The SiRi particle-telescope system

Guttormsen, M.; Bürger, A.; Hansen, Thor-Erik; Lietaer, Nicolas

doi:10.1016/j.nima.2011.05.055

Cited by 99 publications

(93 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 12.5 MeV deuteron beam was used for the reactions 181 Ta(d,p) 182 Ta and 181 Ta(d,d ) 181 Ta. The SiRi particle telescope and CACTUS scintillator arrays where used to detect charged particles and γ -rays which were in coincidence with a 2 µs window [9,10].…”

Section: Methodsmentioning

confidence: 99%

Resonances in odd-odd¹⁸²Ta

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract. Enhanced γ -decay on the tail of the giant electric dipole resonance, such as the scissors or pygmy resonances, can have significant impact on (n,γ ) reaction rates. These rates are important input for modeling processes that take place in astrophysical environments and nuclear reactors. Recent results from the University of Oslo indicate the existence of a significant enhancement in the photon strength function for nuclei in the actinide region due to the scissors resonance. Further, the M1 strength distribution of the scissors resonances in rare earth nuclei has been studied extensively over the years. To investigate the evolution and persistence of the scissor resonance in other mass regions, an experiment was performed utilizing the NaI(Tl) γ -ray detector array (CACTUS) and silicon particle telescopes (SiRi) at the University of Oslo Cyclotron laboratory. Particle-γ coincidences from the 181 Ta(d,p) 182 Ta and 181 Ta(d,d') 181 Ta reactions were used to measure the nuclear level density and photon strength function of the well-deformed 181 Ta and 182 Ta systems, to investigate the existence of resonances below the neutron separation energy.

show abstract

Section: Methodsmentioning

confidence: 99%

Resonances in odd-odd¹⁸²Ta

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…A deuteron and a 3 He beams at 15 and 24 MeV energies, respectively, were impinged on a 99.5% isotopically pure 238 U target of 260 μg/cm 2 thickness, deposited on a 40 μg/cm 2 C layer. The experimental setup coupled the CAC-TUS [7] NaI(Tl) array for gamma detection, the NIFF PPAC [8] for fission fragment detection and the SiRi silicon telescope array [9] for the ejectile detection and identification. A detailed description of the setup and of the data analysis can be found in [10][11][12].…”

Section: Methodsmentioning

confidence: 99%

First simultaneous measurement of fission and gamma probabilities of²³⁷U and²³⁹Np via surrogate reactions

Marini¹,

Ducasse²,

Jurado³

et al. 2016

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

Abstract. Fission and gamma decay probabilities of 237 U and 239 Np have been measured, for the first time simultaneously in dedicated experiments, via the surrogate reactions 238 U( 3 He, 4 He) and 238 U( 3 He,d), respectively. While a good agreement between our data and neutron-induced data is found for fission probabilities, gamma decay probabilities are several times higher than the corresponding neutron-induced data for each studied nucleus. We study the role of the different spin distributions populated in the surrogate and neutron-induced reactions. The compound nucleus spin distribution populated in the surrogate reaction is extracted from the measured gamma-decay probabilities, and used as input parameter in the statistical model to predict fission probabilities to be compared to our data. A strong disagreement between our data and the prediction is obtained. Preliminary results from an additional dedicated experiment confirm the observed discrepancies, indicating the need of a better understanding of the formation and decay processes of the compound nucleus.

show abstract

“…The energy and angle relative to the beam axis of the charged particles emitted from the reactions were detected with the particle telescope system SiRi [10]. SiRi consists of thin Si-strips in the front and thick pads at the back providing separation between protons, deuterons and tritons.…”

Section: Methodsmentioning

confidence: 99%