On the time response of background obtained in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si0005.gif" overflow="scroll"><mml:mi mathvariant="normal">γ</mml:mi></mml:math>-ray spectroscopy experiments using LaBr3(Ce) detectors with different shielding

Régis, J.‐M.; Dannhoff, M.; Jolie, J.; Müller-Gatermann, C.; Saed-Samii, N.

doi:10.1016/j.nima.2015.12.017

Cited by 16 publications

(5 citation statements)

References 23 publications

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“…Once the resulting prompt γ -ray spectrum was obtained, it was unfolded by using a GEANT4 [12] Monte Carlo simulated response function. The simulated response function of LaBr 3 :Ce detectors is very sensitive to the detector's surroundings, especially at low energies around the backscatter peak region (below 300 keV) [13]. The simulations needed to be validated every time that the measurement setup was modified by comparing measured and simulated responses for well-calibrated γ -ray energies.…”

Section: B Time-of-flight Discriminationmentioning

confidence: 99%

Prompt-fission γ -ray spectral characteristics from Pu239(nth,f)

Gatera

Belgya²,

Geerts³

et al. 2017

Phys. Rev. C

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In this paper we present new results for prompt fission γ-ray spectral characteristics from the thermal neutron induced fission of 240 Pu *. The measured spectra were unfolded by using the detectors' response functions, simulated with GEANT4. We obtained in average per fission a γ-ray multiplicityM γ = (7.35 ± 0.12), a mean photon energy¯ γ = (0.85 ± 0.02) MeV, and an average total energy released in fissionĒ γ,tot = (6.27 ± 0.11) MeV. Our results are in good agreement with historical data measured in the 1970s by Verbinski et al. and results from recent calculations in the framework of Monte Carlo Hauser-Feshbach models. Our measured average total energy is slightly smaller than the one deduced previously and present in evaluated data. From this we conclude that the 239 Pu(n th ,f) reaction may be ruled out as possible source of γ heating underestimation, when compared with benchmark calculations based on existing nuclear data.

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Section: B Time-of-flight Discriminationmentioning

confidence: 99%

Prompt-fission γ -ray spectral characteristics from Pu239(nth,f)

Gatera

Belgya²,

Geerts³

et al. 2017

Phys. Rev. C

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“…γ Rays were detected with a mixed γ -ray detector array employing eight high-purity germanium (hereafter called HPGe) and 12 cerium-doped lanthanumbromide (hereafter called LaBr 3 ) detectors, mounted in the frame of the High efficiency Observatory for γ -Ray Unique Spectroscopy (HORUS) array [58]. Six of the LaBr 3 detectors were surrounded by bismuth-germanate (BGO) veto detectors to suppress the Compton background [59]. Coincident events were processed and recorded utilizing the synchronized 80-MHz XIA Digital Gamma Finder (DGF) data-acquisition system and stored to disk.…”

Section: Methodsmentioning

confidence: 99%

Isomer spectroscopy in Ba133 and high-spin structure of Ba134

Kaya¹,

Vogt²,

Reiter³

et al. 2019

Phys. Rev. C

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The transitional nuclei 134 Ba and 133 Ba are investigated after multinucleon transfer employing the highresolution Advanced GAmma Tracking Array coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and after fusion-evaporation reaction at the FN tandem accelerator of the University of Cologne, Germany. The J π = 19/2 + state at 1942 keV in 133 Ba is identified as an isomer with a half-life of 66.6(20) ns corresponding to a B(E 1) value of 7.7(4) × 10 −6 e 2 fm 2 for the J π = 19/2 + to J π = 19/2 − transition. The level scheme of 134 Ba above the J π = 10 + isomer is extended to approximately 6 MeV. A pronounced backbending is observed athω = 0.38 MeV along the positive-parity yrast band. The results are compared to the high-spin systematics of the Z = 56 isotopes. Large-scale shell-model calculations employing the GCN50:82, SN100PN, SNV, PQM130, Realistic SM, and EPQQM interactions reproduce the experimental findings and elucidate the structure of the high-spin states. The shell-model calculations employing the GCN50:82 and PQM130 interactions reproduce alignment properties and provide detailed insight into the microscopic origin of this phenomenon in transitional 134 Ba.

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“…To measure the excited state lifetimes in Dy isotopes the fast timing technique [26,27] was implemented. This γ -ray coincidence method takes advantage of the excellent timing resolution available in the LaBr 3 scintillators.…”

Section: Lifetime Measurement Techniquesmentioning

confidence: 99%

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C
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We report on the measurement of lifetimes of excited states in the near-mid-shell nuclei 164,166 Dy using the gamma-ray coincidence fast-timing method. The nuclei of interest were populated using reactions between an 18 O beam and a gold-backed isotopically enriched 164 Dy target of thickness 6.3 mg/cm 2 at primary beam energies of 71, 76, and 80 MeV from the IPN-Orsay laboratory, France. Excited states were populated in 164 Dy, 166 Dy, and 178,179 W following Coulomb excitation, inelastic nuclear scattering, two-neutron transfer, and fusionevaporation reaction channels respectively. Gamma rays from excited states were measured using the ν-Ball high-purity germanium (HPGe)-LaBr 3 hybrid γ-ray spectrometer with the excited state lifetimes extracted using the fast-timing coincidence method using HPGe-gated LaBr 3-LaBr 3 triple coincident events. The lifetime of the first I π = 2 + excited state in 166 Dy was used to determine the transition quadrupole deformation of this neutron-rich nucleus for the first time. The experimental methodology was validated by showing consistency with previously determined excited state lifetimes in 164 Dy. The half-lives of the yrast 2 + states in 164 Dy and 166 Dy were 2.35(6) and 2.3(2) ns, respectively, corresponding to transition quadrupole moment values of Q 0 = 7.58(9) and 7.5(4) eb, respectively. The lifetime of the yrast 2 + state in 166 Dy is consistent with a quenching of nuclear quadrupole deformation at β ≈ 0.35 as the N = 104 mid-shell is approached.

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On the time response of background obtained in γ-ray spectroscopy experiments using LaBr3(Ce) detectors with different shielding

Cited by 16 publications

References 23 publications

Prompt-fission γ -ray spectral characteristics from Pu239(nth,f)

Prompt-fission γ -ray spectral characteristics from Pu239(nth,f)

Isomer spectroscopy in Ba133 and high-spin structure of Ba134

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C
Self Cite

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On the time response of background obtained in γ-ray spectroscopy experiments using LaBr3(Ce) detectors with different shielding

Cited by 16 publications

References 23 publications

Prompt-fission γ -ray spectral characteristics from Pu239(nth,f)

Prompt-fission γ -ray spectral characteristics from Pu239(nth,f)

Isomer spectroscopy in Ba133 and high-spin structure of Ba134

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the Canavan1, Rudigier2, Regan3 et al. 2020Phys. Rev. CSelf Cite

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Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C
Self Cite