関連する実験動画

Updated: Jul 12, 2026

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
07:52

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer

Published on: April 12, 2017

非破壊的なガンマ線スペクトロメトリーによる月面サンプルにおける宇宙的および原始的な放射性核酸

R W Perkins, L A Rancitelli, J A Cooper

    Science (New York, N.Y.)
    |January 30, 1970
    PubMed
    まとめ

    この研究では,月面のサンプルのコスモジェニック放射性核酸を測定し,太陽陽子による明確な濃度を見つけました. トリウムとウランの比率は,地球と月の材料の共通の核合成を示唆しています.

    さらに関連する動画

    Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research09:41

    Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research

    Published on: August 2, 2021

    Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides08:43

    Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides

    Published on: May 20, 2019

    関連する概念動画

    Radioactive Decay and Radiometric Dating02:48

    Radioactive Decay and Radiometric Dating

    Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
    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...
    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...
    Types of Radioactivity03:23

    Types of Radioactivity

    The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture.
    Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
    Isotopes and Radioisotopes01:28

    Isotopes and Radioisotopes

    In the early 1900s, English chemist Frederick Soddy realized that an element could have atoms with different masses that were chemically indistinguishable. These different types are called isotopes — atoms of the same element that differ in mass. Isotopes differ in mass because they have different numbers of neutrons but are chemically identical because they have the same number of protons. Soddy was awarded the Nobel Prize in Chemistry in 1921 for this discovery.
    An isotope containing more...
    Photoluminescence: Applications01:14

    Photoluminescence: Applications

    Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...