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Rotational bands in the proton emitter (141)Ho
D Seweryniak1, P J Woods, J J Ressler
1Argonne National Laboratory, Illinois 60439, USA.
Physical Review Letters
|April 6, 2001
Summary
Researchers observed rotational bands in the proton emitter Holmium-141, providing direct evidence of its deformed shape. This study reveals key details about its nuclear structure and deformation parameters.
Area of Science:
- Nuclear Physics
- Atomic Physics
- Quantum Mechanics
Background:
- Proton emitters are crucial for understanding nuclear structure.
- (141)Ho is a proton-emitting nucleus whose detailed properties are not fully characterized.
- Nuclear deformation influences various nuclear properties and decay modes.
Purpose of the Study:
- To investigate the nuclear structure of Holmium-141 ((141)Ho).
- To provide direct evidence for the deformation of (141)Ho.
- To determine the ground state and isomeric state configurations and deformations.
Main Methods:
- Utilized the recoil-decay tagging method to observe rotational bands.
- Analyzed band crossings and signature splittings.
- Performed particle-rotor calculations for comparison.
Main Results:
- Observed rotational bands feeding the ground and isomeric states in (141)Ho.
- Directly confirmed that (141)Ho is a deformed nucleus.
- Deduced a quadrupole deformation of beta(2) = 0.25(4) for the ground state.
- Proposed 7/2(-)[523] and 1/2(+)[411] configurations for the ground and isomeric states, respectively.
- Indicated potential significant hexadecapole deformation and triaxiality in the ground state.
Conclusions:
- The study provides direct evidence for the deformation of (141)Ho.
- The determined deformation parameters and proposed configurations offer insights into the nuclear structure.
- Further theoretical investigation is suggested regarding hexadecapole deformation and triaxiality in (141)Ho.