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Spectral structure of the pygmy dipole resonance

Tonchev, A P ; Hammond, S L ; Kelley, J H ; Kwan, E ; Lenske, H ; Rusev, G ; Tornow, W ; Tsoneva, N

Physical review letters, 2010-02, Vol.104 (7), p.072501-072501, Article 072501 [Periódico revisado por pares]

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Título:
Spectral structure of the pygmy dipole resonance
Autor: Tonchev, A P ; Hammond, S L ; Kelley, J H ; Kwan, E ; Lenske, H ; Rusev, G ; Tornow, W ; Tsoneva, N
Assuntos: ALKALINE EARTH ISOTOPES ; BARIUM 138 ; BARIUM ISOTOPES ; BEAMS ; BINDING ENERGY ; DIPOLES ; ELECTRIC DIPOLES ; ENERGY ; ENERGY RANGE ; ENERGY-LEVEL TRANSITIONS ; EVEN-EVEN NUCLEI ; EXCITATION ; FINE STRUCTURE ; INTERMEDIATE MASS NUCLEI ; ISOMERIC TRANSITION ISOTOPES ; ISOTOPES ; M1-TRANSITIONS ; MEV RANGE ; MULTIPOLE TRANSITIONS ; MULTIPOLES ; NANOSECONDS LIVING RADIOISOTOPES ; NEUTRON SEPARATION ENERGY ; NUCLEAR PHYSICS AND RADIATION PHYSICS ; NUCLEI ; PHOTON BEAMS ; RADIOISOTOPES ; RESONANCE ; SENSITIVITY ANALYSIS ; SPIN FLIP ; STABLE ISOTOPES
É parte de: Physical review letters, 2010-02, Vol.104 (7), p.072501-072501, Article 072501
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: High-sensitivity studies of E1 and M1 transitions observed in the reaction 138Ba(gamma,gamma{'}) at energies below the one-neutron separation energy have been performed using the nearly monoenergetic and 100% linearly polarized photon beams of the HIgammaS facility. The electric dipole character of the so-called "pygmy" dipole resonance was experimentally verified for excitations from 4.0 to 8.6 MeV. The fine structure of the M1 "spin-flip" mode was observed for the first time in N=82 nuclei.
Editor: United States
Idioma: Inglês

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