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Emission Spectra02:39

Emission Spectra

When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Flame Photometry: Overview01:02

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...

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Video Experimental Relacionado

Updated: May 25, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
06:28

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Published on: January 30, 2020

La emisión periódica de la binaria de rayos gamma 1FGL J1018.6-5856 es el resultado de las observaciones realizadas.

Fermi LAT Collaboration1, M Ackermann, M Ajello

  • 1W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305, USA.

Science (New York, N.Y.)
|January 17, 2012
PubMed
Resumen

Los astrónomos descubrieron un raro binario de rayos gamma, 1FGL J1018.6-5856, utilizando el Telescopio de Gran Área Fermi (LAT). Este sistema este sistema este sistema.

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Área de la Ciencia:

  • La astrofísica es la astrofísica.
  • Astrofísica de altas energías de alta energía.
  • Sistemas de estrellas binarias sistemas de estrellas binarias.

Sus antecedentes:

  • Las binarias de rayos gamma son raras, a pesar de las predicciones de docenas en nuestra galaxia.
  • Su emisión se origina en las interacciones entre objetos compactos (estrellas de neutrones o agujeros negros) y sus compañeros.

Objetivo del estudio:

  • Para identificar y caracterizar las nuevas binarias de rayos gamma.
  • Para investigar la naturaleza del objeto celeste 1FGL J1018.6-5856.

Principales métodos:

  • Utilizó datos del Telescopio de Gran Área Fermi (LAT) para observaciones de rayos gamma.
  • Identificó y analizó las contrapartes variables de rayos X, ópticas y de radio.

Principales resultados:

  • 1FGL J1018.6-5856 exhibe una modulación periódica en la intensidad y el espectro de rayos gamma con un período de 16,6 días.
  • Una contraparte variable de rayos X alcanzó su pico simultáneamente con la emisión de rayos gamma.
  • Se identificaron una estrella O6V y una contraparte de radio modulada.

Conclusiones:

  • 1FGL J1018.6-5856 es confirmado como un binario de rayos gamma.
  • La detección de este sistema implica la existencia de otras binarias de rayos gamma más débiles en la Vía Láctea.