Shell structure of collective states in /sup 56/Fe, /sup 58/Fe, and /sup 60/Fe

Journal Article · Wed Aug 01 00:00:00 EDT 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.20.830· OSTI ID:6125553

McGrory, J B; Raman, S

Conventional shell-model calculations of the iron isotopes with A = 56--60 are discussed. The calculated level spectra are in good agreement with experiment. The calculations of E2 observables are in reasonable agreement with experiment when added effective charges of 1.0e are used for both neutrons and protons. The neutron effective charge is significantly different from one appropriate (1.9e) for /sup 56/Ni. There is a strong state dependence in the effective M1 operator, and calculations of M1 observables are in general disagreement with experiment. An analysis of the structure of ground-state bands and yrast levels is made in terms of a simple rotational model. In all even isotopes, the intrinsic quadrupole moments in the ground-state ''band'' shrink dramatically with increasing J. There is evidence of a band crossing in all three even isotopes, but no evidence is found for an abrupt shape change in the ground-state bands of these nuclei. It is concluded that no simple rotational model gives a good description of the low-lying states of the iron isotopes.

• Research Organization: Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 6125553
• Journal Information: Phys. Rev., C; (United States), Vol. 20:2
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
IRON 56
E2-TRANSITIONS
ENERGY LEVELS
M1-TRANSITIONS
IRON 57
IRON 58
IRON 59
IRON 60
BRANCHING RATIO
EIGENVALUES
HAMILTONIANS
MATRIX ELEMENTS
NUCLEAR STRUCTURE
PROTON-PROTON INTERACTIONS
QUADRUPOLE MOMENTS
ROTATIONAL STATES
SHELL MODELS
SPECTROSCOPIC FACTORS
YRAST STATES
BARYON-BARYON INTERACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITED STATES
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PROTON-NUCLEON INTERACTIONS
QUANTUM OPERATORS
RADIOISOTOPES
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES
651513* - Nuclear Properties & Reactions
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651613 - Nuclear Properties & Reactions
A=59-89
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