Naslov
Electron capture and scaling anomaly in polar molecules

Autori
Pulak Ranjan, Giri ; Kumar, S. Gupta ; Meljanac, Stjepan ; Samsarov, Andjelo

Izvornik
Physics Letters A (0375-9601) 372 (2008), 17; 2967-2970

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
self-adjoint extension; quantum mechanical anomaly

Sažetak
We present a new analysis of the electron capture mechanism in polar molecules, based on von Neumann's theory of self-adjoint extensions. Our analysis suggests that it is theoretically possible for polar molecules to form bound states with electrons, even with dipole moments smaller than the critical value D_0 given by 1.63\times10^{; ; ; ; ; ; -18}; ; ; ; ; ; esu cm. This prediction is consistent with the observed anomalous electron scattering in H_2S and HCl, whose dipole moments are smaller than the critical value D_0. We also show that for a polar molecule with dipole moment less than D_0, typically there is only a single bound state, which is in qualitative agreement with observations. We argue that the quantum mechanical scaling anomaly is responsible for the formation of these bound states.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA