Journal article
Authors list: Scheck, M; von Garrel, H; Tsoneva, N; Belic, D; von Brentano, P; Fransen, C; Gade, A; Jolie, J; Kneissl, U; Kohstall, C; Linnemann, A; Nord, A; Pietralla, N; Pitz, HH; Stedile, F; Stoyanov, C; Werner, V
Publication year: 2004
Journal: Physical Review C
Volume number: 70
Issue number: 4
ISSN: 0556-2813
eISSN: 1089-490X
DOI Link: https://doi.org/10.1103/PhysRevC.70.044319
Publisher: American Physical Society
Abstract:
The low-lying dipole strength distributions in the odd-mass isotopes Ba-135,Ba-137 were studied in nuclear resonance fluorescence experiments (NRF) performed at the Stuttgart Dynamitron facility using bremsstrahlung beams with end point energies of 4.1, 3.1, and 2.5 MeV. Numerous excited states, most of them unknown so far, were observed in the excitation energy range up to 4 MeV. Detailed spectroscopic information has been obtained on excitation energies, decay widths, decay branching ratios, and transition probabilities. The results for Ba-137 are compared with calculations in the framework of the Quasiparticle-Phonon Model. The new data for Ba-135,Ba-137 complete the systematics of low-lying dipole excitations as observed for the even Ba isotopes Ba-134,Ba-136,Ba-138 in previous NRF experiments in Stuttgart. The complete systematics within the Ba isotopic chain, exhibiting a nuclear shape transition, is discussed with respect to E1 two-phonon excitations, M1 scissors mode excitations, and in regard to the new critical point symmetries.
Citation Styles
Harvard Citation style: Scheck, M., von Garrel, H., Tsoneva, N., Belic, D., von Brentano, P., Fransen, C., et al. (2004) Dipole strength distributions in the stable Ba isotopes 134-138Ba:: A study in the mass region of a nuclear shape transition -: art. no. 044319, PHYSICAL REVIEW C, 70(4), Article 044319. https://doi.org/10.1103/PhysRevC.70.044319
APA Citation style: Scheck, M., von Garrel, H., Tsoneva, N., Belic, D., von Brentano, P., Fransen, C., Gade, A., Jolie, J., Kneissl, U., Kohstall, C., Linnemann, A., Nord, A., Pietralla, N., Pitz, H., Stedile, F., Stoyanov, C., & Werner, V. (2004). Dipole strength distributions in the stable Ba isotopes 134-138Ba:: A study in the mass region of a nuclear shape transition -: art. no. 044319. PHYSICAL REVIEW C. 70(4), Article 044319. https://doi.org/10.1103/PhysRevC.70.044319
Keywords
COLLECTIVE MODES; EXCITATIONS; PARTICLE MULTIPLET; PHOTOEXCITATION; PHOTONEUTRON CROSS-SECTIONS; RESONANCE FLUORESCENCE; SCISSORS MODE