Systematics of magnetic dipole strength in the stable even-mass Mo isotopes

Journal Article · Sat Apr 15 04:00:00 EDT 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.044308· OSTI ID:20771434

Rusev, G ^[1]; Schwengner, R; Doenau, F; Erhard, M; Grosse, E; Junghans, A R; Kaeubler, L; Kosev, K; Mallion, S; Schilling, K D; Wagner, A ^[1]; Frauendorf, S ^[1]; Kostov, L K ^[2]; Garrel, H von; Kneissl, U; Kohstall, C; Kreutz, M; Pitz, H H; Scheck, M; Stedile, F ^[3]

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1. Institut fuer Kern- und Hadronenphysik, Forschungszentrum Rossendorf, D-01314 Dresden (Germany)
2. Institute for Nuclear Research and Nuclear Energy, BAS, BG-1784 Sofia (Bulgaria)
3. Institut fuer Strahlenphysik, Universitaet Stuttgart, D-70569 Stuttgart (Germany)

The nuclides {sup 92}Mo, {sup 98}Mo, and {sup 100}Mo have been studied in photon-scattering experiments by using bremsstrahlung produced at an electron energy of 6 MeV at the ELBE accelerator of the Forschungszentrum Rossendorf and at electron energies from 3.2 to 3.8 MeV at the Dynamitron accelerator at the University of Stuttgart. Six dipole transitions in {sup 98}Mo and 19 in {sup 100}Mo were observed for the first time in the energy range from 2 to 4 MeV. The experimental results are compared with predictions of the shell model and with predictions of the quasiparticle random-phase approximation (QRPA) in a deformed basis. The latter show significant contributions of isovector-orbital and isovector-spin vibrations. The change of the magnetic dipole strength in the isotopic chain of the even-mass isotopes from {sup 92}Mo to {sup 100}Mo is discussed. The calculations within the QRPA are extrapolated to the particle-separation energies to estimate the possible influence of M1 strength on the stability of the nuclides against photodissociation in cosmic scenarios.

• OSTI ID: 20771434
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
BREMSSTRAHLUNG
ELECTRONS
ISOVECTORS
MAGNETIC DIPOLES
MEV RANGE
MOLYBDENUM 100
MOLYBDENUM 92
MOLYBDENUM 98
PHOTONS
PHOTONUCLEAR REACTIONS
RANDOM PHASE APPROXIMATION
SCATTERING
SHELL MODELS
SPIN