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Condensed Matter > Other Condensed Matter

arXiv:1605.00694 (cond-mat)
[Submitted on 2 May 2016 (v1), last revised 7 Jul 2016 (this version, v2)]

Title:Calorimetric observation of single He2* excimers in a 100 mK He bath

Authors:F. W. Carter, S. A. Hertel, M. J. Rooks, P. V. E. McClintock, D. N. McKinsey, D. E. Prober
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Abstract:We report the first calorimetric detection of individual He2* excimers within a bath of superfluid 4He. The detector used in this work is a single superconducting titanium transition edge sensor (TES) with an energy resolution of ~1 eV, immersed directly in the helium bath. He2* excimers are produced in the surrounding bath using an external gamma-ray source. These excimers exist either as short-lived singlet or long-lived triplet states. We demonstrate detection of both states: in the singlet case the calorimeter records the absorption of a prompt 15 eV photon, and in the triplet case the calorimeter records a direct interaction of the molecule with the TES surface, which deposits a distinct fraction of the 15 eV, released upon decay, into the surface. We also briefly discuss the detector fabrication and characterization.
Comments: 7 pages, 10 figures
Subjects: Other Condensed Matter (cond-mat.other); Instrumentation and Detectors (physics.ins-det)
Cite as: arXiv:1605.00694 [cond-mat.other]
  (or arXiv:1605.00694v2 [cond-mat.other] for this version)
  https://doi.org/10.48550/arXiv.1605.00694
Related DOI: https://doi.org/10.1007/s10909-016-1666-x

Submission history

From: Faustin Carter [view email]
[v1] Mon, 2 May 2016 21:36:01 UTC (5,770 KB)
[v2] Thu, 7 Jul 2016 22:49:13 UTC (5,780 KB)
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