TY - JOUR
T1 - Spontaneous radiative dissociation of the second bound state of positronium hydride
AU - Yamashita, Takuma
AU - Hiyama, Emiko
AU - Yoshida, Daisuke
AU - Tachikawa, Masanori
N1 - Funding Information:
This work was financially supported by JSPS KAKENHI for Grants No. 18H05407, No. JP20K14381, and No. JP21H00115. The computation was conducted on the supercomputers ITO at Kyushu University, FLOW at Nagoya University, and HOKUSAI at RIKEN.
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/1
Y1 - 2022/1
N2 - The spontaneous radiative dissociation spectrum of the second bound state of positronium hydride (PsH) located just below the H(2p)+Ps(2p) threshold energy is investigated by the variational and complex coordinate rotation methods. Convergence of the transition rates is examined in both length and velocity gauges. The spectrum indicates that the primary channel of radiative dissociation is the transition into the continuum of H(1s)+Ps(2p), and the secondary one is that into the H(2p)+Ps(1s) continuum. Radiative transition to the resonance state located close to the second bound state is found to exist. The total rate of the radiative dissociation is found to be 9.1(2)×108s-1.
AB - The spontaneous radiative dissociation spectrum of the second bound state of positronium hydride (PsH) located just below the H(2p)+Ps(2p) threshold energy is investigated by the variational and complex coordinate rotation methods. Convergence of the transition rates is examined in both length and velocity gauges. The spectrum indicates that the primary channel of radiative dissociation is the transition into the continuum of H(1s)+Ps(2p), and the secondary one is that into the H(2p)+Ps(1s) continuum. Radiative transition to the resonance state located close to the second bound state is found to exist. The total rate of the radiative dissociation is found to be 9.1(2)×108s-1.
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U2 - 10.1103/PhysRevA.105.012814
DO - 10.1103/PhysRevA.105.012814
M3 - Article
AN - SCOPUS:85123599614
SN - 1050-2947
VL - 105
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 1
M1 - A16
ER -