Abstract
Using a variational method with an explicitly correlated Gaussian basis, we study the e+-Li and e+-Be complexes in the ground and lowest excited states with higher spin multiplicity. Our calculations provide rigorous theoretical confirmation that a positron can be attached to the excited states: 1s2s2p Po4 and 1s22s2p Po3 for e+-Li and e+-Be, respectively. The result is particularly notable for the e+-Be complex, as the excited Po3 state lies below the autoionization threshold. We report accurate binding energies, annihilation rates and structural properties of these positron-atom systems. The existence of the ground and metastable excited states with bound positron opens up a new route to the presently lacking experimental verification of stability of a positron binding to any neutral atom.
| Original language | English |
|---|---|
| Article number | 193401 |
| Journal | Physical Review Letters |
| Volume | 111 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - Nov 4 2013 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Excited states of positronic lithium and beryllium. / Bubin, Sergiy; Prezhdo, Oleg V.
In: Physical Review Letters, Vol. 111, No. 19, 193401, 04.11.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Excited states of positronic lithium and beryllium
AU - Bubin, Sergiy
AU - Prezhdo, Oleg V.
PY - 2013/11/4
Y1 - 2013/11/4
N2 - Using a variational method with an explicitly correlated Gaussian basis, we study the e+-Li and e+-Be complexes in the ground and lowest excited states with higher spin multiplicity. Our calculations provide rigorous theoretical confirmation that a positron can be attached to the excited states: 1s2s2p Po4 and 1s22s2p Po3 for e+-Li and e+-Be, respectively. The result is particularly notable for the e+-Be complex, as the excited Po3 state lies below the autoionization threshold. We report accurate binding energies, annihilation rates and structural properties of these positron-atom systems. The existence of the ground and metastable excited states with bound positron opens up a new route to the presently lacking experimental verification of stability of a positron binding to any neutral atom.
AB - Using a variational method with an explicitly correlated Gaussian basis, we study the e+-Li and e+-Be complexes in the ground and lowest excited states with higher spin multiplicity. Our calculations provide rigorous theoretical confirmation that a positron can be attached to the excited states: 1s2s2p Po4 and 1s22s2p Po3 for e+-Li and e+-Be, respectively. The result is particularly notable for the e+-Be complex, as the excited Po3 state lies below the autoionization threshold. We report accurate binding energies, annihilation rates and structural properties of these positron-atom systems. The existence of the ground and metastable excited states with bound positron opens up a new route to the presently lacking experimental verification of stability of a positron binding to any neutral atom.
UR - http://www.scopus.com/inward/record.url?scp=84887064025&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84887064025&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.111.193401
DO - 10.1103/PhysRevLett.111.193401
M3 - Article
VL - 111
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 19
M1 - 193401
ER -