TY - JOUR
T1 - Positronium binding to potassium and other alkali atoms
AU - Mitroy, J.
AU - Ryzhikh, G.
PY - 1999/8/14
Y1 - 1999/8/14
N2 - The fixed-core stochastic variational method has been used to demonstrate the existence of an electronically stable ground state for potassium positride, KPs, with a binding energy of 0.003 275 Hartree. The 2γ annihilation rate of 2.001 × 109 s-1 was almost the same as the annihilation rates computed previously for LiPs and NaPs. Analysis of the radial expectation values, the annihilation rates and the e--e+ correlation function reveal that KPs can be regarded as a Ps cluster moving in the field of the neutral atom.
AB - The fixed-core stochastic variational method has been used to demonstrate the existence of an electronically stable ground state for potassium positride, KPs, with a binding energy of 0.003 275 Hartree. The 2γ annihilation rate of 2.001 × 109 s-1 was almost the same as the annihilation rates computed previously for LiPs and NaPs. Analysis of the radial expectation values, the annihilation rates and the e--e+ correlation function reveal that KPs can be regarded as a Ps cluster moving in the field of the neutral atom.
UR - http://www.scopus.com/inward/record.url?scp=0032635323&partnerID=8YFLogxK
U2 - 10.1088/0953-4075/32/15/314
DO - 10.1088/0953-4075/32/15/314
M3 - Article
SN - 0953-4075
VL - 32
SP - 3839
EP - 3848
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
IS - 15
ER -