Characterization of a ballistic supermirror neutron guide

Abele, H.; Dubbers, D.; Häse, H.; Klein, Martin; Knöpfler, A.; Kreuz, Michael; Lauer, T.; Märkisch, Bastian; Mund, D.; Nesvizhevsky, V. V.; Petoukhov, A.; Schmidt, C.; Schümann, M.; Söldner, T.

doi:10.1016/j.nima.2006.03.020

Cited by 148 publications

(114 citation statements)

References 14 publications

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“…The mixed array was installed at the exit of the collimation line of the cold-neutron guide PF1B [14,15] of the ILL reactor. The collimated cold-neutron beam 12 mm in diameter provided a flux of 10 8 neutrons per second and cm 2 at the target position to induce fission in 235 U.…”

Section: Experimental Setup Methods and Resultsmentioning

confidence: 99%

Abrupt shape transition at neutron number N=60 : B(E2) values in Sr
Régis¹,
Jolie²,
Saed-Samii³
et al. 2017
Phys. Rev. C
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Lifetimes of low-lying yrast states in neutron-rich 94,96,98 Sr have been measured by Germanium-gated γ -γ fast timing with LaBr3(Ce) detectors using the EXILL&FATIMA spectrometer at the Institut Laue-Langevin. Sr fission products were generated using cold-neutron-induced fission of 235 U and stopped almost instantaneously within the thick target. The experimental B(E2) values are compared with results of Monte Carlo shell-model calculations made without truncation on the occupation numbers of the orbits spanned by eight proton and eight neutron orbits and show good agreement. Similarly to the Zr isotopes, the abrupt shape transition in the Sr isotopes near neutron number N = 60 is identified as being caused by many-proton excitations to its g 9/2 orbit.

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Section: Experimental Setup Methods and Resultsmentioning

confidence: 99%

Abrupt shape transition at neutron number N=60 : B(E2) values in Sr
Régis¹,
Jolie²,
Saed-Samii³
et al. 2017
Phys. Rev. C
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34
2
27
0
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“…This FATIMA spectrometer was combined with part of the EXILL (EXOGAM at ILL [10]) spectrometer consisting of 8 HPGe EXOGAM Clover detectors. Within the EXILL&FATIMA campaign, fast electronic timing measurements were performed in prompt γ-ray spectroscopy experiments using neutron-capture and neutron-induced fission reactions at the highly collimated high-flux cold-neutron beam facility PF1B [11,12] of the ILL. Triple coincidences were used in which a Ge gate selects the cascade of γ rays to be measured by the LaBr 3 detectors.…”

Section: The Gcd Methods For Exillandfatimamentioning

confidence: 99%

The Generalized Centroid Difference method for lifetime measurements viaγ-γcoincidences using large fast-timing arrays

Régis

Jolie

Mach

et al. 2015

EPJ Web of Conferences

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Abstract.A novel method for direct electronic "fast-timing" lifetime measurements of nuclear excited states via γ-γ coincidences using an array equipped with N very fast high-resolution LaBr 3 (Ce) scintillator detectors is presented. The generalized centroid difference method provides two independent "start" and "stop" time spectra obtained without any correction by a superposition of the N(N − 1)/2 calibrated γ-γ time difference spectra of the N detector fast-timing system. The two fast-timing array time spectra correspond to a forward and reverse gating of a specific γ-γ cascade and the centroid difference as the time shift between the centroids of the two time spectra provides a picosecond-sensitive mirror-symmetric observable of the set-up. The energydependent mean prompt response difference between the start and stop events is calibrated and used as a single correction for lifetime determination. These combined fast-timing array mean γ-γ zero-time responses can be determined for 40 keV < E γ < 1.4 MeV with a precision better than 10 ps using a 152 Eu γ-ray source. The new method is described with examples of (n,γ) and (n,f,γ) experiments performed at the intense cold-neutron beam facility PF1B of the Institut Laue-Langevin in Grenoble, France, using 16 LaBr 3 (Ce) detectors within the EXILL&FATIMA campaign in 2013. The results are discussed with respect to possible systematic errors induced by background contributions.

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“…During autumn 2012 and spring 2013 the EXOGAM spectrometer [1] and additional detectors were installed on the high intensity cold neutron guide PF1B [2] of the Institut Laue Langevin (ILL) for the EXILL campaign. EXILL is partially a follow-up of a previous campaign using 8 EUROBALL capsule Ge detectors and a highly collimated cold neutron beam for (n,J) measurements [3].…”

Section: Introductionmentioning

confidence: 99%

The (n,γ) campaigns at EXILL

Jolie

Régis

Wilmsen

et al. 2015

EPJ Web of Conferences

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Abstract. At the PF1B cold neutron beam line at the Institut Laue Langevin, the EXILL array consisting of EXOGAM, GASP and ILL-Clover detectors was used to perform (n,J) measurements at very high coincidence rates. About ten different reactions were measured in autumn 2012 using a highly collimated cold neutron beam. In spring 2013, the EXOGAM array was combined with 16 LaBr 3 (Ce) scintillators in the EXILL&FATIMA campaign for the measurement of lifetimes using the generalised centroid difference method. We report on the properties of the set-ups and present first results from both campaigns.

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Characterization of a ballistic supermirror neutron guide

Cited by 148 publications

References 14 publications

Abrupt shape transition at neutron number N=60 : B(E2) values in Sr
Régis¹,
Jolie²,
Saed-Samii³
et al. 2017
Phys. Rev. C
Self Cite
34
2
27
0
View full text Add to dashboard Cite

Abrupt shape transition at neutron number N=60 : B(E2) values in Sr
Régis¹,
Jolie²,
Saed-Samii³
et al. 2017
Phys. Rev. C
Self Cite
34
2
27
0
View full text Add to dashboard Cite

The Generalized Centroid Difference method for lifetime measurements viaγ-γcoincidences using large fast-timing arrays

The (n,γ) campaigns at EXILL

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Characterization of a ballistic supermirror neutron guide

Cited by 148 publications

References 14 publications

Abrupt shape transition at neutron number N=60 : B(E2) values in SrRégis1, Jolie2, Saed-Samii3 et al. 2017Phys. Rev. CSelf Cite342270View full textAdd to dashboardCite

Abrupt shape transition at neutron number N=60 : B(E2) values in SrRégis1, Jolie2, Saed-Samii3 et al. 2017Phys. Rev. CSelf Cite342270View full textAdd to dashboardCite

The Generalized Centroid Difference method for lifetime measurements viaγ-γcoincidences using large fast-timing arrays

The (n,γ) campaigns at EXILL

Contact Info

Product

Resources

About

Abrupt shape transition at neutron number N=60 : B(E2) values in Sr
Régis¹,
Jolie²,
Saed-Samii³
et al. 2017
Phys. Rev. C
Self Cite
34
2
27
0
View full text Add to dashboard Cite

Abrupt shape transition at neutron number N=60 : B(E2) values in Sr
Régis¹,
Jolie²,
Saed-Samii³
et al. 2017
Phys. Rev. C
Self Cite
34
2
27
0
View full text Add to dashboard Cite