The Scattering Experiments Chamber (SEC) experiment is a permanent experimental setup located in the ISOLDE facility at

CERN The European Organization for Nuclear Research, known as CERN (; ; ), is an intergovernmental organization that operates the largest particle physics laboratory in the world. Established in 1954, it is based in Meyrin, western suburb of Gene ...

. The station facilitates diversified reaction experiments, especially for studying low-lying

resonances Resonance is a phenomenon that occurs when an object or system is subjected to an external force or vibration whose frequency matches a resonant frequency (or resonance frequency) of the system, defined as a frequency that generates a maximu ...

in light

atomic nuclei The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford at the University of Manchester based on the 1909 Geiger–Marsden gold foil experiment. Aft ...

via transfer reactions. SEC does not detect

gamma radiation A gamma ray, also known as gamma radiation (symbol ), is a penetrating form of electromagnetic radiation arising from high energy interactions like the radioactive decay of atomic nuclei or astronomical events like solar flares. It consists o ...

, and therefore is complementary to the ISOLDE Solenoidal Spectrometer (ISS) and

Miniball The Miniball experiment is a gamma-ray spectroscopy setup regularly located in the ISOLDE facility at CERN, along with other locations including GSI, Cologne, PSI and RIKEN (HiCARI). Miniball is a high-resolution germanium detector array, specifi ...

experiments.

Experimental setup

The SEC experiment uses radioactive ion beams from ISOLDE, at the end of XT03 beamline of the HIE-ISOLDE facility. The ion beam first passes through a collimator, of 15 mm aperture, surrounded by 4 silicon detectors, designed for beam optimisation. The SEC chamber has a diameter of 1 m and height of 50 cm, with the reaction target placed in the centre on a motorised target holder. The target holder has the space for four targets, and each target can be moved in place via remote control. The reaction target is surrounded by double-sided silicon strip detectors (DSSSD) which are positioned so that the angular coverage is optimised, depending on the experiment. DSSSDs allow for efficient detection of all emitted particles in the reaction. The main support for the detector is a circular movable table which has radially arranged holes at the centre. SEC_experiment

GLORIA

GLORIA (GLObal ReactIon Array) is a configuration used in SEC to measure fragments produced in reactions. It consists of six silicon telescopes, which surround a certain scattering angle of the reaction target (from 15° to 160°. GLORIA was designed to have a compact geometry with the ability to resolve mass and ion charge up to carbon isotopes, due to the two-stage DSSD telescopes.

SAND

The SAND array is used at the scattering chamber SEC, for the detection of charged particles and neutrons. The array consists of 30 modules, each being a plastic scintillator with fast photomultiplier tubes. The array can be moved to bring it closer to the target.{{Cite journal , last1=Borge , first1=M J G , last2=Briz , first2=J A , last3=Cederkall , first3=J , last4=De Angelis , first4=G , last5=Figuera , first5=P P , last6=Fraile , first6=L M , last7=Fynbo , first7=H O U , last8=Gad , first8=A , last9=Heinz , first9=A , last10=Holl , first10=M , last11=Jensen , first11=E , last12=Johansen , first12=J G , last13=Johansson , first13=H T , last14=Jonson , first14=B , last15=Martel , first15=I , display-authors=14 , date=6 Jan 2021 , title=Reaction studies with neutron-rich light nuclei at the upgraded SEC Device , url=https://cds.cern.ch/record/2748710/files/INTC-P-597.pdf , journal=Proposal to the ISOLDE and Neutron Time-of-Flight Committee

External links

SEC page on ISOLDE website

SEC website

References

CERN experiments