dorsal/arxiv
View SchemaA supersonic beam of cold lithium hydride molecules
| Authors | S. K. Tokunaga, J. O. Stack, J. J. Hudson, B. E. Sauer, E. A. Hinds, M. R. Tarbutt |
|---|---|
| Categories | |
| ArXiv ID | physics/0612163 |
| URL | https://arxiv.org/abs/physics/0612163 |
| DOI | 10.1063/1.2711434 |
| Journal | J. Chem. Phys. 126, 124314 (2007) |
Abstract
We have developed a source of cold LiH molecules for Stark deceleration and trapping experiments. Lithium metal is ablated from a solid target into a supersonically expanding carrier gas. The translational, rotational and vibrational temperatures are 0.9(0.1) K, 5.9(0.5) K and 468(17) K respectively. Although they have not reached thermal equilibrium with the carrier gas, we estimate that 90% of the LiH molecules are in the ground state, X^{1} \Sigma^{+} (v=0, J=0). With a single 7 ns ablation pulse, the number of molecules in the ground state is 4.5(1.8)*10^{7} molecules per steradian. A second, delayed, ablation pulse produces another LiH beam in a different part of the same gas pulse, thereby almost doubling the signal. A long pulse, lasting 150 microseconds, can make the beam up to 15 times more intense.
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"abstract": "We have developed a source of cold LiH molecules for Stark deceleration and\ntrapping experiments. Lithium metal is ablated from a solid target into a\nsupersonically expanding carrier gas. The translational, rotational and\nvibrational temperatures are 0.9(0.1) K, 5.9(0.5) K and 468(17) K respectively.\nAlthough they have not reached thermal equilibrium with the carrier gas, we\nestimate that 90% of the LiH molecules are in the ground state, X^{1}\n\\Sigma^{+} (v=0, J=0). With a single 7 ns ablation pulse, the number of\nmolecules in the ground state is 4.5(1.8)*10^{7} molecules per steradian. A\nsecond, delayed, ablation pulse produces another LiH beam in a different part\nof the same gas pulse, thereby almost doubling the signal. A long pulse,\nlasting 150 microseconds, can make the beam up to 15 times more intense.",
"arxiv_id": "physics/0612163",
"authors": [
"S. K. Tokunaga",
"J. O. Stack",
"J. J. Hudson",
"B. E. Sauer",
"E. A. Hinds",
"M. R. Tarbutt"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1063/1.2711434",
"journal_ref": "J. Chem. Phys. 126, 124314 (2007)",
"title": "A supersonic beam of cold lithium hydride molecules",
"url": "https://arxiv.org/abs/physics/0612163"
},
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