DISCLAIMER: This article is being kept online for historical purposes. Though accurate at last review, it is no longer being updated. The page may contain broken links or outdated information.
Evolution of nuclear structure in erbium-158
Wang, Xiaofeng Department of Physics, Florida State University, Tallahassee, Florida.
Riley, Mark A. Department of Physics, Florida State University, Tallahassee, Florida.
Simpson, John Science and Technology Facilities Council, Daresbury Laboratory, Daresbury, Warrington, United Kingdom.
Paul, Edward S. Department of Physics, University of Liverpool, Liverpool, United Kingdom.
- Nuclear structure physics and gamma-ray spectroscopy
- Level structures up to band termination
- Level structures beyond band termination
- Related Primary Literature
- Additional Reading
The response of atomic nuclei to increasing angular momentum (or spin) and excitation energy is one of the most fundamental topics of nuclear structure research and is often studied through high-resolution gamma-ray spectroscopy. Erbium-158 (158Er) is widely considered as a classic nucleus in this field since it exhibits a number of beautiful structural changes as it evolves with increasing excitation energy and angular momentum. At low spin it behaves like a weakly deformed prolate quantum rotor, similar to many other rare-earth nuclei. With increasing angular momentum, it undergoes Coriolis-induced alignments of high-j neutron or proton pairs until a dramatic prolate collective to oblate noncollective transition eventually takes place via the mechanism of band termination. At the highest spins, a spectacular return to collective rotation is observed, and it has been suggested that this is in the form of triaxial strongly deformed structures. This latter suggestion is based on a comparison of energies, spins, and transition quadrupole moments between experiment and theory. This observation confirms the longstanding prediction that such heavy nuclei will possess nonaxial shapes on their path toward fission.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information