THE BOND-LENGTH OF ZRAR+

The photodissociation spectrum of isolated ZrAr+ has been observed. Th e bond length in the vibrationless ground state is r(0) = 2.718 +/- 0. 01 Angstrom with Omega '' = 3/2. The c state of this ion has Omega' = 5/2, an electronic origin at T-00 = 15580 cm(-1), a vibrational freque ncy of omega(c) = 74.9 cm(-1) an anharmonicity of omega(c)x(c) = 1.15 cm(-1), an equilibrium rotational constant of B-c = 0.0655, and a rota tion-vibration constant of alpha(c) = 0.00154 cm(-1). The bond length of this excited state is r(0) = 3.050 +/- 0.01 Angstrom with a diabati c bond energy of 1170 +/- 20 cm(-1). Assignment of the c-X band conver gence places the adiabatic binding energy of ground state of ZrAr+ at D-0 = 2706 +/- 20 cm(-1) .