Spin-aligned neutron-proton pair mode in atomic nuclei

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.021301· OSTI ID:21596631

Qi, C; Blomqvist, J; Baeck, T; Cederwall, B; Johnson, A; Liotta, R J; Wyss, R ^[1]

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1. Department of Physics, Royal Institute of Technology, SE-10691 Stockholm (Sweden)

Shell-model calculations using realistic interactions reveal that the ground and low-lying yrast states of the N=Z nucleus {sub 46}{sup 92}Pd are mainly built upon isoscalar neutron-proton pairs, each carrying the maximum angular momentum J=9 allowed by the shell 0g{sub 9/2}, which is dominant in this nuclear region. This structure is different from that found in the ground and low-lying yrast states of all other even-even nuclei studied so far. The low-lying spectrum of excited states generated by such correlated neutron-proton pairs has two distinctive features: (i) the levels are almost equidistant at low energies and (ii) the transition probability I{yields}I-2 is approximately constant and strongly selective. This unique mode is shown to replace normal isovector pairing as the dominant coupling scheme in N=Z nuclei approaching the doubly magic nucleus {sup 100}Sn.

• OSTI ID: 21596631
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 2; Other Information: DOI: 10.1103/PhysRevC.84.021301; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COUPLING
EXCITED STATES
INTERACTIONS
ISOVECTORS
MAGIC NUCLEI
NEUTRONS
PALLADIUM 92
PROTONS
SHELL MODELS
SPECTRA
SPIN
TIN 100
YRAST STATES
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
NUCLEONS
PALLADIUM ISOTOPES
PARTICLE PROPERTIES
RADIOISOTOPES
TENSORS
TIN ISOTOPES
VECTORS