The Spectra of Strontium Hydride

New SrH band systems photographed at high dispersion include: (1) an abbreviated

C {}^{2}Σ \to N {}^{2}Σ

system with (0,0) band head at 3808A, (2) a many-lined

D {}^{2}Σ \to N {}^{2}Σ

system between 5000A and 6700A, (3) an

E {}^{2}Π \to N {}^{2}Σ

system consisting of a

Δ v = 0

sequence only with the (0,0) band at 5323A. The (0,0) and (0,1)

C

bands have three violent perturbations and a sharp cut-off due to predissociation at

K^{'} = 19

. The form and magnitude of the perturbations are computed. Quantum analyses give

B_{0} = 3.930

and

D_{0} = - 9.31 \times 10^{- 4}

for the

C

state,

B_{1} = 3.56

for the normal state. Quantum assignments of the lines of the six principal branches of the (0,0) band of the

E

system are presented. For the

E

state

A = 117

{B^{*}}_{0, - \frac{1}{2}} = 3.6388

{B^{*}}_{0, + \frac{1}{2}} = 3.8687

and perturbations at small

J

values distort the

Λ

-doubling curve for the

{}^{2}Π_{\frac{1}{2}}

state.

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