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  2. Helium hydride ion - Wikipedia

    en.wikipedia.org/wiki/Helium_hydride_ion

    Unlike the helium hydride ion, the neutral helium hydride molecule HeH is not stable in the ground state. However, it does exist in an excited state as an excimer (HeH*), and its spectrum was first observed in the mid-1980s. [19] [20] [21] The neutral molecule is the first entry in the Gmelin database. [4]

  3. Helium compounds - Wikipedia

    en.wikipedia.org/wiki/Helium_compounds

    The helium hydride ion HeH + has been known since 1925. [70] The protonated dihelium ion He 2 H + can be formed when the dihelium cation reacts with dihydrogen: He + 2 + H 2 → He 2 H + + H. This is believed to be a linear molecule. [70] Larger protonated helium cluster ions exist He n H + with n from 3 to 14. He 6 H + and He 13 H + appear to ...

  4. Trihydrogen cation - Wikipedia

    en.wikipedia.org/wiki/Trihydrogen_cation

    Since Oka's initial spectrum, [6] ... there is plenty of radiation to pump the H + 3 to higher energy states from which it can relax ... H + 2; Helium hydride ion ...

  5. Selected-ion flow-tube mass spectrometry - Wikipedia

    en.wikipedia.org/wiki/Selected-ion_flow-tube...

    In the selected ion flow tube mass spectrometer, SIFT-MS, ions are generated in a microwave plasma ion source, usually from a mixture of laboratory air and water vapor. . From the formed plasma, a single ionic species is selected using a quadrupole mass filter to act as "precursor ions" (also frequently referred to as primary or reagent ions in SIFT-MS and other processes involving chemical ...

  6. List of interstellar and circumstellar molecules - Wikipedia

    en.wikipedia.org/wiki/List_of_interstellar_and...

    Helium hydride ion [36] [37] 5: HeH + H 2: Molecular hydrogen [5] 2 — HCl: Hydrogen chloride [38] 36.5: HCl + [39] HF: Hydrogen fluoride [40] 20 — HO: Hydroxyl radical [34] 17: OH + [41] KCl: Potassium chloride [16] 75.5 — NH: Imidogen radical [42] [43] 15 — N 2: Molecular nitrogen [44] [45] 28 — NO: Nitric oxide [46] 30: NO + [29] NS ...

  7. Variational quantum eigensolver - Wikipedia

    en.wikipedia.org/wiki/Variational_quantum_eigen...

    As of 2022, the variational quantum eigensolver can only simulate small molecules like the helium hydride ion [1] or the beryllium hydride molecule. [11] Larger molecules can be simulated by taking into account symmetry considerations. In 2020, a 12-qubit simulation of a hydrogen chain (H 12) was demonstrated using Google's Sycamore quantum ...

  8. US manufacturing contraction slows in November, outlook uncertain

    www.aol.com/news/us-manufacturing-improves...

    The Atlanta Fed upgraded its gross domestic product growth estimate for the fourth quarter to a 3.2% annualized rate from a 2.7% pace earlier. The economy grew at a 2.8% rate in the third quarter.

  9. NGC 7027 - Wikipedia

    en.wikipedia.org/wiki/NGC_7027

    The helium hydride ion, thought to be the earliest molecule to have been formed in the Universe (about 100,000 years after the Big Bang), was detected in 2019 for the first time in space in NGC 7027. [ 21 ] [ 22 ] There is also evidence for the presence of nanodiamond in NGC 7027.

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