Spin parity of the 7.478 MeV state of B-10 and the S factor of the Be-9((p)over-right-arrow,gamma(0))B-10 reaction

Polarized protons were used to measure the analyzing power of the Be-9((p) over right arrow,gamma)B-10 reaction for E-p = 280-0 keV. The analyzing pow er for the ground stare transition compared to calculations leads to a spin -parity assignment of 2(+) for the 7.478 MeV state of B-10. This 2(+) assig nment is consistent with other observables for this reaction and is predict ed by cluster and shell model calculations. It is found that the 2(+) assig nment leads to a value for the astrophysical S factor for capture to the gr ound state of B-10 of S(0) = 0.20 keV b which is about 40% smaller than tha t obtained with a 2(-) assignment. [S0556-2813(99)01706-9].