Optical time projection chamber for imaging of two-proton decay of /sup 45/Fe nucleus

Ćwiok, M.; Dominik, W.; Janas, Z.; Korgul, A.; Miernik, K.; Pfützner, M.; Sawicka, M.; Wasilewski, A.

doi:10.1109/tns.2005.862796

Cited by 20 publications

(20 citation statements)

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“…Left: measured electroluminescence yield (Y ) in xenon (triangles) and argon (circles) as a function of the electric field, and comparison with simulations for all gases, after [98] (recent results from krypton can be found in [215]). Right: scintillation process in the presence of molecular additives, from [216]. A proportional scintillation regime followed by an exponential (avalanche-driven) one can be appreciated in both cases.…”

Section: Charge Detection (Ii Secondary Scintillation)mentioning

confidence: 97%

Gaseous and dual-phase time projection chambers for imaging rare processes

González-Díaz

Monrabal

Murphy

2018

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Charge Detection (Ii Secondary Scintillation)mentioning

confidence: 97%

Gaseous and dual-phase time projection chambers for imaging rare processes

González-Díaz

Monrabal

Murphy

2018

Nuclear Instruments and Methods in Physics Research Section A:

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“…two-body decay) rare events of known patterns in a low background environment. However, since its introduction over two decades ago, the O-TPC has had a limited use in Nuclear Research [11,12]. The O-TPC concept on the other hand appears well suited for experiments at gamma-ray facilities such as the HIγS at the Triangle Universities Nuclear Lab (TUNL) [13,14] as used in the present study with intense gamma-ray beams [15].…”

Section: Jinst 5 P12004mentioning

confidence: 99%

An optical readout TPC (O-TPC) for studies in nuclear astrophysics with gamma-ray beams at HIγS¹

et al. 2010

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We report on the construction, tests, calibrations and commissioning of an Optical Readout Time Projection Chamber (O-TPC) detector operating with a CO 2 (80%) + N 2 (20%) gas mixture at 100 and 150 Torr. It was designed to measure the cross sections of several key nuclear reactions involved in stellar evolution. In particular, a study of the rate of formation of oxygen and carbon during the process of helium burning will be performed by exposing the chamber gas to intense nearly mono-energetic gamma-ray beams at the High Intensity Gamma Source (HIγS) JINST 5 P12004facility. The O-TPC has a sensitive target-drift volume of 30x30x21 cm 3 . Ionization electrons drift towards a double parallel-grid avalanche multiplier, yielding charge multiplication and light emission. Avalanche-induced photons from N 2 emission are collected, intensified and recorded with a Charge Coupled Device (CCD) camera, providing two-dimensional track images. The event's time projection (third coordinate) and the deposited energy are recorded by photomultipliers and by the TPC charge-signal, respectively. A dedicated VME-based data acquisition system and associated data analysis tools were developed to record and analyze these data.The O-TPC has been tested and calibrated with 3.183 MeV alpha-particles emitted by a 148 Gd source placed within its volume with a measured energy resolution of 3.0%. Tracks of alpha and 12 C particles from the dissociation of 16 O and of three alpha-particles from the dissociation of 12 C have been measured during initial in-beam test experiments performed at the HIγS facility at Duke University. The full detection system and its performance are described and the results of the preliminary in-beam test experiments are reported.

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“…Nuclei beyond proton drip-line exhibit even more exotic phenomena. [5]. The first ground-state two-proton emitter -'*^Fe [2,3] -was observed in 2002.…”

Section: Introductionmentioning

confidence: 99%

Imaging nuclear decays with Optical Time Projection Chamber

Miernik

Dominik

Janas

et al. 2007

AIP Conference Proceedings

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On the alpha decay of 109 I and its implications for the proton decay of 105 Sb AIP Conf. Abstract.A novel type of gaseous ionization detector -Optical Time Proj ection Chamber (OTPC) -developed to study rare nuclear decays is presented. The OTPC records tracks of charged particles ionizing a counting gas by optical imaging of the light generated by electrons multiplied in the amplification structures. By combining an electron drift-time profile measured by a photomultiplier and a CCD camera image we reconstruct three-dimensional trajectories of particles, energies and charges. The capabilities of the OTPC detector to study various decay modes are demonstrated by observation of beta-delayed proton emission from ^^O, two-alpha break-up of ^Be, triple-alpha decay of ^^C excited states and two-proton radioactivity of ''^Fe.

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Optical time projection chamber for imaging of two-proton decay of /sup 45/Fe nucleus

Cited by 20 publications

References 7 publications

Gaseous and dual-phase time projection chambers for imaging rare processes

Gaseous and dual-phase time projection chambers for imaging rare processes

An optical readout TPC (O-TPC) for studies in nuclear astrophysics with gamma-ray beams at HIγS¹

Imaging nuclear decays with Optical Time Projection Chamber

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Optical time projection chamber for imaging of two-proton decay of /sup 45/Fe nucleus

Cited by 20 publications

References 7 publications

Gaseous and dual-phase time projection chambers for imaging rare processes

Gaseous and dual-phase time projection chambers for imaging rare processes

An optical readout TPC (O-TPC) for studies in nuclear astrophysics with gamma-ray beams at HIγS1

Imaging nuclear decays with Optical Time Projection Chamber

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An optical readout TPC (O-TPC) for studies in nuclear astrophysics with gamma-ray beams at HIγS¹