Absolute cliffereuti.al c:roae sections for the elastic scattering of alpha particles floom helium have been obtained at 36.8, 38.8, 40.8, 41.9, 44.4, 4:6.1, 47.1, and 47.3 m cr

A gamma ray of energy 15.2 Mev has been observed with a 180° pair spectrometer in the bombardment of carbon by protons of energy 30-340 Mev. The line is also seen in deuteron bombardment of B 11 , but not of B 10 ; These facts, along with energetics arguments and clear spectrometer separation from known lines in excited Be 8 , strongly indicate an excited C 12 origin for the line. It is tentatively proposed that the excited C 12 level here involved is a T~l state for which isotopic spin selection rules forbid a disintegration into three alpha particles.

I I I 4y-tea. * U m , M k lt aa4 U r tk it h i-alagla >r«tW M lM » M l l i l t M , l«4 M i l t i P H tn |MM4 M M M M M l pktMMMlnlMl M tlM C M elM U tM tU tM. TIm »»m-i l o l c i l t t M l m t la 41m m n 4 La DO) , Kurattaofla a-a d) ■ y t o t w iM lM * la ta ra o tia a k |