The decay pattern of the Pygmy Dipole Resonance of 140Ce

Löher, B.; Savran, D.; Aumann, T.; Beller, J.; Bhike, M.; Cooper, Nathan; Derya, V.; Duchêne, M.; Endres, J.; Hennig, Andreas; Humby, P.; Isaak, J.; Kelley, J. H.; Knörzer, M.; Pietralla, N.; Ponomarev, V. Yu.; Romig, C.; Scheck, M.; Scheit, H.; Silva, J.; Tonchev, A. P.; Tornow, W.; Wamers, F.; Weller, H. R.; Werner, V.; Zilges, A.

doi:10.1016/j.physletb.2016.02.042

Cited by 44 publications

(63 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The recent HIγ S experiment confirmed that the branchings of the resonantly excited states are on the level of few percent [4,8,15], thus the inelastic strength is dominated by the inelastic transitions from the tail of the GDR. The narrow width of the beam profile at the HIγ S facility (200-300 keV per incident energy) removed any ambiguity that these low-lying exited states can be populated from off-energy photons.…”

Section: Experimental Techniquesmentioning

confidence: 97%

Capture cross sections on unstable nuclei

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract. Accurate neutron-capture cross sections on unstable nuclei near the line of beta stability are crucial for understanding the s-process nucleosynthesis. However, neutron-capture cross sections for short-lived radionuclides are difficult to measure due to the fact that the measurements require both highly radioactive samples and intense neutron sources. Essential ingredients for describing the γ decays following neutron capture are the γ -ray strength function and level densities. We will compare different indirect approaches for obtaining the most relevant observables that can constrain Hauser-Feshbach statistical-model calculations of capture cross sections. Specifically, we will consider photon scattering using monoenergetic and 100% linearly polarized photon beams. Challenges that exist on the path to obtaining neutron-capture cross sections for reactions on isotopes near and far from stability will be discussed.

show abstract

Section: Experimental Techniquesmentioning

confidence: 97%

Capture cross sections on unstable nuclei

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…(A8) and (A9), it is calculated as 24 Ne, 25 Ne, and 26 Ne. Symbols denoted by "positive" or "negative" show the results of the energy variation after the parity projection, while others show those after the angular momentum projection.…”

Section: E Overlap Amplitude and Spectroscopic Factormentioning

confidence: 99%

“…If the PDR is dominated by the neutron excitation coupled to the excited 25 Ne, the observed decay pattern can be straightforwardly understood. In particular, the coupling of the neutron excitation with the low-lying collective modes such as rotation and vibration [24] may play an important role, because it is well known that the neutron excitation across the N = 20 shell gap induces strong deformation of Ne isotopes in the island of inversion [25]. Theoretically, the microscopic description of the rotation and vibration coupling requires treatment beyond the linear response.…”

Section: Introductionmentioning

confidence: 99%

“…The theoretical framework of shifted-basis AMD is explained in Sec. II, and the numerical results for the low-lying spectrum of 24,25,26 Ne and the electric dipole response of 26 Ne are presented in Sec. III.…”

Section: Introductionmentioning

confidence: 99%

“…

The low-lying spectra of 24,25,26 Ne and the structure of the pygmy dipole resonance (PDR) in 26 Ne have been theoretically studied by the antisymmetrized molecular dynamics (AMD) and its extended version called shifted-basis AMD. The calculated energy and strength of the PDR reasonably agree with the observation, and the analysis of the wave function shows that the PDR is dominated by neutron excitation coupled to the quadrupole excited core nucleus 25 Ne, which explains the observed unexpected decay of PDR to the excited states of 25 Ne.

…”

mentioning

confidence: 99%

See 2 more Smart Citations