66 research outputs found
Clusterization and Strong Coulpled-Channels Effects in Deuteron Interaction with 9Be Nuclei
No full textAngular distributions of protons, deuterons, tritons and alphaparticles emitted in the d + 9Be reaction at Elab=19.5 and 35.0 MeV have been measured. The elastic scattering channel is analysed in the framework of both the Optical Model and the Coupled-Channel approach. The interaction potential of the d + 9Be system is calculated in the framework of the Double-Folding model using the α + α + n three-body wave function of the 9Be nucleus. The (d, p) and (d, t) one-nucleon-transfer reactions are analysed within the coupledreaction-channel approach. The spectroscopic amplitudes for the different nuclear cluster configurations are calculated. Differential cross sections for the reaction channel 9Be(d, α) 7Li are calculated including all possible reaction mechanisms within the coupled-reaction-channel method. Corresponding contributions to the cross sections are analysed.peerReviewe
Study of N = 50 gap evolution around Z = 32: new structure information for 82Ge
No full textW tej pracy badano stany yrastowe w bogatym w neutrony jądrze 82Ge za pomocą reakcji rozszczepienia indukowanej neutronami. Dzięki wysokiej wydajności spektrometru ν-Ball, przy użyciu potrójnych koincydencji gamma, dwie wcześniej nieodnotowane przejścia zostały jednoznacznie przypisane do 82Ge. Przejścia te umieszczono w schemacie poziomów. Zidentyfikowano również nowy stan jądrowy o energii wzbudzenia 3947,9 keV. Spin Jπ = 7+, został przypisany do nowo zidentyfikowanego stanu na podstawie konfiguracji cząstka-dziura (νg9/2)-1(νd5/2)1.
This study investigated the yrast states in the neutron-rich nucleus 82Ge through neutron-induced fission reactions. Thanks to the high efficiency of the ν-Ball spectrometer, using triple gamma coincidences, two previously unreported transitions were clearly assigned to 82Ge. These transitions were placed in the level scheme. A new nuclear state with an excitation energy of 3947.9 keV was also identified. The spin Jπ = 7+ was assigned to the newly identified state based on the particle-hole configuration (νg9/2)-1(νd5/2)1.Nieprzetworzone dane są zapisane w postaci plików *.dat, zawierających informacje o liczbie zarejestrowanych kwantów gamma o określonej energii. Takie widma sporządzono dla warunków, w których to, co najmniej 3, 4, 5, oraz 6 kwantów gamma było jednocześnie rejestrowanych przez układ detekcyjny. Dane zebrano w taki sposób, że energia kwantu gamma jest proporcjonalna w stosunku 1:1 do kanału określonego na widmie. Dane binarne można w prosty sposób przekształcić do plików typu ROOT, a stamtąd do odpowiednich macierzy gamma-gamma. Kody sortujące nieprzetworzone dane do różnych formatów a także dane pochodne odpowiadające różnym warunkom koincydencyjnym są dostępne po uprzednim kontakcie: [email protected]
Raw data is stored in *.dat files, containing information about the number of registered gamma quanta with a specific energy. Such spectra were prepared for conditions where at least 3, 4, 5, and 6 gamma quanta were simultaneously registered by the detection system. The data was collected in such a way that the energy of the gamma quantum is in a 1:1 proportion to the channel specified on the spectrum. Binary data can be easily converted into ROOT files, and from there into the corresponding gamma-gamma matrices. Sorting codes for raw data into different formats, as well as derivative data corresponding to different coincidence conditions, are available upon prior contact: [email protected] Centrum Nauki, Polska2020/39/D/ST2/0351
The -ball -spectrometer
No full textInternational audienceThe ν -ballspectrometer is an hybrid array combining high purity co-axial germanium detectors from the french-UK loan pool, clover detectors from the GAMMAPOOL, lanthanum bromide (LaBr 3 :Ce) scintillator detectors belonging to the FATIMA collaboration and phoswitches from the PARIS collaboration. The aim was to couple the excellent energy resolution of germanium detectors to the excellent time resolution of the LaBr 3 detectors. We achieved a total photopeak efficiency of 6.7% at 1.3 MeV, and peak-to-total ratio of 50% for the germanium part of the array. Using the digital acquisition system FASTER, we achieved time resolution of about 250 ps for LaBr 3 . This acquisition system made also possible the use of the calorimetry for reaction selection. It makes ν -ball the first fully digital large fast timing spectrometer with time resolution similar to analogue electronics. The construction began in June 2017 and commissioning was performed in early November 2017. From November 2017 to June 2018, more than 3200 h of beam time were provided by the ALTO facility to perform eight experiments during the campaign. Among them, five weeks of beam time were dedicated to γ spectroscopy of fast neutron induced reactions. In this paper all the technical details about the spectrometer are presented. First steps of the data analysis process are also discussed
Pulse shape discrimination with silicon detectors using charge and current-sensitive preamplifiers
No full textVENDETA: VErsatile Neutron DETector Array, a new high-resolution neutron time-of-flight measurement array
No full textInternational audienceThe VErsatile Neutron DETector Array (VENDETA) is a high-resolution time-of-flight array for neutron detection. VENDETA’s liquid scintillator detectors offer a high intrinsic efficiency for neutron detection from 100keV to 20MeV, as well as neutron-γ discrimination capabilities down to 10keVee. VENDETA was specifically designed for versatility and is relevant for a wide range of physics measurements, from prompt fission neutron spectra measurements to neutron spectroscopy studies, such as elastic and inelastic neutron scattering measurements. VENDETA was first deployed at the Los Alamos Neutron Science Center. This article will provide a detailed overview of its characteristics
Le barbier de Seville: opera en quatre actes d\u27après Beaumarchais et le drame Italien
No full textPlace au factotum de la ville, place! la la la la la la la la la vîte an travail on seveille à Seville; vite.
