Sulfur and selenium isotope separation by distillation

Mills, T. R.; McInteer, B.B.; Montoya, J.G.

doi:10.1016/0883-2889(88)90365-6

Cited by 2 publications

(2 citation statements)

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“…Enrichment of 82 Se is commonly achieved by centrifugation of gaseous selenium hexafluoride (SeF 6 ), an inefficient process that would dominate the cost of the demonstrator. A more attractive approach is isotopic enrichment by cryogenic distillation of hydrogen selenide (H 2 Se), for which a hint of isotopic separation of 82 Se was observed with a meter-long column [29]. We will explore this possibility as part of the Selena program.…”

Section: The Selena 100 Kg Demonstratormentioning

confidence: 99%

The Selena Neutrino Experiment

Chavarría

2021

J. Phys.: Conf. Ser.

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Imaging sensors made from an ionization target layer of amorphous selenium (aSe) coupled to a silicon complementary metal-oxide-semiconductor (CMOS) active pixel array for charge readout are a promising technology for neutrino physics. The high spatial resolution in a solid-state target provides unparalleled rejection of backgrounds from natural radioactivity in the search for neutrinoless ββ decay and for solar neutrino spectroscopy with 82Se. We present results on the ionization response of aSe measured from the photoabsorption of 122 keV γ rays in a single-pixel device. We report on the progress in the fabrication and testing of the first prototype imaging sensors based on the Topmetal II − pixelated CMOS charge readout chip. We explore the scientific reach of a large neutrino detector with the proposed technology based on our experimental understanding of the sensor performance.

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Section: The Selena 100 Kg Demonstratormentioning

confidence: 99%

The Selena Neutrino Experiment

Chavarría

2021

J. Phys.: Conf. Ser.

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“…The high Q ββ leads to a favorable phase-space factor and is significantly above most interfering γ-ray lines from the uranium and thorium decay chains of natural radioactivity, while the long T 2ν 1/2 leads to a small contribution of two-neutrino double electron events near Q ββ . In addition, selenium can form a wide variety of gases that allow for isotopic enrichment by centrifugation [14] or, potentially, at larger scales by distillation [15].…”

Section: Conceptual Designmentioning

confidence: 99%

A high-resolution CMOS imaging detector for the search of neutrinoless double β decay in⁸²Se

Chavarría

Galbiati

et al. 2017

J. Inst.

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A: We introduce high-resolution solid-state imaging detectors for the search of neutrinoless double β decay. Based on the present literature, imaging devices from amorphous 82 Se evaporated on a complementary metal-oxide-semiconductor (CMOS) active pixel array could have the energy and spatial resolution to produce two-dimensional images of ionizing tracks of utmost quality, effectively akin to an electronic bubble chamber in the double β decay energy regime. Still to be experimentally demonstrated, a detector consisting of a large array of these devices could have very low backgrounds, possibly reaching 1 × 10 −7 /(kg y) in the neutrinoless decay region of interest (ROI), as it may be required for the full exploration of the neutrinoless double β decay parameter space in the most unfavorable condition of a strongly quenched nucleon axial coupling constant. K: Double-beta decay detectors, Particle tracking detectors (Solid-state detectors), Solid state detectors.

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Sulfur and selenium isotope separation by distillation

Cited by 2 publications

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The Selena Neutrino Experiment

The Selena Neutrino Experiment

A high-resolution CMOS imaging detector for the search of neutrinoless double β decay in⁸²Se

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Sulfur and selenium isotope separation by distillation

Cited by 2 publications

References 0 publications

The Selena Neutrino Experiment

The Selena Neutrino Experiment

A high-resolution CMOS imaging detector for the search of neutrinoless double β decay in82Se

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A high-resolution CMOS imaging detector for the search of neutrinoless double β decay in⁸²Se