Abstract: 546 HERITABILITY OF ULTRASONIC MEASUREMENTS OF SUBCLINICAL ATHEROSCLEROSIS

Abstract

The near-infrared spectrum of the chemiluminescence from the reaction of microwave-discharged nitrogen with bismuth vapor in a fast-flow system has been investigated by high-resolution Fourier-transform spectrometry. In addition to the a3Σ+(a11) → X1Σ+(X0+) system previously identified in LIF studies, two new band systems of BiN have been observed, which are assigned to the transitions b5Σ+(b10+) → X1Σ+(X0+) and b5Σ+(b10+) → a3Σ+(a11). Vibrational and rotational analyses of the bands yielded the following molecular constants of the X0+, a11, and b10+ states (in cm−1): for X0+ (v = 0-11): ωe = 736.570(3), ωexe = 4.829(1), ωeye = −0.0187(2), ωeze = −0.000403(5), Be = 0.343100(2), αB = −2.526(2)E − 3, βB = −1.29(3)E − 5, γB = −5.4(2)E − 7, De = 2.984(3)E − 7, αD = 3.3(1)E − 9, βD = 1.8(1)E − 10; for a11 (v = 0-2), Te = 10144.625, ωe = 501.647, ωeXe = 4.684, Be = 0.283773, αB = −2.86E − 3, βB = −1.7E − 5, De = 3.653E − 7, αD = 6.6E − 9, qe ∼ qv = 1.168E − 4, qDe ∼ qDv = 1.15E − 9; for b10+ (v = 0), T0 = 16242.569, ΔG1/2 = 314.723, ΔG3/2 = 294.998, ΔG5/2 = 283.033, B0 = 0.251085(1), D0 = 6.69E − 7, H0 = 5.07E − 12, where the numbers in parentheses give the standard deviations of the parameters in units of the last digit. The vibrational levels v = 1, 2, and 3 of b10+ are perturbed. From the Ω-doubling constant qe and the rotational constant Be of state a11, the spin-spin splitting of a3Σ+ is estimated to be ≍ 2720 cm−1. Weak magnetic hyperfine splitting of the rotational levels of a11 shows up by line broadening of low-J lines in the a1 → X and b1 → a1 bands.