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Signature of a possible α-cluster state in N=Z doubly-magic 56Ni.
- Source :
- European Physical Journal A -- Hadrons & Nuclei; Nov2020, Vol. 56 Issue 11, p1-8, 8p
- Publication Year :
- 2020
-
Abstract
- An inelastic α -scattering experiment on the unstable N = Z , doubly-magic 56 Ni nucleus was performed in inverse kinematics at an incident energy of 50 A.MeV at GANIL. High multiplicity for α -particle emission was observed within the limited phase-space of the experimental setup. This observation cannot be explained by means of the statistical-decay model. The ideal classical gas model at kT = 0.4 MeV reproduces fairly well the experimental momentum distribution and the observed multiplicity of α particles corresponds to an excitation energy around 96 MeV. The method of distributed m α -decay ensembles is in agreement with the experimental results if we assume that the α -gas state in 56 Ni exists at around 113 - 17 + 15 MeV. These results suggest that there may exist an exotic state consisting of many α particles at the excitation energy of 113 - 17 + 15 MeV. [ABSTRACT FROM AUTHOR]
- Subjects :
- IDEAL gases
MULTIPLICITY of nuclear particles
KINEMATICS
MULTIPLICITY (Mathematics)
Subjects
Details
- Language :
- English
- ISSN :
- 14346001
- Volume :
- 56
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- European Physical Journal A -- Hadrons & Nuclei
- Publication Type :
- Academic Journal
- Accession number :
- 147686765
- Full Text :
- https://doi.org/10.1140/epja/s10050-020-00294-7