gamma gamma; complex degree; degree coherence ... See more keywords
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Gamma–gamma coincidence in neutron activation analysis

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Published in 2018 at "Journal of Radioanalytical and Nuclear Chemistry"

DOI: 10.1007/s10967-018-6033-8

Abstract: Neutron activation analysis is a useful analytical technique for the determination of many nuclides. However, the resulting gamma-ray spectra frequently have overlapping photopeaks, necessitating complicated peak de-convolution techniques to perform an accurate measurement. This work… read more here.

Keywords: activation analysis; neutron activation; gamma coincidence; coincidence ... See more keywords
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A comparative theoretical and experimental study on liquid-liquid equilibria of membrane forming polymeric solutions

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Published in 2017 at "Fluid Phase Equilibria"

DOI: 10.1016/j.fluid.2016.12.005

Abstract: Abstract The phase equilibria of two ternary system of Polyethersulfone (PES) - n-methyl pyrolidine (NMP) – distilled Tap water (H2O) and Polysulfone (PSf) – NMP - H2O has been investigated critically using both theoretical and… read more here.

Keywords: theoretical experimental; rktcc; gamma gamma; approach ... See more keywords
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The development of a digital gamma-gamma coincidence/anticoincidence spectrometer and its applications to monitor low-level atmospheric 22Na/7Be activity ratios in Resolute Bay, Canada.

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Published in 2018 at "Journal of environmental radioactivity"

DOI: 10.1016/j.jenvrad.2018.07.022

Abstract: Using a previously developed digital gamma-gamma coincidence/anticoincidence spectrometer, daily aerosol samples collected at Resolute Bay, Canada (74.71°N, 94.97°W) from May 2016 to April 2017 were analysed for activity concentrations of 22Na and 7Be. The spectrometer… read more here.

Keywords: 22na 7be; gamma coincidence; gamma gamma; gamma ... See more keywords
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New scaling laws for self-avoiding walks: bridges and worms

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Published in 2019 at "Journal of Statistical Mechanics: Theory and Experiment"

DOI: 10.1088/1742-5468/ab4584

Abstract: We show how the theory of the critical behaviour of $d$-dimensional polymer networks gives a scaling relation for self-avoiding {\em bridges} that relates the critical exponent for bridges $\gamma_b$ to that of terminally-attached self-avoiding arches,… read more here.

Keywords: laws self; new scaling; self avoiding; scaling laws ... See more keywords
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Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data

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Published in 2017 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stx1791

Abstract: In this work, by using strong gravitational lensing (SGL) observations along with Type Ia Supernovae (Union2.1) and gamma ray burst data (GRBs), we propose a new method to study a possible redshift evolution of $\gamma(z)$,… read more here.

Keywords: strong gravitational; evolution; mass density; gamma gamma ... See more keywords
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Unit Equations on Quaternions

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Published in 2020 at "Quarterly Journal of Mathematics"

DOI: 10.1093/qmath/haaa043

Abstract: A classical result about unit equations says that if $\Gamma_1$ and $\Gamma_2$ are finitely generated subgroups of $\mathbb C^\times$, then the equation $x+y=1$ has only finitely many solutions with $x\in\Gamma_1$ and $y\in \Gamma_2$. We study… read more here.

Keywords: unit equations; gamma; gamma gamma; equations quaternions ... See more keywords
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Deformed band structures in neutron-rich Pm152–158 isotopes

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Published in 2018 at "Physical Review C"

DOI: 10.1103/physrevc.98.044316

Abstract: High spin band structures of neutron-rich $^{152-158}$Pm isotopes have been obtained from the measurement of prompt $\gamma$-rays of isotopically identified fragments produced in fission of $^{238}$U+$^{9}$Be and detected using the VAMOS++ magnetic spectrometer and EXOGAM… read more here.

Keywords: neutron rich; structures neutron; band structures; gamma gamma ... See more keywords
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Spacelike and timelike form factors for the $(\pi^0,\eta,\eta')\to\gamma^*\gamma$ transitions in the light-front quark model

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Published in 2017 at "Physical Review D"

DOI: 10.1103/physrevd.96.056008

Abstract: We investigate the $(\pi^0,\eta,\eta')\to\gamma^*\gamma$ transitions both for the spacelike region and the timelike region using the light-front quark model (LFQM). In particular, we present the new direct method to explore the timelike region without resorting… read more here.

Keywords: eta eta; gamma gamma; eta gamma; gamma ... See more keywords
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Cluster-Void Degeneracy Breaking: Modified Gravity in the Balance

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Published in 2018 at "Physical Review D"

DOI: 10.1103/physrevd.97.103504

Abstract: Combining galaxy cluster and void abundances is a novel, powerful way to constrain deviations from General Relativity and the $\Lambda$CDM model. For a flat $w$CDM model with growth of large-scale structure parameterized by the redshift-dependent… read more here.

Keywords: void degeneracy; degeneracy breaking; gamma gamma; cluster ... See more keywords
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Performance Analysis of IMC in FSO Systems Over Gamma–Gamma Channel

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Published in 2018 at "IEEE Photonics Journal"

DOI: 10.1109/jphot.2018.2842716

Abstract: Free-space optical communication (FSO) offers high security and high bandwidth, which is why it is widely used in digital communication systems. However, atmospheric turbulence or scintillation induces a voluminous degradation to the signal. So, different… read more here.

Keywords: gamma channel; gamma gamma; performance; fso systems ... See more keywords