Data-flow coupling and data-acquisition triggers for the PreSPEC-AGATA campaign at GSI

Ralet, D.; Aubert, Yoann; Bellato, M.; Bortolato, D.; Brambilla, S.; Camera, F.; Dosme, N.; Gadea, A.; Gerl, J.; Golubev, P.; Grave, X.; Johansson, H.; Karkour, N.; Korichi, A.; Kurz, N.; Lafay, X.; Legay, E.; Linget, D.; Pietralla, N.; Rudolph, Dirk; Schaffner, H.; Stézowski, O.; Travers, B.; Wieland, O.

doi:10.1016/j.nima.2015.03.025

Cited by 11 publications

(8 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The standard FRS detector suite was used for the identification of ions in the second stage of the FRS as described in Ref. [23]. The fission products reached a secondary ∼700-mg/cm 2 thick beryllium target to undergo knock-out and enable in-beam γ -ray spectroscopy.…”

Section: Experimental Approachmentioning

confidence: 99%

“…More details on the trigger system can be found in Ref. [23]. In this experiment, an energy threshold on the γ -ray trigger request was set at ∼100 keV for the AGATA detectors and ∼250 keV for the HECTOR+detectors.…”

Section: Experimental Approachmentioning

confidence: 99%

“…The trigger number corresponds to the type of coincidence requested in this experiment (see text and Ref. [23] for additional details). beam velocity by…”

Section: Fragment Identificationmentioning

confidence: 99%

“…More details on the electronics and the LYCCA detectors can be found in Refs. [23,25]. In addition to the particleidentification, the LYCCA calorimeter tracked the ejectiles combining the positions measured by a DSSSD detector positioned 58 mm in front of the target and the DSSSD detectors from the telescope positioned 3016 mm behind the target [25].…”

Section: Fragment Identificationmentioning

confidence: 99%

See 3 more Smart Citations

Lifetime measurement of neutron-rich even-even molybdenum isotopes

Ralet¹,

Piétri²,

Rodríguez³

et al. 2017

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Background: In the neutron-rich A ≈ 100 mass region, rapid shape changes as a function of nucleon number as well as coexistence of prolate, oblate, and triaxial shapes are predicted by various theoretical models. Lifetime measurements of excited levels in the molybdenum isotopes allow the determination of transitional quadrupole moments, which in turn provides structural information regarding the predicted shape change. Purpose: The present paper reports on the experimental setup, the method that allowed one to measure the lifetimes of excited states in even-even molybdenum isotopes from mass A = 100 up to mass A = 108, and the results that were obtained. Method:The isotopes of interest were populated by secondary knock-out reaction of neutron-rich nuclei separated and identified by the GSI fragment separator at relativistic beam energies and detected by the sensitive PreSPEC-AGATA experimental setup. The latter included the Lund-York-Cologne calorimeter for identification, tracking, and velocity measurement of ejectiles, and AGATA, an array of position sensitive segmented HPGe detectors, used to determine the interaction positions of the γ ray enabling a precise Doppler correction. The lifetimes were determined with a relativistic version of the Doppler-shift-attenuation method using the systematic shift of the energy after Doppler correction of a γ -ray transition with a known energy. This relativistic Doppler-shiftattenuation method allowed the determination of mean lifetimes from 2 to 250 ps. Results: Even-even molybdenum isotopes from mass A = 100 to A = 108 were studied. The decays of the low-lying states in the ground-state band were observed. In particular, two mean lifetimes were measured for the first time: τ = 29.7 Conclusions:The reduced transition strengths B(E2), calculated from lifetimes measured in this experiment, compared to beyond-mean-field calculations, indicate a gradual shape transition in the chain of molybdenum isotopes when going from A = 100 to A = 108 with a maximum reached at N = 64. The transition probabilities decrease for 108 Mo which may be related to its well-pronounced triaxial shape indicated by the calculations.

show abstract

Section: Experimental Approachmentioning

confidence: 99%

Section: Experimental Approachmentioning

confidence: 99%

“…The trigger number corresponds to the type of coincidence requested in this experiment (see text and Ref. [23] for additional details). beam velocity by…”

Section: Fragment Identificationmentioning

confidence: 99%

Section: Fragment Identificationmentioning

confidence: 99%

See 2 more Smart Citations

Lifetime measurement of neutron-rich even-even molybdenum isotopes

Ralet¹,

Piétri²,

Rodríguez³

et al. 2017

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…The AGATA array was first implemented and operated at the INFN-Laboratori Nazionali di Legnaro (LNL) [24] and then at the final focal plane of the FRagment Separator (FRS) at the GSI facility [25][26][27]. The third implementation is at the GANIL facility, Caen -France, offering unique opportunities for high resolution in-beam γ-ray spectroscopy.…”

Section: Introductionmentioning

confidence: 99%