We present the first laboratory measurements of the hyperfine structure of the J=1-0 rotational transition of N2D+, a good tracer of the dense regions of molecular cloud cores, and the spectra of unresolved high J transitions recorded in the 308-463 GHz region. Together with a high sensitivity radio-astronomical spectrum of the J=1-0 rotational transition in a quiescent cloud core, we determined with high precision the frequencies of the seven hyperfine components and the molecular spectroscopic constants, allowing us to make predictions on the frequencies of higher J transitions occurring in the submillimeter-wave region.
L. Dore, P. Caselli, S. Beninati, T. Bourke, P. C. Myers, G. Cazzoli (2004). Laboratory and radio-astronomical spectroscopy of the hyperfine structure of N2D+. ASTRONOMY & ASTROPHYSICS, 413, 1177-1181 [10.1051/0004-6361:20034025].
Laboratory and radio-astronomical spectroscopy of the hyperfine structure of N2D+
DORE, LUCA;BENINATI, SABINA;CAZZOLI, GABRIELE
2004
Abstract
We present the first laboratory measurements of the hyperfine structure of the J=1-0 rotational transition of N2D+, a good tracer of the dense regions of molecular cloud cores, and the spectra of unresolved high J transitions recorded in the 308-463 GHz region. Together with a high sensitivity radio-astronomical spectrum of the J=1-0 rotational transition in a quiescent cloud core, we determined with high precision the frequencies of the seven hyperfine components and the molecular spectroscopic constants, allowing us to make predictions on the frequencies of higher J transitions occurring in the submillimeter-wave region.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
