The 3410 Å band of the PH molecule in the solar photospheric spectrum

✍ Scribed by Elisabeth M. Gouveia; P. D. Singh

• Publisher: Springer
• Year: 1984
• Tongue: English
• Weight: 560 KB
• Volume: 90
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00173954

✦ Synopsis

Some weak unidentified solar photospheric lines in the wavelength range: (3400-3465) ~ may be due to PH lines of the (0, 0) band of the PH(A3//~ -X 3 Z-) system. These faint PH molecular lines have resulted an excitation temperature of the order of 4500 K. Using experimental lifetime data for PH in the A3//t state, an absorption oscillator strength foo = 0.0075 is derived for the 3410 ~ band of the PH (A3II~ -X 3 Z-) system. Accurate line positions, oscillator strength and transition probability for the 4.4/~ fundamental rotation-vibration band of the PH molecule are obtained. A comparison of positions of some lines of the 4.4# band with those obtained on new tracings of high resolution solar spectra shows many coincidences with weak solar lines.