Direct neutron decay of the isoscalar giant dipole resonance

Journal Article · Wed Aug 15 00:00:00 EDT 2007 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778807080145· OSTI ID:21075747

Hunyadi, M; Berg, A M. van den; Davids, B; Harakeh, M N; Huu, M A. de; Woertche, H J ^[1]; Csatlos, M; Gulyas, J; Krasznahorkay, A; Sohler, D ^[2]; Garg, U ^[3]; Fujiwara, M ^[4]; Blasi, N ^[5]

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1. University of Groningen, Kernfysisch Versneller Instituut (Netherlands)
2. Institute of Nuclear Research of the Hungarian Academy of Sciences (Debrecen) (Hungary)
3. University of Notre Dame (United States)
4. Osaka University, Research Center for Nuclear Physics (Japan)
5. INFN (Italy)

The direct and statistical neutron decay of the isoscalar giant dipole resonance has been studied in {sup 90}Zr, {sup 116}Sn, and {sup 208}Pb using the ({alpha}, {alpha}' n) reaction at a bombarding energy of 200 MeV. The spectra of fast decay neutrons populating valence hole states of the Z, N - 1 nuclei were analyzed, and estimates for the branching ratios were determined. The observation of the nucleon-direct-decay channels helped to select giant-resonance strengths and suppress the underlying background and continuum, which led to an indication of the existence of a new mode with L 2 character, presumably the overtone of the isoscalar giant quadrupole resonance.

• OSTI ID: 21075747
• Journal Information: Physics of Atomic Nuclei, Vol. 70, Issue 8; Other Information: DOI: 10.1134/S1063778807080145; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
BRANCHING RATIO
DIPOLES
FAST NEUTRONS
GIANT RESONANCE
HOLES
LEAD 208
MEV RANGE 100-1000
NEUTRONS
NUCLEAR DECAY
QUADRUPOLES
SPECTRA
TIN 116
VALENCE
ZIRCONIUM 90