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Pygmy dipole strength in 86Kr and systematics of N=50 isotones

Publication ,  Journal Article
Schwengner, R; Massarczyk, R; Rusev, G; Tsoneva, N; Bemmerer, D; Beyer, R; Hannaske, R; Junghans, AR; Kelley, JH; Kwan, E; Lenske, H; Marta, M ...
Published in: Physical Review C - Nuclear Physics
February 8, 2013

The dipole strength of the N=50 nucleus 86Kr was studied in photon-scattering experiments using bremsstrahlung produced with electron beams of energies of 7.9 and 11.2 MeV delivered by the linear accelerator ELBE as well as using quasimonoenergetic and linearly polarized γ rays of 10 energies within the range from 4.7 to 9.3 MeV delivered by the HIγS facility. A high-pressure gas target was used. We identified 39 levels up to an excitation energy of 10.1 MeV. Simulations of γ-ray cascades were performed to estimate intensities of inelastic transitions and to correct the intensities of the ground-state transitions for their branching ratios. The photoabsorption cross section derived in this way up to the neutron-separation energy is combined with the photoabsorption cross section obtained from a (γ,n) experiment at HIγS. The enhanced E1 strength found in the range from 6 to 10 MeV is compared with the ones in the N = 50 isotones 88Sr, 90Zr, and 92Mo and with predictions of calculations within the quasiparticle-phonon model. © 2013 American Physical Society.

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Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

February 8, 2013

Volume

87

Issue

2

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

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Schwengner, R., Massarczyk, R., Rusev, G., Tsoneva, N., Bemmerer, D., Beyer, R., … Wagner, A. (2013). Pygmy dipole strength in 86Kr and systematics of N=50 isotones. Physical Review C - Nuclear Physics, 87(2). https://doi.org/10.1103/PhysRevC.87.024306
Schwengner, R., R. Massarczyk, G. Rusev, N. Tsoneva, D. Bemmerer, R. Beyer, R. Hannaske, et al. “Pygmy dipole strength in 86Kr and systematics of N=50 isotones.” Physical Review C - Nuclear Physics 87, no. 2 (February 8, 2013). https://doi.org/10.1103/PhysRevC.87.024306.
Schwengner R, Massarczyk R, Rusev G, Tsoneva N, Bemmerer D, Beyer R, et al. Pygmy dipole strength in 86Kr and systematics of N=50 isotones. Physical Review C - Nuclear Physics. 2013 Feb 8;87(2).
Schwengner, R., et al. “Pygmy dipole strength in 86Kr and systematics of N=50 isotones.” Physical Review C - Nuclear Physics, vol. 87, no. 2, Feb. 2013. Scopus, doi:10.1103/PhysRevC.87.024306.
Schwengner R, Massarczyk R, Rusev G, Tsoneva N, Bemmerer D, Beyer R, Hannaske R, Junghans AR, Kelley JH, Kwan E, Lenske H, Marta M, Raut R, Schilling KD, Tonchev A, Tornow W, Wagner A. Pygmy dipole strength in 86Kr and systematics of N=50 isotones. Physical Review C - Nuclear Physics. 2013 Feb 8;87(2).

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

February 8, 2013

Volume

87

Issue

2

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics