TEST OF ISOTOPIC SPIN CONSERVATION FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$)
Abstract
The reaction d + d yields He/sup 4/ + pi /sup o/, which is forbidden by isotopic spin conservation is sought. A beam of deuterons at 460 Mev is scattered from an extended target filled with deuterium gas at 25 atm pressure and at liquidnitrogen temperature. The differential cross section in the center- of-mass system at 90 deg is measured and a value of (18 plus or minus 2.3) x 10/sup -//sup 3//sup 4/ cm/sup 2//sr is obtained. This value is considered to be an upper limit for the reaction; the data are consistent with no pi /sup o/ production. From a comparison of this upper limit with the theoretical prediction of the cross section for this reaction if isotopic spin need not be conserved, it is concluded that isotopic spin is at least 93.5% conserved. (auth)
- Authors:
- Publication Date:
- Research Org.:
- Univ. of California, Berkeley
- OSTI Identifier:
- 4047804
- Report Number(s):
- UCRL-9544
Journal ID: PHRVA; 0031-899X
- NSA Number:
- NSA-15-021580
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
- Additional Journal Information:
- Journal Volume: Vol: 122; Other Information: UCRL-9544. Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
- Subject:
- PHYSICS
Citation Formats
Poirier, J A, and Pripstein, M. TEST OF ISOTOPIC SPIN CONSERVATION FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$). United States: N. p., 1961.
Web. doi:10.1103/PhysRev.122.1917.
Poirier, J A, & Pripstein, M. TEST OF ISOTOPIC SPIN CONSERVATION FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$). United States. https://doi.org/10.1103/PhysRev.122.1917
Poirier, J A, and Pripstein, M. 1961.
"TEST OF ISOTOPIC SPIN CONSERVATION FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$)". United States. https://doi.org/10.1103/PhysRev.122.1917.
@article{osti_4047804,
title = {TEST OF ISOTOPIC SPIN CONSERVATION FROM AN EXPERIMENT LIMIT ON ](d + d $Yields$ He$sup 4$ + $pi$$sup 0$)},
author = {Poirier, J A and Pripstein, M},
abstractNote = {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)},
doi = {10.1103/PhysRev.122.1917},
url = {https://www.osti.gov/biblio/4047804},
journal = {Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D},
number = ,
volume = Vol: 122,
place = {United States},
year = {Thu Jun 15 00:00:00 EDT 1961},
month = {Thu Jun 15 00:00:00 EDT 1961}
}