TY - JOUR

T1 - Enhancement of the sensitivity of the light-induced drift effect to interatomic interaction potentials using a mixture of two buffer gases

AU - Parkhomenko, A. I.

AU - Shalagin, A. M.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Based on five different nonempirical (calculated ab initio) interaction potentials for pairs of colliding Li-Ne particles and three different interaction potentials for pairs of colliding Li-Ar particles, we have theoretically investigated the spectral features of the light-induced drift (LID) rate of Li atoms in the buffer Ne gas in a mixture of buffer Ne + Ar gases. The calculations of LID of Li atoms in the buffer Ne gas for two interaction potentials predict anomalous LID and, as a result, strong sensitivity of the spectral shape of the LID lines to the differences in these potentials. For three other potentials (out of the five in question), the shape of the LID line of Li atoms in Ne is insensitive to the shape of the potential, since calculations with these potentials predict a normal LID effect. In this case, as it turned out, by adding a small fraction (approximately 10%) of Ar to Ne, one can go from normal LID to anomalous LID and thereby radically increase the sensitivity of the LID line shape of Li atoms to the difference in these interaction potentials. The results obtained enable high-precision testing of the interatomic interaction potentials in experiments on anomalous LID.

AB - Based on five different nonempirical (calculated ab initio) interaction potentials for pairs of colliding Li-Ne particles and three different interaction potentials for pairs of colliding Li-Ar particles, we have theoretically investigated the spectral features of the light-induced drift (LID) rate of Li atoms in the buffer Ne gas in a mixture of buffer Ne + Ar gases. The calculations of LID of Li atoms in the buffer Ne gas for two interaction potentials predict anomalous LID and, as a result, strong sensitivity of the spectral shape of the LID lines to the differences in these potentials. For three other potentials (out of the five in question), the shape of the LID line of Li atoms in Ne is insensitive to the shape of the potential, since calculations with these potentials predict a normal LID effect. In this case, as it turned out, by adding a small fraction (approximately 10%) of Ar to Ne, one can go from normal LID to anomalous LID and thereby radically increase the sensitivity of the LID line shape of Li atoms to the difference in these interaction potentials. The results obtained enable high-precision testing of the interatomic interaction potentials in experiments on anomalous LID.

KW - Buffer gas

KW - Collisions

KW - Interatomic interaction potential

KW - Light-induced drift

KW - Optical excitation

UR - http://www.scopus.com/inward/record.url?scp=85071719649&partnerID=8YFLogxK

U2 - 10.1070/QEL16856

DO - 10.1070/QEL16856

M3 - Article

AN - SCOPUS:85071719649

VL - 49

SP - 683

EP - 688

JO - Quantum Electronics

JF - Quantum Electronics

SN - 1063-7818

IS - 7

ER -