arXiv : Photoexcitation of $^{76}$Ge

Schwengner, R.; Hensel, T.; Urlaß, S.; Hoffmann, H.F.; Müller, S.E.; Hammer, S.; Zuber, K.; Bemmerer, D.; Massarczyk, R.; Pichotta, M.; Turko, J.A.B.; Junghans, A.R.; Turkat, S.; Beyer, R.; Hartmann, A.; Wagner, A.; Schmidt, K.; Kögler, T.

doi:10.1103/PhysRevC.105.024303

Article
Report number	arXiv:2106.12214
Title	Photoexcitation of $^{76}$ Ge
Related title	Photoexcitation of Ge76
Author(s)	Schwengner, R. (HZDR, Dresden) ; Massarczyk, R. (Los Alamos) ; Schmidt, K. (HZDR, Dresden) ; Zuber, K. (Dresden, Tech. U.) ; Beyer, R. (HZDR, Dresden) ; Bemmerer, D. (HZDR, Dresden) ; Hammer, S. (HZDR, Dresden) ; Hartmann, A. (HZDR, Dresden) ; Hensel, T. (HZDR, Dresden ; Dresden, Tech. U.) ; Hoffmann, H.F. (HZDR, Dresden ; Dresden, Tech. U.) Zeige alle 18 Autoren
Publication	2022-02-04
Imprint	2021-06-23
Number of pages	12
Note	12 pages, 9 figures
In:	Phys. Rev. C 105 (2022) 024303
DOI	10.1103/PhysRevC.105.024303 (publication)
Subject category	nucl-ex ; Nuclear Physics - Experiment
Abstract	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 $\gamma$ ELBE 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 $\gamma$ -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.
Copyright/License	publication: © 2022-2025 authors (License: CC BY 4.0) preprint: (License: CC BY 4.0)

$Part of a spectrum of photons scattered from $^{76}$Ge combined with $^{11}$B, measured during the irradiation with bremsstrahlung produced by electrons of an energy of $E_e^{\rm kin}$ = 12.3 MeV. This spectrum is the sum of the spectra measured with the two detectors placed at 127$^\circ$ relative to the beam at $\gamma$ELBE. The arrow labeled $S_n$ indicates the neutron-separation energy.$ $Average absolute photon flux on the $^{11}$B target deduced from intensities of known transitions in $^{11}$B for the measurements at $E_e$ = 7.8 MeV (triangles) and $E_e$ = 12.3 MeV (circles) at $\gamma$ELBE. The curves represent the calculated flux described in the text.$ $Parts of spectra measured at $E_e$ = 7.8 MeV (bottom) and $E_e$ = 12.3 MeV (top) showing the energy section around the expected 2039 keV signal. Note that the 7.8 MeV spectrum was scaled up by a factor of 1.8 to make the two spectra better comparable. The labels $2^+_7 \rightarrow 2^+_2$ and $0^+_3 \rightarrow 2^+_1$ mark the corresponding transitions in $^{76}$Ge, 2039 is the energy of the $0\nu\beta\beta$ signal and $^{11}$B denotes a transition in this nuclide.$ Show more plots

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