High-sensitivity investigation of low-lying dipole strengths in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Sn</mml:mi><mml:mprescripts /><mml:none /><mml:mn>120</mml:mn></mml:mmultiscripts></mml:math>

Müscher, M.; Wilhelmy, J.; Massarczyk, R.; Schwengner, R.; Grieger, Michael; Isaak, J.; Junghans, A. R.; Kögler, T.; Ludwig, F.; Savran, D.; Symochko, Dmytro; Takács, M. P.; Tamkas, M.; Wagner, A.; Zilges, A.

doi:10.1103/physrevc.102.014317

“…Besides, strength in the quasicontinuum was not taken into account in that analysis. Similar discrepancies resulting from missing strength in the quasicontinuum were also reported in other recent studies [49,69,70]. On the other hand, the present b 0 (E) include uncertainties of the inputs for the statistical cascade simulations, for example, of the level-density model. )…”

Section: Discussionsupporting

confidence: 88%

Photoexcitation of $^{76}$Ge

Schwengner,

Massarczyk,

Schmidt

et al. 2021

Preprint

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0

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The dipole strength of the nuclide 76 Ge was studied in photon-scattering experiments using bremsstrahlung produced with electron beams of energies of 7.8 and 12.3 MeV at the γELBE facility. We identified 210 levels up to an excitation energy of 9.4 MeV and assigned spin J = 1 to most of them. The quasicontinuum of unresolved transitions was included in the analysis of the spectra and the intensities of branching transitions were estimated on the basis of simulations of statistical γ-ray cascades. The photoabsorption cross section up to the neutron-separation energy was determined and is compared with predictions of the statistical reaction model. The derived photon strength function is compared with results of experiments using other reactions.

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“…This phenomenon is denoted as pygmy dipole resonance (PDR) and has been intensively studied in recent years. [ 121–128 ] In a simplified geometrical picture, the PDR is described as neutron skin oscillating against a

N=Z

core. The PDR phenomenon is discussed in more detail in Section 4.2.…”

Section: Nuclear Physics With Gf Secondary‐photon Beam On Fixed Targetsmentioning

confidence: 99%

“…[ 158–162 ] Hence, the far‐reaching impact of understanding the E 1 strength distribution of the PDR motivated still ongoing extensive experimental and theoretical studies in a wide mass range. [ 121,123–126,128,163–168 ] In a recent work at GSI, [ 166 ] PDR were studied in a chain of chromium isotopes, see Table 4 .…”

Section: Nuclear Physics With Gf Secondary‐photon Beam On Fixed Targetsmentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

Budker

¹

,

Berengut

²

,

Flambaum

³

et al. 2022

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The Gamma Factory (GF) is an ambitious proposal, currently explored within the CERN Physics Beyond Colliders program, for a source of photons with energies up to ≈400 MeV and photon fluxes (up to ≈1017 photons s−1) exceeding those of the currently available gamma sources by orders of magnitude. The high‐energy (secondary) photons are produced via resonant scattering of the primary laser photons by highly relativistic partially‐stripped ions circulating in the accelerator. The secondary photons are emitted in a narrow cone and the energy of the beam can be monochromatized, down to 10−3–10−6 level, via collimation, at the expense of the photon flux. This paper surveys the new opportunities that may be afforded by the GF in nuclear physics and related fields.

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“…Several experimental studies using electromagnetic probes have found an enhancement of electric dipole strength between about 5 and 10 MeV. This phenomenon is denoted as pygmy dipole resonance (PDR) and has been intensively studied in recent years [119][120][121][122][123][124][125][126]. In a simplified geometrical picture, the PDR is described as neutron skin oscillating against a N = Z core.…”

Section: Nuclear Physics With Gf Secondary-photon Beam On Fixed Targetsmentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

Budker,

Berengut,

Flambaum

et al. 2021

Preprint

View full text Add to dashboard Cite

The Gamma Factory (GF) is an ambitious proposal, currently explored within the CERN Physics Beyond Colliders program, for a source of photons with energies up to ≈ 400 MeV and photon fluxes (up to ≈ 10 17 photons per second) exceeding those of the currently available gamma sources by orders of magnitude. The high-energy (secondary) photons are produced via resonant scattering of the primary laser photons by highly relativistic partially-stripped ions circulating in the accelerator. The secondary photons are emitted in a narrow cone and the energy of the beam can be monochromatized, eventually down to the ≈ 1 ppm level, via collimation, at the expense of the photon flux. This paper surveys the new opportunities that may be afforded by the GF in nuclear physics and related fields. CONTENTS 11.2. Photon Splitting 48 11.3. Photon Scattering 48 12. Nuclear physics with tertiary beams 49 12.1. Tertiary beams at the GF 49 12.2. Polarized electron, positron and muon sources 49 12.3. High-purity neutrino beams 50 12.4. Neutron and radioactive ion sources 50 12.5. Production of monoenergetic fast neutrons 51 12.6. Metrology with keV neutrons 51 13. Nuclear physics opportunities at the SPS 51 14. Speculative ideas and open questions 51 14.1. Applying the Gamma Factory ideas at other facilities 51 14.2. Nuclear waste transmutation 52 14.3. Laser polarization of PSI 52 14.4. Quark-gluon plasma with polarized PSI 52 14.5. Ground-state hyperfine-structure transitions in PSI 52 14.6. Detection of gravitational waves 53 15. Conclusions and optimistic outlook 53 Acknowledgments 53 Appendix 54 A. Survey of existing and forthcoming gamma facilities 54

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High-sensitivity investigation of low-lying dipole strengths in Sn120

Cited by 18 publications

References 73 publications

Photoexcitation of $^{76}$Ge

Photoexcitation of $^{76}$Ge

Expanding Nuclear Physics Horizons with the Gamma Factory

Expanding Nuclear Physics Horizons with the Gamma Factory

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