TY - JOUR
T1 - Terahertz spectroscopy of CaH
AU - Furuta, Jin
AU - Kobayashi, Kaori
AU - Matsushima, Fusakazu
AU - Moriwaki, Yoshiki
AU - Ozeki, Hiroyuki
AU - Ross, Stephen C.
N1 - Publisher Copyright:
© 2025 The Authors
PY - 2025/6/16
Y1 - 2025/6/16
N2 - Calcium monohydride, CaH, has been a molecule of astrophysical interest ever since its first identification in sunspots. For astrophysical use it is therefore important to provide rest frequencies in the terahertz range. We observed pure rotational transitions for the υ = 0, and υ = 1 levels. This is the first report of pure rotational spectra of the υ = 1 level. We also performed a global fitting of the effective molecular constants for the υ = 0 to υ = 4 levels of the electronic ground state along with infrared transitions from previous studies.
AB - Calcium monohydride, CaH, has been a molecule of astrophysical interest ever since its first identification in sunspots. For astrophysical use it is therefore important to provide rest frequencies in the terahertz range. We observed pure rotational transitions for the υ = 0, and υ = 1 levels. This is the first report of pure rotational spectra of the υ = 1 level. We also performed a global fitting of the effective molecular constants for the υ = 0 to υ = 4 levels of the electronic ground state along with infrared transitions from previous studies.
KW - CaH
KW - Microwave spectroscopy
KW - Pure rotational transitions
KW - Rotational spectroscopy
KW - Terahertz spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=105000493393&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2025.142019
DO - 10.1016/j.cplett.2025.142019
M3 - 学術論文
AN - SCOPUS:105000493393
SN - 0009-2614
VL - 869
JO - Chemical Physics Letters
JF - Chemical Physics Letters
M1 - 142019
ER -