Electron capture {beta} decay of {sup 7}Be encapsulated in C{sub 60}: Origin of increased electron density at the {sup 7}Be nucleus
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie gory, Moscow, 119991 (Russian Federation)
We offer a new theoretical interpretation for the effect of enhanced electron density at the {sup 7}Be nucleus encapsulated in fullerene C{sub 60}. Our ab initio Hartree-Fock calculations show that the electron density at the {sup 7}Be nucleus in {sup 7}Be-C{sub 60} increases due to the attractive effective potential well generated by the fullerene. The 2s state in the isolated Be atom turns into a 3s state in the joint potential. This new state has higher energy and slightly larger amplitude at the Be nucleus than the previous 2s state. Moreover the 3s wave function has an additional node that appeared at a distance rapprox =5a{sub B} from the center. The node imitates repulsion between the Be electron and the fullerene wall because the electron has zero probability to occupy this region. Such an imitation of the repulsion by means of the node in an attractive potential has a direct physical analogy in the theory of {alpha}-{alpha} and N-N nuclear interactions.
- OSTI ID:
- 21386613
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevC.81.024610; (c) 2010 The American Physical Society; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AMPLITUDES
BERYLLIUM 7
BETA DECAY
ELECTRON CAPTURE
ELECTRON DENSITY
ELECTRONS
FULLERENES
HARTREE-FOCK METHOD
INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
S STATES
SIMULATION
WAVE FUNCTIONS
ALKALINE EARTH ISOTOPES
APPROXIMATIONS
BARYON-BARYON INTERACTIONS
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
CALCULATION METHODS
CAPTURE
CARBON
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
EVEN-ODD NUCLEI
FERMIONS
FUNCTIONS
HADRON-HADRON INTERACTIONS
ISOTOPES
LEPTONS
LIGHT NUCLEI
NONMETALS
NUCLEAR DECAY
NUCLEI
PARTICLE INTERACTIONS
RADIOISOTOPES