Conversion of nuclear spin isomers of water molecules under ultracold conditions of space

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Conversion of nuclear spin isomers of water molecules under ultracold conditions of space. / Chapovsky, P. L.

In: Quantum Electronics, Vol. 49, No. 5, 01.01.2019, p. 473-478.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{7a15bf14afeb4736908ebf9d923358da,

title = "Conversion of nuclear spin isomers of water molecules under ultracold conditions of space",

abstract = "The conversion rate of nuclear spin isomers of water molecules in space is calculated using the model of quantum relaxation in the absence of particle collisions. The model is based on the intramolecular mixing of the ortho and para states of H2O by the spin-rotation interaction and on the interruption of the mixing by radiative transitions of a molecule in a thermal radiation field. The lifetime of water isomers at a thermal radiation temperature T = 50 K is ∼2 × 107 years, and at a temperature T = 100 K it is 3 × 106 years. The lifetimes of the spin isomers of water molecules are found to be large, but still smaller, for example, than the age of the Solar System. The proposed process of conversion of the spin isomers of water molecules is important for areas of space with low (n < 1 cm-3) particle concentrations.",

keywords = "interstellar space, ratio of ortho and para states of molecules in space, Solar System, spin isomers of water molecules, CHEMISTRY, DIFFUSION, TRANSITIONS",

author = "Chapovsky, {P. L.}",

note = "Publisher Copyright: {\textcopyright} 2019 Kvantovaya Elektronika, Turpion Ltd and IOP Publishing Ltd.",

year = "2019",

month = jan,

day = "1",

doi = "10.1070/QEL17006",

language = "English",

volume = "49",

pages = "473--478",

journal = "Quantum Electronics",

issn = "1063-7818",

publisher = "Turpion Ltd.",

number = "5",

}

RIS

TY - JOUR

T1 - Conversion of nuclear spin isomers of water molecules under ultracold conditions of space

AU - Chapovsky, P. L.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The conversion rate of nuclear spin isomers of water molecules in space is calculated using the model of quantum relaxation in the absence of particle collisions. The model is based on the intramolecular mixing of the ortho and para states of H2O by the spin-rotation interaction and on the interruption of the mixing by radiative transitions of a molecule in a thermal radiation field. The lifetime of water isomers at a thermal radiation temperature T = 50 K is ∼2 × 107 years, and at a temperature T = 100 K it is 3 × 106 years. The lifetimes of the spin isomers of water molecules are found to be large, but still smaller, for example, than the age of the Solar System. The proposed process of conversion of the spin isomers of water molecules is important for areas of space with low (n < 1 cm-3) particle concentrations.

AB - The conversion rate of nuclear spin isomers of water molecules in space is calculated using the model of quantum relaxation in the absence of particle collisions. The model is based on the intramolecular mixing of the ortho and para states of H2O by the spin-rotation interaction and on the interruption of the mixing by radiative transitions of a molecule in a thermal radiation field. The lifetime of water isomers at a thermal radiation temperature T = 50 K is ∼2 × 107 years, and at a temperature T = 100 K it is 3 × 106 years. The lifetimes of the spin isomers of water molecules are found to be large, but still smaller, for example, than the age of the Solar System. The proposed process of conversion of the spin isomers of water molecules is important for areas of space with low (n < 1 cm-3) particle concentrations.

KW - interstellar space

KW - ratio of ortho and para states of molecules in space

KW - Solar System

KW - spin isomers of water molecules

KW - CHEMISTRY

KW - DIFFUSION

KW - TRANSITIONS

UR - http://www.scopus.com/inward/record.url?scp=85067799556&partnerID=8YFLogxK

U2 - 10.1070/QEL17006

DO - 10.1070/QEL17006

M3 - Article

AN - SCOPUS:85067799556

VL - 49

SP - 473

EP - 478

JO - Quantum Electronics

JF - Quantum Electronics

SN - 1063-7818

IS - 5

ER -

ID: 20656259