Related Experiment Video
Updated: Jul 11, 2026
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Nuclear forward scattering for high energy mössbauer transitions
I Sergueev1, A I Chumakov, T H Deschaux Beaume-Dang
1European Synchrotron Radiation Facility, BP220, F-38043 Grenoble, France. sergueev@esrf.fr
Physical Review Letters
|October 13, 2007
Summary
Researchers explored nuclear forward scattering for 61Ni using synchrotron radiation. This method simplifies analyzing high-energy nuclear resonances, even with thick samples and short lifetimes.
Area of Science:
- Nuclear Physics
- Materials Science
Background:
- High-energy nuclear resonances present challenges for analysis.
- Synchrotron radiation offers unique opportunities for nuclear spectroscopy.
Purpose of the Study:
- To investigate nuclear forward scattering of synchrotron radiation for the 67.41 keV resonance of 61Ni.
- To develop a method applicable to other high-energy Mössbauer transitions.
Main Methods:
- Utilized synchrotron radiation.
- Employed a silicon crystal monochromator with low-index reflections.
- Used a multielement detector.
Main Results:
- Successfully studied nuclear forward scattering for 61Ni.
- Demonstrated a universal time-scaling dependence for nuclear decay under specific conditions.
- Showcased the applicability of the method to thick samples and short nuclear lifetimes.
Conclusions:
- The developed approach is effective for high-energy nuclear resonance studies.
- This technique imposes no restrictions on sample environment.
- The method simplifies analysis by incorporating thickness effects and hyperfine interactions via time scaling.
Related Concept Videos
01:06Nuclear Overhauser Enhancement (NOE)
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
01:05Atomic Nuclei: Magnetic Resonance
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
01:14Atomic Nuclei: Nuclear Spin State Population Distribution
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
01:23Atomic Nuclei: Nuclear Relaxation Processes
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis. This...
00:59Atomic Nuclei: Nuclear Magnetic Moment
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
01:03Atomic Nuclei: Nuclear Spin State Overview
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...