TEST OF ISOTOPIC SPIN CONSERVATION FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$)
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
The reaction d + d yields He/sup 4/ + pi /sup o/, which is forbidden by isotopic spin conservation is sought. A beam of deuterons at 460 Mev is scattered from an extended target filled with deuterium gas at 25 atm pressure and at liquidnitrogen temperature. The differential cross section in the center- of-mass system at 90 deg is measured and a value of (18 plus or minus 2.3) x 10/sup -//sup 3//sup 4/ cm/sup 2//sr is obtained. This value is considered to be an upper limit for the reaction; the data are consistent with no pi /sup o/ 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 93.5% conserved. (auth)
- Research Organization:
- Univ. of California, Berkeley
- NSA Number:
- NSA-15-021580
- OSTI ID:
- 4047804
- Report Number(s):
- UCRL-9544; 0031-899X
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 122; ISSN PHRVA
- Country of Publication:
- United States
- Language:
- English
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