A TEST OF ISOTOPIC SPIN CONSERVATION IN STRONG INTERACTIONS FROM AN EXPERIMENTAL LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$) (thesis)
The reaction d + d yields He/sup 4/ + 4pi/sup 0/, which is forbidden by isotopic spin conservation, was looked for at the Berkeley 184-inch cyclotron. A beam of deuterons of 460-Mev kinetic energy was scattered from an extended target filled with deuterium gas at a pressure of 390 psi (abs) and at liquid N temperature. The differential cross section in the center-of-mass system at about THETA /sub c.m./ = 90 deg was measured and an upper limit of 1.5 x 10/sup - 34/ cm/sup 2//sr was obtained. The data are consistent with no pi /sup 0/ production. From a comparison of this upper limit with the theoretical prediction of the cross section for this reaction if isotopic spin need not be conserved, it is concluded that isotopic spin is at least 99.6% conserved in strong interactions. The reaction d + d yields He/sup 4/ + gamma was also looked for and an upper limit for the differential cross section in the centerof- mass system at THETA /sub c.m./= 65 deg of 3.5 x 10/sup -34/ cm/sup 2//sr was obtained. The data are consistent with no gamma production. (auth)
- Research Organization:
- California. Univ., Berkeley. Lawrence Radiation Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-16-029663
- OSTI ID:
- 4789793
- Report Number(s):
- UCRL-10290
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- United States
- Language:
- English
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TEST OF ISOTOPIC SPIN CONSERVATION IN STRONG INTERACTIONS FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$)
TEST OF ISOTOPIC SPIN CONSERVATION FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$)