la la la la la la la la la la! la belle vie envérité la belle vie, pour un barbier de qualité, de qualité.
ah! que mon sort est digne denvie; bravo. la la la la la la la la la la et me gaité jamais ne finira; non, non, la la la la la la la la la la! et ma gaîte jamais me finira, et ma gaîte jamais ne finira la le ran la la le ran la le ran la le ran la le ran la le ran la!
vene, venez a ma boutique, pauvres malades, venez la, prenez, prenez mon spécifi que de tous les maux il vous guerira. la le ran la le ran la le ran la le ran la le ran la le ran la le ran la!
fautil donner un coup de peigne, messieurs on est bientôt servi; oraoine t\u27on que l\u27on vous saigne, je puis vous opérer aussi et puis toujours faveurs nou velles avec les galans, avec les belles, avec les belles, la le ran la la àvec les galans; la le ran la la la!
la belle vie en vérite, la belle vie, pour un barbier de quanti té, de qualite.
De toutes parts on me demande, en mille lieux il faut que je me rende; cher Figaro, dépéchez vous al lez porter ce billet doux; vîte en coup de peigne; ah je me meurs il faut que l\u27on me saigne; dépéchez vous; al lez porter ce bil let doux; eh!
Figaro, Figaro, Figaro, Figaro, Figaro, Figaro, Figaro, Figaro, Figaro! de grâe, comment voulez vous que etasse? ah raissez-moi! respirer laissez moi respirer; ah! laissez moi respirer; ah! laissez moi respirer; Figaro? me voi qui! eh Figaro? me voila.
Figaro ci, Figaro là, Figaro ci, Figaro là, Figaro ci, Figaro là, Figaro ci, Figaro là à vous seavir voyez que je m\u27enpresse, je voudrais bien redoubler de vilesse qu\u27avez vous donc à désirer? qu\u27avez vous donc à désirer?
ah bravo Figaro bravo bravissimo, ah! bravo Figaro! bravo, bravissimo à la fortune à la fortune en peu d\u27instans tu vas voler; à la fortune à la fortune en peu d\u27instans tu vas voler, tu vas voler, tu vas voler, tu vas voler.
Largo al fattotum del la città, largo! la la la la la la la la la presto al hotega che l\u27alba grà presto.
la la la la la la la la la la! ah che bel vivere che bel vivere che bel vivere, per un barbier di qualità di qualità.
ah! bravo Figaro, bravo bravissimo bravo. la la la la la la la la la la! fortunatissimo per vertà fortunatissimo per verità. la le ran la la le ran la le ran la le ran la le ran la le ran la!
pronto a far tutto là notte il giorno sempre d\u27intornoingir sta miglier cucagna per un barbier vita piu no bile non non sida. la le ran la le ran la le ran la le ran la le ran la le ran la!
rasori e pettini lancettée forbi ci al mio comando tutto qui sta la risors poi del mestierrre col la donnetta col cavaliere col la donnetta la le ran la la la col cavaliere la le ran la la la!
la belle vie en verite, la belle vie, pour un barbiere di qualità di qualità.
Tutti mi chiedono tutti mi vogliono donnera-grazze vecchi fan chule quà la parrucca presto la barba quà la sanguina presto il biglietto tutti mi chiedono tutti mi vogliano tuti mi chiedono tuti mi vogliano qira le parrucca presto la barba presto il biglietto ei Figaro, Figaro, Figaro, Figaro, Figaro, Figaro, Figaro, Figaro, Figaro! ohimè ohimè che furia ohimè che foila uno aila volta per carità per carità uno alla volta uno alla volta uno alla volta per carier; Figaro? son qui! ehi figaro? son qui Figaro quà, Figaro là, Figaro qua, Figaro là, Figaro ci, Figaro giu Figaro sa, Figaro giu, pronto protissimo son come un lul mine sone il factotum della città della città della città della città della città
ah bravo Figaro bravo bravissimo ah! bravo Figaro! bravo, bravisssimo à te fortuna à te fortuna à te fortuna non mancherà sono il factotum della città sono il factotum della città della città della città della città
Cluster Structure of 9Be by Scattering of Deuterons
No full textAngular distributions of protons, deuterons, tritons and alpha particles emitted in
the reaction 2H+9Be at Elab=19.5 MeV were measured with an aim to shed light on the internal
cluster structure of 9Be and to study possible cluster transfer of 5He. The analyses suggest a
significant contribution of five-nucleon transfer in the reaction channel 9Be(d,
4He)7Li.peerReviewe
Study of the pygmy dipole resonance using neutron inelastic scattering at GANIL-SPIRAL2/NFS
No full textThe pygmy dipole resonance (PDR) has been the subject of numer-ous studies, both experimental and theoretical. Indeed, the study of the PDR has been and still is of great interest since it allows to constrain the symmetry energy, an important ingredient of the equation of state of nuclear matter that describes the matter within neutron stars. Moreover, the PDR is predicted to play a key role in the r-pro cess via the increase of the neutron capture rate. However, despite numerous experiments dedicated to the study of the PDR, a consistent description is still missing. In this context, we have proposed to study the PDR using a new probe: the neutron inelastic scattering reaction (n,n'-y). An experiment to study the pygmy resonance in 140Ce using the (n,n'-y) reaction has been performed in Septem-ber 2022. This experiment has been made possible thanks to the high-intensity proton beam of the new accelerator SPIRAL2 at GANIL and the NFS (Neutron For Science) facility. The experimental setup was composed of the new generation multi-detectors PARIS, for the detection of-y-rays coming from the de-excitation of the PDR, and MONSTER, for the detection of scattered neutrons. In this article, the experiment motivation and description are presented
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