chanelink logo
CHANELINK
Türkçe

Accurate measurement of neptunium ionization potential using new laser technology

334
2024-05-11 16:42:14
Çeviriyi gör

Neptunium is the main radioactive component of nuclear waste, with a complex atomic structure that can be explored through mass spectrometry. This analysis is crucial for understanding its inherent characteristics and determining the isotopic composition of neptunium waste. Magdalena Kaja and her team from Johannes Gutenberg University in Mainz, Germany have developed a novel laser spectroscopy technique that can more accurately measure the ionization potential of neptunium compared to previous methods.

Neptunium is an actinide metal in the periodic table adjacent to uranium, with an atomic number of 93. The inspiration for its name comes from Neptune, located outside of Uranus in the solar system, which is a recognition of its position. Among the 25 known isotopes, most have extremely short lifetimes. However, the most stable isotope, neptunium 237 (237 Np), has a half-life of over 2 million years, making it a particularly dangerous nuclear pollutant.

The neptunium isotope samples available for this type of analysis are very small: they typically only contain a few atoms of the isotope.


Magdalena Kaja and her colleagues utilized a cutting-edge device that includes solid-state titanium: sapphire laser systems, enhanced laser ion sources, and high transmittance mass separators. This advanced equipment has played an important role in their research on neptunium.

The research team used this technique to measure the first ionization energy of neptunium, which is the energy required to remove the first electron from the outermost electron shell to form a positive ion. They accurately determined the value to be 6.265608 (19) eV. This measurement is not only consistent with the values previously reported in scientific literature, but also achieves an accuracy level more than ten times higher than any previous measurement.

This method can also be applied to the analysis and detection of trace amounts of neptunium in radioactive waste.

Source: Laser Net

İlgili öneriler

  • Renishao provides customized laser ruler solutions for ASML

    Renishao collaborated with ASML to meet a range of strict manufacturing and performance requirements and developed a differential interferometer system for providing direct position feedback in metrology applications. Customized encoder solutions can achieve step wise improvements in speed and throughput.Modern semiconductor technology relies on precise control of various processes used in integra...

    2023-12-14
    Çeviriyi gör

  • ZLDS100, a British high frequency laser displacement sensor, monitors multipoint vibration of silencers

    A muffler is a key component of a car's exhaust system, designed to reduce noise levels and emissions. The vibration of a muffler can have a significant impact on its performance and life. In order to understand the performance and behavior of the muffler, it is necessary to make multi-point vibration measurement. First, it enables engineers to assess the structural integrity and durability of a m...

    2023-08-04
    Çeviriyi gör

  • Graphene terahertz absorber and graded plasma metamaterials

    Optical metamaterials are an effective way to utilize their superior photon capture capabilities. Therefore, perfect absorbers can be achieved through nanoscale resonant plasmas and metamaterial structures.Metamaterial perfect absorbers (MPAs) are typically composed of periodic subwavelength metals (such as plasma superabsorbers) or dielectric resonance units. Compared with static passive physical...

    2024-05-20
    Çeviriyi gör

  • New LiDAR can 'see' faces from hundreds of meters away

    At a distance of 325 meters, the human eye may only be able to distinguish between a person's head and body, making it difficult to discern any other differences. But a research team including Heriot Watt University in the UK and Massachusetts Institute of Technology in the US has developed a new type of LiDAR scanner that can perform detailed analysis of a person's face from such a distance and c...

    02-11
    Çeviriyi gör

  • Shanghai Institute of Optics and Mechanics proposes a new scheme of Er doped silicate fiber as an extended L-band broadband amplifier

    Recently, Hu Lili, a research group of the Advanced Laser and Optoelectronic Functional Materials Department of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, proposed a new scheme based on field strength optimization of Er doped silicate fiber as an extended L-band broadband amplifier. Relevant research achievements were published in Optics Letters under the tit...

    2024-06-05
    Çeviriyi gör