The SiRi Particle-Telescope System

Abstract

A silicon particle-telescope system for light-ion nuclear reactions is described. In particular, the system is designed to be optimized for level density and gamma-ray strength function measurements with the so-called Oslo method. Eight trapezoidal modules are mounted at 5 cm distance from the target, covering 8 forward angles between theta = 40 and 54 degrees. The thin front dE detectors (130 micrometer) are segmented into eight pads, determining the reaction angle for the outgoing charged ejectile. Guard rings on the thick back E detectors (1550 micrometer) guarantee low leakage current at high depletion voltage.

6 pages, 8 figures

References in corpus (4)

• Extraction of level density and gamma strength function from primary gamma spectra
• Evolution of the pygmy dipole resonance in Sn isotopes
• Nuclear level densities and gamma-ray strength functions in 44,45Sc
• Evidence for the pair-breaking process in 116,117Sn

Cited by in corpus (38)

• Evidence for dipole nature of the low-energy $\gamma$ enhancement in ${}^{56}$Fe
• Scissors resonance in the quasi-continuum of Th, Pa and U isotopes
• Novel Techniques for Constraining Neutron-Capture Rates Relevant for r-Process Heavy-Element Nucleosynthesis
• Observation of large scissors resonance strength in actinides
• Constant-temperature level densities in the quasi-continuum of Th and U isotopes
• Transitional $\gamma$ strength in Cd isotopes
• Experimental level densities of atomic nuclei
• Study of the 238U(d,p) surrogate reaction via the simultaneous measurement of gamma-decay and fission probabilities
• Low-energy enhancement in the γ-ray strength functions of ${}^{73,74}$Ge
• Independent Normalization for $\gamma$-ray Strength Functions: The Shape Method
• The radiative width of the Hoyle state from $\gamma$-ray spectroscopy
• Experimentally constrained ($p,\gamma$)${}^{89}$Y and ($n,\gamma$)${}^{89}$Y reaction rates relevant to the $p$-process nucleosynthesis
• Photoneutron cross sections for Ni isotopes: Toward understanding $(n,\gamma )$ cross sections relevant to the weak s-process nucleosynthesis
• Statistical properties of ${}^{243}$Pu, and ${}^{242}$Pu(n,$\gamma$) cross section calculation
• Low-energy enhancement and fluctuations of $\gamma$-ray strength functions in ${}^{56,57}$Fe: test of the Brink-Axel hypothesis
• ${}^{137,138,139}$La($n$, $\gamma$) cross sections constrained with statistical decay properties of ${}^{138,139,140}$La nuclei
• Quasicontinuum $\gamma$-decay of ${}^{91,92}$Zr: benchmarking indirect ($n,\gamma$) cross section measurements for the $s$-process
• The energy response of the Oslo Scintillator Array OSCAR
• Completing the nuclear reaction puzzle of the nucleosynthesis of 92Mo
• Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes
• Nuclear level densities and $\gamma$-ray strength functions in ${}^{120,124}$Sn isotopes: impact of Porter-Thomas fluctuations
• Level densities and thermodynamical properties of Pt and Au isotopes
• Nuclear level densities and gamma-ray strength functions of ${}^{180,181,182}$Ta
• Statistical properties of the well deformed ${}^{153,155}$Sm nuclei and the scissors resonance
• Shell-gap reduced level densities in ${}^{89,90}$Y
• First experimental constraint on the ${}^{191}$Os$(n,\gamma )$ reaction rate relevant to $s$-process nucleosynthesis
• Systematics of the low-energy electric dipole strength in the Sn isotopic chain
• Experimentally constrained ${}^{165,166}\text{Ho}(n,\gamma )$ rates and implications for the $s$ process
• Nuclear level densities and $\gamma -$ray strength functions of ${}^{111,112,113}$Sn isotopes studied with the Oslo method
• Restricted spin-range correction in the Oslo Method: The example of nuclear level density and $\gamma$-ray strength function from ${}^{239}\mathrm{Pu}(\mathrm{d},\mathrm{p}\gamma {)}^{240}\mathrm{Pu}$
• Energy dependence of the prompt $\gamma$-ray emission from the $(d,p)$-induced fission of ${}^{234}{\mathrm{U}}^{\ast }$ and ${}^{240}{\mathrm{Pu}}^{\ast }$
• New experimental constraint on the ${}^{185}$W($n,\gamma$)${}^{186}$W cross section
• Indirect measurement of the $(n,\gamma {)}^{127}$Sb cross section
• Semi-classical kinetic theory for massive spin-half fermions with leading-order spin effects
• Application of the EXtrapolated Efficiency Method (EXEM) to infer the gamma-cascade detection efficiency in the actinide region
• Impact of restricted spin-ranges in the Oslo Method: The example of (d,p)${}^{240}\mathrm{Pu}$
• Gamma-widths, lifetimes and fluctuations in the nuclear quasi-continuum
• Comprehensive test of the Brink-Axel hypothesis in the energy region of the pygmy dipole resonance